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Is interview length associated with blood test participation? Evidence from three population-based HIV impact assessment (PHIA) surveys conducted from 2016–2017
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8 01 2021
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Source: J Acquir Immune Defic Syndr. 87(Suppl 1):S57-S66
Details:
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Alternative Title:J Acquir Immune Defic Syndr
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Personal Author:
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Description:Background:
High response rates in surveys are critical to ensuring that findings are unbiased and representative of the target population. Questionnaire length impacts response rates, with long interviews associated with partially complete surveys, higher item nonresponse (“don’t know” and “refuse” responses), and willingness to participate in future surveys. Our aim is to determine the impact of questionnaire length on blood test participation in population-based HIV surveys.
Methods:
Data are from population-based HIV impact assessments (PHIAs) conducted in Zambia, Eswatini, and Lesotho in 2016–2017. The PHIAs consist of an interview followed by a blood draw. Consent for blood draw was obtained before the interview in Eswatini, and after the interview in Zambia and Lesotho.
Results:
Across all three surveys, median interview duration was 16 minutes and median number of questions was 77. In adjusted analyses, there was a negative impact of interview duration on blood draw consent for individuals with unknown status in Lesotho and a positive relationship between questionnaire length and blood draw consent in Zambia for those with HIV-negative and unknown status.
Conclusion:
Although interview length is an important consideration to reduce respondent burden, a longer questionnaire does not necessarily result in lower consent rates for blood testing.
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Pubmed ID:34166313
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Pubmed Central ID:PMC10982955
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Funding:
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Volume:87
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