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Table 2 Association between demographics and behavioural factors with HIV status and STIs among sex workers in Johannesburg and Pretoria

From: Sexual and reproductive health outcomes among female sex workers in Johannesburg and Pretoria, South Africa: Recommendations for public health programmes

  HIV POSITIVE PREVIOUS STI
N = 1422 JHB
N = 408 PTA
JHB
N (%)
Multivariate
analysis
AOR (95% CI)
PTA
N (%)
Multivariate
analysis
AOR (95% CI)
JHB
N (%)
Multivariate
analysis AOR (95% CI)
PTA
N (%)
Multivariate
analysis
OR (95% CI)
SOCIO DEMOGRAPHICS
Age at 1st visit (years)
<25
25–29
30–34
>35
77 (23.8)***
206 (41.6)
182 (51.1)
110 (58.2)
1.0
1.0 (0.8–1.2)
1.6 (1.3–2.1)
2.1 (1.5–2.9)
9 (22.0)***
36 (40.5)
73 (57.9)
90 (64.8)
1.0
0.5 (0.3–0.9)
1.4 (0.9–2.1)
2.1 (1.4–3.4)
167 (49.1)
228 (44.1)
159 (43.1)
76 (38.8)
  5 (11.6)
4 (4.4)
14 (10.9)
8 (5.7)
1.0
0.30 (0.1–1.3)
0.58 (0.2–1.9)
0.32 (0.1–1.1)
Education
Primary
Grade 8–10
Grade 11–12
Tertiary level
27 (61.4)**
214 (45.6)
308 (39.6)
21 (31.8)
1.0
1.3 (1.0–1.6)
0.8 (0.6–1.0)
0.6 (0.5–1.1)
37 (62.7)*
98 (56.0)
68 (46.9)
7 (36.8)
1.0
1.3 (0.8–1.9)
0.7 (0.5–1.1)
0.5 (0.2–1.4)
16 (34.8)**
198 (40.4)
384 (47.5)
27 (38.6)
1.0
0.8 (0.6–1.0)
1.4 (1.1–1.7)
0.8 (0.5–1.3)
4 (6.7)**
24 (13.3)
5 (3.4)
1 (5.3)
1.0
1.3 (0.4–5.3)
0.4 (0.1–1.6)
0.2 (0.0–3.2)
Main partner
No
Yes
298 (42.9)
277 (41.5)
  103 (57.22)
107 (49.3)
  340 (46.6)*
290 (41.9)
1.0
0.8 (0.7–1.0)
12 (6.5)
22 (10.0)
 
Child lives with sex worker
0
≥1
160 (53.2)
51 (52.0)
  160 (53.2)
51 (52.0)
    27 (8.8)
6 (5.9)
 
Adult dependents
0
1–2
≥3
71 (42.3)
321 (43.6)
173 (39.7)
  18 (46.2)
112 (55.5)
77 (51.0)
  91 (50.8)*
319 (41.8)
211 (46.3)
1.0
0.8 (0.6–1.0)
1.1 (0.9–1.4)
5 (12.8)
14 (6.7)
15 (9.8)
 
Country of birth
South Africa
Zimbabwe
Other
286 (48.6) ***
210 (35.4)
79 (43.7)
1.0
0.6 (0.5–0.8)
1.1 (0.8–1.5)
123 (53.7)
80 (50.6)
8 (66.7)
  252 (41.3)
288 (46.4)
90 (47.1)
  12 (5.1)***
18 (11.1)
4 (33.3)
1.0
1.4 (0.53–3.9)
7.8 (1.6–37.1)
BEHAVIOURS
Alcohol use
No
Yes
125 (38.9)
406 (43.1)
  84 (50.6)
117 (53.7)
  157 (46.6)
428 (43.8)
  14 (8.3)
18 (8.1)
 
Marijuana use
No
Yes
498 (42.4)
33 (37.1)
  181 (51.1)
20 (66.7)
  542 (44.4)
43 (46.7)
  27 (7.5)
5 (15.6)
 
Years in sex work
<2
2–5
>5
180 (38.0)***
125 (41.8)
76 (60.8)
1.0
1.0 (0.7–1.3)
2.4 (1.6–3.6)
158 (53.9)
33 (48.5)
20 (52.6)
  243 (49.0)
134 (43.1)
56 (42.4)
  20 (6.7)**
11 (15.5)
2 (5.3)
1.0
2.0 (0.7–5.4)
0.7 (0.1–3.7)
Sex encounters last 7 days
0–10
11–20
>20
220 (45.1)**
188 (42.9)
122 (36.3)
1.0
1.1 (0.8–1.3)
0.7 (0.6–0.9)
21 (53.9)
38 (53.3)
57 (54.8)
  223 (43.3)*
220 (48.7)
140 (40.7)
1.0
1.1 (0.9–1.4)
0.8 (0.6–1.0)
2 (4.9)
6 (8.3)
12 (11.4)
 
Main partner condom use
Every time
Never or sometimes
No main partner
91 (47.6)**
122 (35.7)
362 (43.6)
1.0
1.3 (1.0–1.8)
0.7 (0.6–1.0)
37 (66.1)**
65 (43.3)
109 (56.5)
1.0
0.5 (0.25–1.02)
0.8 (0.43–1.66)
92 (45.8)
152 (43.3)
386 (44.4)
  14 (9.3)
5 (8.6)
15 (7.5)
 
Client condom use
Every time
Never or sometimes
522 (42.0)
6 (54.6)
  188 (53.1)
9 (40.9)
  578 (44.8)**
1 (7.7)
1.0
0.1 (0.0–0.7)
29 (8.1)
3 (13.0)
 
Times moved in last year
0
1
>1
284 (40.7)
180 (45.6)
111 (41.1)
  167 (50.8)
38 (61.3)
6 (75.0)
  328 (45.0)**
186 (44.8)
116 (41.7)
1.0
1.0 (0.8–1.3)
0.9 (0.7–1.2)
24 (7.1)*
8 (12.5)
2 (25.0)
1.0
1.67 (0.66–4.23)
5.0 (0.77–33.12)
Site received services
Hotel
Clinic
Mobile van
425 (39.2)**
36 (49.3)
66 (55.0)
1.0
1.4 (0.9–2.3)
1.8 (1.2–2.7)
172 (53.3)
1 (100.0)
38 (50.7)
  511 (45.3)
27 (36.0)
55 (44.3)
  27 (8.2)
0 (0.0)
7 (9.1)
 
  1. ***P < 0.001 **P < 0.05 *P = 0.05–0.1
  2. Statistical tests compare distribution of outcomes in each site, does not compare sites.
  3. AOR Adjusted odds ratio
  4. STI Sexually Transmitted Infection