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J Low Genit Tract Dis. 2012 Jan;16(1):16-23. doi: 10.1097/LGT.0b013e3182293a49.

Cognitive testing of human papillomavirus vaccine survey items for parents of adolescent girls.

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1
Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA. richmana@ecu.edu

Abstract

OBJECTIVE:

Many studies have been conducted to understand what factors are associated with human papillomavirus (HPV) vaccine acceptability and completion of the 3-dose vaccination series, but few have examined whether people understand the survey items used to assess these relationships. Through a multisite collaborative effort, we developed and cognitively tested survey items that represent constructs known to affect vaccine acceptability and completion.

MATERIALS AND METHODS:

Investigators from 7 research centers in the United States used cognitive interviewing techniques and in-person and telephone interviews to test 21 items. Four rounds of testing, revising, and retesting were conducted among racially and ethnically diverse parents (n = 62) of girls between the ages of 9 and 17 years.

RESULTS:

The final survey contained 20 items on attitudes and beliefs relevant to HPV vaccine. Some parents misinterpreted statements about hypothetical vaccine harms as statements of fact. Others were unwilling to answer items about perceived disease likelihood and perceived vaccine effectiveness, because they said the items seemed to have a "right" answer that they did not know. On the basis of these and other findings from cognitive testing, we revised the wording of 14 questions to improve clarity and comprehension. We also revised instructions, response options, and item order.

CONCLUSIONS:

Cognitive testing of HPV vaccine survey items revealed important differences between intended and ascribed item meaning by participants. Use of the tested survey questions presented here may increase measurement validity and researchers' ability to compare findings across studies and populations. Additional testing using quantitative methods can help to further validate these items.

PMID:
21964205
DOI:
10.1097/LGT.0b013e3182293a49
[Indexed for MEDLINE]
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