Table 3.

Factors associated with prevalence of recent HIV testing using three regression models on original (n=936) and imputed (1295) data of female sex workers in Iran, 2015

Variables	Crude Analysis	Adjusted Modela	Adjusted Imputed Modelb
	PR* (95% CI)	PR (95% CI)	PR (95% CI)
Type of sample
Facility-based	1	1	1
Outreach	0.45 (0.30, 0.67)e	0.64 (0.47, 0.87)e	0.55 (0.38,0.80)e
Education
Illiterate	1	1	1
Primary school or less	1.16 (0.95, 1.42)	0.91 (0.80, 1.04)	0.99 (0.85,1.16)
Middle and high school	1.25 (0.98, 1.62)c	0.94 (0.85, 1.06)	1.05 (0.87,1.26)
Diploma and above	1.35 (0.98, 1.86)c	0.96 (0.89, 1.04)	1.08 (0.93,1.25)
Unstable housing
Stable	1	1	1
Unstable	1.13 (0.95, 1.34)	1.02 (0.92, 1.14)	1.08 (0.97,1.20)
Incarceration history *
No	1	1	1
Yes	1.15 (1.01, 1.31)d	1.1 (1.00, 1.20)d	1.08 (0.98,1.20)c
Experienced sexual violence *
No	1	1	1
Yes	1.09 (0.97, 1.22)	1.01 (0.89, 1.12)	1.02 (0.91,1.14)
HIV Comprehensive knowledge
Insufficient	1	1	1
Sufficient	1.13 (1.03, 1.26)d	1.01 (0.95, 1.08)	1.02 (0.96,1.08)
Self-perceived risk for HIV
No risk	1	1	1
Yes (low, moderate, high)	1.11 (1.00, 1.23)d	0.99 (0.92, 1.06)	1.05 (0.96,1.16)
Number of paying partners ***
0	1	1	1
1	1.08 (0.97, 1.22)	1.01 (0.92, 1.10)	1.01 (0.92,1.12)
2–5	1.03 (0.85, 1.25)	0.99 (0.86, 1.50)	0.96 (0.84,1.10)
>5	1.24 (1.03, 1.50)d	1.20 (1.05, 1.35)e	1.16 (1.02,1.33)e
Number of non-paying partners ***
0	1	1	1
1	0.92 (0.83, 1.02)	0.89 (0.84, 0.95)e	0.94 (0.87,1.00)d
>1	1.08 (0.96, 1.23)	1.07 (1.00, 1.16)d	1.05 (0.96,1.14)
Male condom use with all partners ***
Consistent	1	1	1
Inconsistent	0.87 (0.80, 0.95)e	0.93 (0.87, 0.99)d	0.92 (0.85,0.99)d
Harm reduction service use **
No	1	1	1
Yes	1.86 (1.44, 2.41)f	1.34 (1.10, 1.61)e	1.35 (1.15,1.58)e
Health service utilization **
No	1	1	1
Yes	1.66 (1.18, 2.34)e	1.39 (1.14, 1.70)e	1.38 (1.11,1.72)e
Knowing a site for HIV testing
No	1	1	1
Yes	7.64 (3.86, 15.10)f	4.80 (2.60, 8.60)f	5.77 (3.04,10.94)f

^*Prevalence ratio;

^aThose variables with P-value less than 0.02 in univariate analysis were entered to this adjusted model (the univariate results of other variables are not shown here);

^bRegression model using the imputed variables;

^cP-value < 0.01;

^dP-value < 0.05;

^eP-value < 0.01;

^fP-value < 0.001;

^*Duration: lifetime;

^**Duration: past year;

^***Duration: past month