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Table 2 Sex work responses by ZEST study population

From: The influence of interviewers on survey responses among female sex workers in Zambia

  Univariate Bivariate regression a
N % / Median [IQR] ICC b Male
IVR
Female
IVR
p-value
Age at first sex for money 949 19 [17–21] 1.6% 19.8 19.0 0.38
Condoms available while working 963 1.8%     0.26
 Never   1.8%   1.2% 2.1%  
 Seldom   4.6%   3.2% 5.3%  
 Sometimes   62.7%   60.7% 68.3%  
 Often   8.3%   9.7% 7.7%  
 Always   22.6%   25.1% 16.6%  
Ask SWC to use a condom 963      0.55
 Never   3.8%   2.2% 4.0%  
 Seldom   5.9%   3.7% 6.4%  
 Sometimes   54.2%   53.2% 62.2%  
 Often   11.7%   14.5% 11.0%  
 Always   24.3%   26.5% 16.4%  
SWCs ask to use a condom 965      0.49
 Never   15.3%   16.2% 7.8%  
 Seldom   18.2%   24.7% 15.8%  
 Sometimes   57.7%   54.7% 66.7%  
 Often   5.0%   2.6% 5.6%  
 Always   3.7%   1.8% 4.1%  
SWCs request that not to use a condom 965      0.46
 Never   10.1%   10.3% 4.6%  
 Seldom   13.8%   19.1% 10.9%  
 Sometimes   51.5%   55.4% 54.5%  
 Often   19.5%   12.7% 24.1%  
 Always   5.2%   2.4% 5.8%  
ZMW price for vaginal sex with condom 931 100 [50–150] 6.6% 101 99 0.95
ZMW price for vaginal sex without condom 883 150 [100–250] 7.0% 203 177 0.58
ZMW price for anal sex with condom 220 150 [70–200] 16.7% 146 185 0.65
ZMW price for anal sex without condom 213 200 [130–300] 14.8% 242 263 0.89
Average nightly # of SWCs: other FSW 954 4 [3–5] 18.9% 6.0 11.2 0.69
Average nightly # of SWCs: respondent 960 4 [3–5] 10.2% 4.0 5.6 0.58
# of nightly SWCs use condom with 941 2 [2–3] 2.3% 2.4 3.2 0.49
# of nightly SWCs do not use condom with 940 1 [0–2]   1.4 2.2 0.40
Unable to use condom when wanted to
with SWC in past 12 m
962 75.6% 17.0% 74.0% 82.6% 0.65
Respondent asks SWC to share HIV status 961      0.38
 Never   32.2%   24.2% 42.4%  
 Seldom   14.7%   15.9% 17.6%  
 Sometimes   41.6%   46.4% 33.8%  
 Often   5.7%   6.5% 3.2%  
 Always   5.8%   7.0% 3.0%  
SWCs ask respondent to share HIV status 962      0.95
 Never   37.2%   36.9% 34.8%  
 Seldom   15.6%   18.6% 18.4%  
 Sometimes   40.5%   39.7% 41.5%  
 Often   4.4%   3.2% 3.5%  
 Always   2.3%   1.6% 1.8%  
  1. 12 m 12 months, FSW female sex worker, ICC Intraclass Correlation Coefficient, IQR inter-quartile range, IVR interviewer, SWC sex work client, ZMW Zambian Kwacha: 1 Kwacha ~US$ 10
  2. a All bivariate regressions included study site fixed effects and interviewer random intercepts. Values for male and female IVR are marginal predicted values based on regression coefficients. b ICC is the proportion of all variance in a model without interviewer gender attributable to variation in interviewer identity; not available for Poisson or ordered logistic models.. P-value is for a χ2 test, adjusted for multiple testing across all results shown in Tables 1, 2, 3 and 4 using the Benjamini-Hochberg method