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BMC Health Serv Res. 2011; 11: 203.
Published online Aug 24, 2011. doi:  10.1186/1472-6963-11-203
PMCID: PMC3224259

Measuring client satisfaction and the quality of family planning services: A comparative analysis of public and private health facilities in Tanzania, Kenya and Ghana

Abstract

Background

Public and private family planning providers face different incentive structures, which may affect overall quality and ultimately the acceptability of family planning for their intended clients. This analysis seeks to quantify differences in the quality of family planning (FP) services at public and private providers in three representative sub-Saharan African countries (Tanzania, Kenya and Ghana), to assess how these quality differentials impact upon FP clients' satisfaction, and to suggest how quality improvements can improve contraceptive continuation rates.

Methods

Indices of technical, structural and process measures of quality are constructed from Service Provision Assessments (SPAs) conducted in Tanzania (2006), Kenya (2004) and Ghana (2002) using direct observation of facility attributes and client-provider interactions. Marginal effects from multivariate regressions controlling for client characteristics and the multi-stage cluster sample design assess the relative importance of different measures of structural and process quality at public and private facilities on client satisfaction.

Results

Private health facilities appear to be of higher (interpersonal) process quality than public facilities but not necessarily higher technical quality in the three countries, though these differentials are considerably larger at lower level facilities (clinics, health centers, dispensaries) than at hospitals. Family planning client satisfaction, however, appears considerably higher at private facilities - both hospitals and clinics - most likely attributable to both process and structural factors such as shorter waiting times and fewer stockouts of methods and supplies.

Conclusions

Because the public sector represents the major source of family planning services in developing countries, governments and Ministries of Health should continue to implement and to encourage incentives, perhaps performance-based, to improve quality at public sector health facilities, as well as to strengthen regulatory and monitoring structures to ensure quality at both public and private facilities. In the meantime, private providers appear to be fulfilling an important gap in the provision of FP services in these countries.

Background

Numerous studies have examined the effects of family planning quality on the uptake and continuation of family planning methods [1-7]. One principal determinant of uptake and continued utilization of family planning services is overall client satisfaction with those services [8,9]. Studies of contraceptive discontinuation rates, for example, have indicated that - with the exception of the desire to become pregnant - the principal reason for discontinuation is dissatisfaction with the quality of services [10].

Both the public and private sectors supply substantial portions of family planning methods in developing countries, but face different incentives to provide services of high quality and to ensure client satisfaction [11,12]. Public sector health services, for example, are less likely to be motivated by economic incentives (since governments and their health facilities seldom go out of business) and have frequently been characterized by low staff morale, attendance and performance, often related to poor or infrequent pay, at least relative to the private sector [13,14]; poor quality of care and treatment [15]; shortages of workers, medicine, supplies and functioning equipment; and waste and inefficiency [11,15-18].

Motivated to maximize the demand for their services while minimizing their costs, private for-profit facilities generally face greater incentives to be efficient and client-friendly providers of health care. Even so, they have been shown to be of varying quality, often due to the inability of government regulatory bodies to adequately monitor and enforce standards [19-22]. Private providers may also take advantage of informational asymmetries to sell unnecessary - or poor quality services - to unsuspecting consumers [21]. Non-governmental facilities, often not-for-profit and affiliated with religious, faith-based organizations, have been touted as being likelier to provide higher quality services because of their social mission, but evidence to support this has been mixed [13,18].

As calls for privatization and performance-based incentive schemes have become an increasing part of the dialogue surrounding health systems strengthening in developing countries [11,12,23-25], the need for evidence-based assessments of quality differentials between public and private providers has also increased. To date, only a handful of studies have examined differences in the quality of family planning services provided by the public and private sectors [13], and even fewer have sought to link those quality differentials to measures of client satisfaction [26]. As a result, little is known about how moves towards greater private sector provision of family planning will impact upon client satisfaction, contraceptive use, and ultimately fertility.

This study examines differences in technical, structural and process measures of quality between public and private health facilities, both in hospitals and primary care facilities, in three countries - Kenya, Tanzania and Ghana. These countries were chosen principally because of the availability of detailed information on random samples of family planning suppliers via Service Provision Assessments and because the private health sector varies in importance as a provider of family planning across the three countries. Data from Demographic and Health Surveys indicate that the percentage of women receiving contraceptive supplies from private family planning providers ranges from 12.7% in Tanzania (private medical 5.0%; religious/voluntary 7.7%) [27], to 30.5% in Kenya (24.2% private medical; 6.3% mission hospital/clinic) [28], and to 53.7% in Ghana [29]. Further, the family planning situation in these countries is fairly typical for Sub-Saharan Africa. For the region as a whole, the contraceptive prevalence rate is 20.9 percent of women aged 15 to 49 years [30], close to the rates observed in Tanzania (26.4%) [27] and Ghana (23.5%) [29]. Only Kenya has a contraceptive prevalence rate that significantly exceeds this average (45.5%) [28].

This study links measures of FP quality to measures of client satisfaction at each type of public and private family planning provider. Our hypothesis is that higher levels of quality - particularly indicators that measure clients' perceptions of client-provider interactions - will yield higher levels of client satisfaction. In turn, higher rates of client satisfaction have been shown to yield higher family planning adoption and continuation rates [10], though such outcomes are not the focus of this study. Importantly, this study will also assess which specific measures of family planning service quality achieve the largest incremental gains in client satisfaction.

The next section describes the data, the quality measures, and analytical methods utilized in this study. Following that are discussions of the bivariate and multivariate analyses. The last section summarizes the results and discusses some policy recommendations.

Methods

Service Provision Assessments, developed by ORC Macro [31], are facility-based surveys intended to provide a comprehensive picture of the quality and availability of a basic health services, including those for maternal, child and reproductive health, in a given country. They are intended to be nationally representative of the supply environment, and provide a gauge of how capable existing services are to meet the needs of a country's population. The principal advantages of the SPAs are that they are standardized across countries, thereby allowing direct comparisons in assessments of family planning service availability and quality, and of sufficient sample size to generate sub-national level or facility-type estimates. Further, data collectors, recruited from among nurses and other health professionals trained in survey implementation and interviewing, possess the requisite technical skills to assess the quality and procedural correctness of provider-client interactions.

This study makes use of Service Provision Assessments (SPAs) conducted in Ghana [29], Tanzania [31] and Kenya [32]. In Tanzania, the SPA was led by the National Bureau of Statistics in collaboration with the Ministry of Health and Social Welfare (MoHSW - Mainland and Zanzibar) and the Office of the Chief Government Statistician, Zanzibar. In Ghana, the SPA was carried out by the Ghana Statistical Service (GSS) with assistance and support from the Health Research Unit (HRU), the Ministry of Health (MOH), the Ghana Registered Midwives Association (GRMA), the Planned Parenthood Association of Ghana (PPAG), and the National Population Council (NPC). Finally, the Kenya SPA was undertaken by the National Coordinating Agency for Population and Development (NCAPD), the Ministry of Health (MOH), and the Central Bureau of Statistics. In each country, ORC Macro provided technical assistance.

Instruments

To provide a broad and detailed picture of the quality and availability of health services and perceptions of quality, the SPAs consist of four standardized data collection components. As noted above, all survey instruments and tools were previously fielded in a number of countries, though country-specific pre-testing was undertaken in each country to ensure that questions were appropriate to local circumstances:

(1) The Facility Inventory Questionnaire was used to obtain information on staffing, training, infrastructure, medicines, supplies, and services offered. The focus was on ascertaining the functional ability of facilities to provide services of acceptable standards.

(2) A provider interview collected information from samples of health care workers - in particular those who actually provide client services - in order to determine qualifications, experience and perceptions of the service delivery environment.

(3) Observations of family planning services were conducted to assess providers' adherence to accepted standards of quality and service delivery.

(4) Exit interviews were conducted with clients who received family planning services to determine the clients' experience of the client-provider interaction, recollection of instructions and FP related information, and perceptions of the service delivery environment.

Sampling

Facilities

In each of the countries, health facilities (Table (Table1)1) were chosen at random from among the population of public, private, and faith-based facilities that offered services for maternal, child, and reproductive health. Sample sizes were determined based on funding, logistical considerations and minimum sample sizes required when regional estimates were desired. Following similar analyses examining differences in coverage by public and private providers [11], facilities were stratified by operating authority (public vs. private) and by facility type (hospital and other) and a systematic sample was drawn after a random start. Private facilities were defined as those that were either for-profit providers or nongovernmental organizations using market-based approaches to service delivery. In some cases, over-sampling was done to permit analysis by region and facility type, and weights were created to adjust for unequal probabilities of selection.

Table 1
Sample of Health Facilities by Country

The final sample of health facilities used in this study - restricted to those which offer family planning services - included 386 in Ghana, 323 in Kenya and 482 in Tanzania (Table (Table2).2). In each country, the majority of the health facilities were publicly operated. The weighted sample of hospitals made up 10% of facilities in Ghana, 7% of facilities in Kenya and 4% of facilities in Tanzania. Similarly, private sector providers made up 35% of facilities in Ghana and Kenya and 17% of facilities in Tanzania (Table (Table22).

Table 2
Sample Distribution of Facilities, Provider Interviews, and Client Exit Interviews

Providers

In all three countries, a sample of health care workers/providers was selected from those who were present in the facility on the day of the survey and who provided services in the four areas (child health, family planning, maternal health, and sexually transmitted infections/HIV/AIDS) assessed by the SPA. If a facility had fewer than 8 health care workers, all who were present on that day were interviewed. In facilities with more than 8 providers, at least one provider from each service was interviewed to obtain a minimum of 8 providers. The samples of providers of family planning included 845 providers in Ghana, 859 providers in Kenya and 1,244 providers in Tanzania (Table (Table22).

Training and Data Collection

In each country, data collectors were recruited from nurses, clinical officers or social scientists with prior experience in survey implementation and interviewing. Data collectors spent approximately three weeks in training, which included classroom lectures, practical on-site experience in health facilities, and role-playing for observations and exit interviews.

Fieldwork lasted several months, and was undertaken by 13-17 teams of interviewers, generally consisting of one team leader and 2-4 interviewers. In small facilities, data collection took approximately one day, but larger facilities required several days. If a particular service for observation was not offered on the day of a visit, interview teams returned on a day when it was being offered. Interviews with providers of family planning were undertaken with those most knowledgeable of those services at a facility. Informed consent was also obtained from the providers and the facility in-charge.

Observations and Exit Interviews

Observations were conducted of clients who came for maternal, child, reproductive health or sexually transmitted infection (STI) services. This sample was opportunistic because it was not possible to know how many eligible clients would come to the facility on the day of the observation. Following the observation of client-provider interaction, exit interviews were conducted to determine client satisfaction with services provided. Information on refusal rates for the exit interviews was not available from the published sources or from the data. In total, 611 interviews with family planning clients were conducted in Ghana, 628 interviews in Kenya, and 1,005 interviews in Tanzania (Table (Table22).

Operational definitions of quality of care and client satisfaction

Over the years, researchers have developed numerous systems and indicators for measuring the quality of family planning services [6,8,9,33,34]. It is now well-understood that the quality of health services is more than just bricks and mortar availability of infrastructure, supplies or equipment. In this paper, we follow the structure outlined by Donabedian [35], focusing on several categories of quality measures which we describe in detail in Table Table3.3. These include structural, interpersonal and technical attributes of service quality.

Table 3
Attributes and Indicators Used for the Assessment of Quality of Care in This Study

Structural attributes provide an assessment of the overall capacity of health facilities to provide health services. At a bare minimum, the provision family planning services requires at least some minimal level of infrastructure. Specifically, structural attributes of quality were assessed by physical infrastructure, examination equipment, management systems, availability of services and the counseling environment. The Facility Inventory Questionnaire provided the source of data for this component.

Interpersonal and technical aspects of process attributes were considered separately. Interpersonal aspects of quality included maintenance of privacy, confidentiality and provider's handling of client concerns. Prescription of an injectable method by the provider was used as a measure of provider responsiveness to client needs, since the demand for injectables was extremely high among clients who visited these facilities. Technical aspects included elements such as taking a reproductive history, conducting a physical examination and a provider's observation of the correct procedure for administering the injectable contraceptive. The duration of consultation was used as a measure of the technical quality of care. Data for this component came from direct observation of client-provider interactions.

Client satisfaction was measured using clients' responses to questions about service quality, rated as both an index and a discrete measure of problems encountered during the FP visit (none versus any). Specifically, respondents to the exit interviews were asked to report on up to twelve facets of their perceptions of the quality of the visit (Table (Table4).4). Rather than examine each of these facets individually, we aggregated them into an index using the polychoricpca principal components command for discrete variables using the Stata 10.1 statistical software program [36]. While many methods exist for the construction of indexes, this method estimates the polychoric and polyserial correlations amongst the included variables and then performs principal component analysis on the resulting correlation matrix. The first principal component was used as the index for client satisfaction. Alternatively, a discrete measure of client satisfaction was constructed with a value of 1 given for respondents who reported "no problem" with all of the 12 aspects of quality and a value of 0 given for respondents who reported "large" or "small" problem with any of the twelve aspects.

Table 4
Measures of Client Satisfaction

Data analysis

At the bivariate level, differences in quality of care between private and public sector facilities were assessed. The unit of analysis was the facility level. Because hospitals tend to be larger and offer a wider range of services than clinics, the analysis was stratified into hospitals and all other facilities (clinics, health centers, dispensaries, maternity units and stand-alone VCT centers). T-tests were conducted for continuous variables and chi-squared tests of independence were conducted for categorical variables. To examine the magnitude of the relationship between quality measures and client satisfaction, multiple regression analyses were employed. For the binary satisfaction outcome (i.e., reporting of no problems), a probit model was specified and estimated by maximum likelihood. For the continuous index of satisfaction (e.g. the score of the first principal component of the "problem" index), linear regression was used. In both cases, because clients and providers were nested within facilities, Huber-White standard errors were used to control for the non-independence of client observations clustered at the facility level.

Results

Differences in quality of care: bivariate analysis

Table Table55 Table Table66 and Table Table77 compare mean values of indicators representing structural and process attributes of quality by operating authority (private vs. public sector) stratified by facility type for each of the countries. Overall, quality varied more considerably at lower level facilities than at hospitals, and lower level public facilities appeared to be of a slightly lower quality on average than similar-sized private facilities. Fewer differences were detected between public and private hospitals.

Table 5
Differences in Attributes of Quality (bivariate analysis) - Tanzania
Table 6
Differences in Attributes of Quality (bivariate analysis) - Kenya
Table 7
Differences in attributes of quality (bivariate analysis) - Ghana

Structural attributes of quality

In general, there did not appear to be systematic differences in infrastructure and equipment at the hospital level, with the exception of hospitals in Ghana. At the health center level and below, private facilities in all three countries scored higher on measures of physical infrastructure and necessary equipment in examination rooms.

On the other hand, public facilities - both hospitals and lower - tended to offer more FP methods than private facilities. Public Ghanian hospitals offered 10.5 FP methods on average, considerably more than private Ghanian hospitals which offered 5.7 methods on average. No statistically significant differences in FP availability were apparent at lower level facilities. Further, public facilities fairly consistently had higher levels of FP guidelines and protocols available, had more visual aids, and were more likely to have individual client cards than private facilities.

Only in Tanzania were measures of management systems significantly better at both public hospitals and health centers relative to private facilities. For example, nearly 80% of public hospitals in Tanzania had a stock inventory that was organized and protected as compared with only 60% of private/NGO hospitals. Similarly, 64% of public health centers had similar stock inventory systems as compared with less than half of private facilities.

Process attributes

While the picture surrounding structural quality at public and private facilities was mixed, process quality was clearly better at private facilities. In no country and at neither hospitals nor health centers were process measures of quality statistically significantly better at public relative to private facilities. For example, over 90% of clients at private health centers in Kenya reported that providers asked about client concerns regarding methods or method use as compared to only 61% of providers at public health centers. The probability that confidentiality would be assured also appeared higher at private relative to public facilities.

Further, waiting times were nearly always considerably longer at public facilities than private facilities, at least at lower level facilities. In both Tanzania and Kenya, FP clients waited over 40 minutes longer on average at public sector health centers than at private health centers and clinics. No statistically significant differences in waiting times were found at hospitals in any of the three countries; the duration of the FP consultation was roughly the same across public and providers in all countries as well.

There appeared to be few differences in technical aspects of quality between private and public facilities. In Kenya, providers in public hospitals were more likely to take reproductive histories but no such difference appeared in hospitals in the other two countries. At lower level facilities, private providers performed better in Tanzania, but not in the other two countries. Physical exams also appeared to be similar, as were injectable procedures.

Differences in satisfaction: bivariate analysis

At all levels and in all three countries, respondents reported higher satisfaction with the quality of the examination and treatment at private facilities (Table (Table8,8, Table Table9,9, Table Table10).10). In some cases, these differences were not large though they were statistically significant. For example, in Tanzania 96.8% of respondents reported "no problem" with the quality of treatment in public hospitals versus 99.4% of respondents at private hospitals. While this difference appears small, it was statistically significant at the 5% level. Differentials in perceptions of quality appeared largest with waiting times. For example, roughly 40% of clients reported problems with waiting times at public clinics in Kenya versus only 5% of clients at private clinics.

Table 8
Differences in Ratings of Satisfaction (Percent saying "No problem"), Tanzania
Table 9
Differences in Ratings of Satisfaction (Percent saying "No problem") -Ghana
Table 10
Differences in Ratings of Satisfaction (Percent saying "No problem") - Kenya

A second area of clear differences between public and private facilities was with the availability of medicines or contraceptive methods. For example, only two-thirds of respondents reported "no problem" with availability at public clinics in Kenya, versus 91% at private clinics. A similar result was found in Tanzania though not in Ghana. Perceptions of quality were high at both public and private facilities in Ghana. The highest levels of dissatisfaction were with the cleanliness of public health centers, for which 12% of respondents reported a problem.

Using the discrete measure of quality - the absence of any problems during an FP consultation - the differences were starker, as shown by Figure Figure1.1. In four out of six cases, satisfaction was higher at private facilities relative to public facilities. In Kenya, nearly two-thirds of FP clients at private health centers reported no problem as compared with just under one-third of FP clients at public health centers. There tended to be greater parity in satisfaction at hospitals relative to health centers, and in fact satisfaction at public hospitals was higher in Tanzania - but not at a statistically significant level - than at private hospitals, though in both cases only about half of clients reported no problems.

Figure 1
Client satisfaction by Facility Management, Level and Country.

Correlates of client satisfaction - multivariate regression analysis

We examined the correlates of client satisfaction among clients of private and public sector facilities in each of the countries. Overall, even with controls for specific attributes of quality, private facilities seem to have higher levels of client satisfaction than public facilities (Table (Table11).11). This was true at the clinic level in all three countries and at the hospital level in Ghana. Further, the measures of quality that most impacted upon client perceptions of quality were those that were most directly observable by them, namely process attributes of quality, for which private facilities tended to score better.

Table 11
Factors Associated with Client Satisfaction (multivariate analysis) (Coefficient and standard error)

Structure

Few measures of structural quality appeared to affect client satisfaction. Service availability - as measured by the number of FP methods offered and the number of days per week that FP services were offered - had little impact on client satisfaction. Whereas public facilities appeared in bivariate analyses to have better management systems (e.g. having a system of Quality Assurance, having appropriate stock management procedures in place) - perhaps because competitive mechanisms and for-profit motives that encourage accountability at private facilities are less prevalent at public facilities - these did not show a statistically significant association with client satisfaction in the multivariate analyses. Having a supervisory visit in the last 6 months was actually negatively associated with client satisfaction in two cases, perhaps because more troubled facilities are likely to require closer supervision. Other structural factors that had no influence were the presence of FP protocols and guidelines, training of staff, and number of staff.

Process

Consistently, longer waiting times were negatively associated with client satisfaction at all facilities and in all countries. Conversely, the performance of more physical and reproductive health exam elements increased satisfaction, as did prescribing an injectable method. Each of these aspects of quality are easily discernible, even to an untrained client, and therefore likely to perceptibly influence satisfaction, though they may have little impact on meeting the overall FP needs of clients. Other process factors had little influence, including the maintenance of confidentiality, informing clients of potential side effects, and noting client concerns.

Discussion

This study has focused on measuring the extent of quality differentials between public and private FP providers in three countries and then relating client satisfaction to both clients' perceptions and experts' assessments of the quality of FP services. As expected we found significant quality differences between public and private providers, mostly at lower level facilities, which accords with economic theory regarding supply side responsiveness to client demand. On the other hand, we found little evidence that private providers skimped on less (client) perceptible technical measures of quality.

We found little evidence that client satisfaction bears much relationship with technical aspects of quality, as perceptions of adherence to appropriate family planning procedures require greater technical knowledge and awareness than is likely to be possessed by the typical FP client. This is consistent with previous research [8,21]. As noted by one set of researchers, "Consumers are usually unable to assess the technical quality of services, with the result that they place more weight on aspects of perceived quality, such as the interpersonal skills of providers and the comfort of the environment in which treatment occurs, both of which may be unrelated to technical competence. They may, therefore, be more exposed to inadequately qualified practitioners providing care of very poor quality" ([21] p. 326). Previous studies [37,38] have found that the quality of client-provider interactions contributes significantly to client satisfaction and contraceptive continuation. In this study - and in confirmation with economic incentives - these aspects also tended to be better at private and NGO facilities relative to public facilities, at least at the clinic level.

These results, however, do not imply that client satisfaction should be the principal goal of providers. In fact, client satisfaction is inextricably linked to expectations, which may differ across clients of different types of facilities. Certainly the evidence exists to show that higher levels of client satisfaction with process measures of quality increases the likelihood of contraceptive use and continuation [10]. But structural measures of quality - such as frequent shortages of methods or inappropriate guidance - are also likely to inhibit long-term contraceptive continuation. Ensuring that clients are appropriately informed about methods, their uses, side effects and limitations; are correctly given physical exams; and are seen by trained providers are all important determinants of quality and contraceptive use [1,2]. Other convenience measures, such as waiting times, seem to be important determinants of client satisfaction, but are less likely to have any impact upon the technical quality of services, though they may impact longer term use of methods if they inhibit clients from returning for follow-up visits. Regardless, FP providers would obviously be well-advised - regardless of their incentive structures - to monitor and ensure all aspects of FP quality.

One shortcoming of this analysis was the inability to distinguish between for-profit and not-for-profit private facilities, a lament shared by previous researchers [11]. This represents an important limitation because the incentive structures - such as the trade-off between cost savings and quality - may differ considerably between the two types. Nonetheless, in at least two of the countries, the size of the nongovernmental mission sector - and therefore as a proportion of our facility sample - is not large. In Kenya, for example, the private medical sector is the predominant private family planning provider, constituting 80% of all private provision of family planning. Similarly, in Ghana, the nonprofit nongovernmental sector provides only a very small percentage of overall family planning supply [29]. As a result, the results for these two countries are more likely a reflection of differences between government providers relative to private for-profit providers, rather than religious and mission providers.

An additional limitation relates to the use of exit interviews as a source of client satisfaction. Exit interviews by definition involve a sample of clients who have already made a choice to appear at a specific facility and are therefore likely to believe that the facility will be minimally satisfactory. Non-clients may have chosen to go elsewhere or to do nothing, simply because they do not believe that quality at a particular facility will be satisfactory. For example, potential clients who are particularly intolerant of long waiting times may eschew public facilities specifically because of perceptions that waiting times will be unacceptable. Therefore, the sample of actual clients - and those completing the exit interviews - may represent a group who cares less about waiting times, thereby understating the true effect of waiting times on client satisfaction. To fully address the effects of quality on client satisfaction would require a random sample of the larger population of reproductive age women, linking their reproductive health choices - and satisfaction - to the supply environment as measured with a SPA.

Conclusions

This study makes an important contribution by highlighting differences in quality between public and private facilities according to three aspects of quality and fills a gap in knowledge on this topic by linking structural and process quality to client satisfaction. The finding of significantly lower technical quality at lower level public facilities should raise some concern. Further study is clearly warranted to determine the principal causes of quality deficiencies - insufficient training of personnel, resource shortages, limited management oversight or some other reason. Our findings hint at a role for each of these causes.

Referring to one of the limitations of this analysis, future large-scale studies, such as the SPAs, should make a point to distinguish between different types of private facilities, and to make this data available to researchers. Additionally, the value of SPAs could be further enhanced if they were timed and coordinated to cover the same populations and catchment areas covered by large scale population surveys such as the DHS. Such a mechanism, as noted above, could provide a richer means by which to evaluate the effects of the health service supply environment on a wide range of health behaviors and choices in developing country populations.

Finally, as the private sector appears to be an important provider of reproductive health services in the three countries studied, care should be taken to prevent the implementation of policies or regulations that significantly burden or hamper the functioning of the private sector lest national-level reproductive health indicators suffer as a result.

Competing interests

The authors declare that they have no competing interests.

Authors' contributions

All authors participated in research design and conceptualization, data analysis, writing, and revision of this manuscript. All authors have read and approved the final manuscript.

Authors' information

Paul Hutchinson, PhD, and Mai Do, DrPH, MD, are Assistant Professors in the Department of International Health and Development in the Tulane University School of Public Health and Tropical Medicine. Sohail Agha, PhD, is a Senior Technical Advisor with Population Services International (PSI).

Pre-publication history

The pre-publication history for this paper can be accessed here:

http://www.biomedcentral.com/1472-6963/11/203/prepub

Acknowledgements

This study was conducted under the Private Sector Partnerships-One (PSP-One) project with support from the United States Agency for International Development (contract number GPO-I-00_04-00007- 00). The paper benefitted from technical review by Sara Sulzbach, PSP-One Research Director and Kathryn Banke, Senior Associate, PSP-One.

Institutional Review

The protocol, methods and all materials that constitute the study described in the manuscript were approved by the Biomedical Institutional Review Board of the Tulane University School of Public Health and Tropical Medicine.

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