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J Am Pharm Assoc (2003). 2013 Nov-Dec;53(6):611-7. doi: 10.1331/JAPhA.2013.12249.

Newest Vital Sign as a proxy for medication adherence in older adults.

Abstract

OBJECTIVE:

To assess the utility of the Newest Vital Sign (NVS) as a proxy for medication adherence in community-dwelling older adults.

DESIGN:

Descriptive cross-sectional study.

SETTING:

12 adult day care centers in the Lisbon metropolitan area, Portugal, between March and May 2009.

PARTICIPANTS:

100 white community-dwelling older adults.

INTERVENTION:

Participants were administered the NVS, Single Item Literacy Screener (SILS), and self-reported Measure of Adherence to Therapy (MAT).

MAIN OUTCOME MEASURES:

Health literacy and medication adherence.

RESULTS:

The mean (±SD) age of the respondents was 73.3 ± 7.8 years and 71% were women. The NVS score was 0.81 ± 0.10 (of 6 possible points), and 95% of the respondents scored in the three lowest possible scores, indicating a notable floor effect. Age was found to be inversely correlated with NVS score (P = 0.003). The MAT score was 36.2 ± 4.7 (range 17-42). No statistically significant association between the NVS and level of education (P = 0.059 [Kruskal-Wallis]), gender (P = 0.700 [Mann-Whitney]), SILS (P = 0.167), or MAT (P = 0.379) was identified.

CONCLUSION:

The utility of the NVS as a proxy for medication adherence in community-dwelling older adults is limited because of a floor effect that hinders its predictive power for medication adherence.

PMID:
24091561
DOI:
10.1331/JAPhA.2013.12249
[Indexed for MEDLINE]
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