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Table 1 Comparison between demographic and behavioural characteristics of 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

  JOHANNESBURG PRETORIA ODDS RATIO P value
N = 1422 N (%) N = 408 N (%)   
HIV positive total population 575/1364 (42.2) 211/399 (52.9) 0.6 (0.5–0.8) <0.001
*South Africans 210/593 (35.4) 80/158 (50.6)
*Zimbabweans 286/589 (48.5) 123/229 (58.3)
*Other origin 79/181(43.6) 8/12 (66.7)
Previous STI** 630/1422 (44.3) 34/408 (8.3) 8.8 (6.0–13.0) <0.001
Use modern contraception 187/1422 (15.1) 62/408 (15.2) 0.9 (0.6–1.2) 0.288
No child dependents 281/1401 (20.1) 61/399 (15.3) 1.4 (1.0–1.9) 0.032
Age (years)
 <25 340/1422 (23.9) 43/404 (10.6) 2.6 (1.9–3.8) <0.001
 25–29 517/1422 (36.4) 92/404 (22.8) 1.9 (1.5–2.5)
 30–34 369/1422 (26.0) 128/404 (31.7) 0.8 (0.6–1.0)
 35+ 196/1422 (13.8) 141/404 (34.9) 0.3 (0.2–0.4)
Education
 Primary 46/1414 (3.3) 61/406 (15.0) 0.2 (0.1–0.3) <0.001
 Grade 8–10 490/1414 (34.7) 180/406 (44.3) 0.7 (0.5–0.8)  
 Grade 11–12 808/1414 (57.1) 146/406 (36.0) 2.4 (1.9–3.0)  
 Tertiary level 70/1414 (5.0) 19/406 (4.7) 1.1 (0.6–1.9)  
Have a main partner 693/1422 (48.7) 221/406 (54.4) 0.8 (0.6–1.0) 0.043
>1 child lives with sex worker 163/1233 (13.2) 101/408 (24.8) 0.5 (0.3–0.6) <0.001
≥3 dependent adults 456/1398 (32.6) 153/400 (38.3) 0.8 (0.6–1.0) 0.036
Country of birth
 South Africa 621/1422 (43.7) 234/408 (59.1) 0.6 (0.5–0.7) <0.001
 Zimbabwe 610/1422 (42.9) 162/408 (39.7) 1.1 (0.9–1.4)  
 Other 191/1422 (13.4) 12/408 (2.9) 5.1 (2.9–10.2)  
Alcohol use 977/1314 (74.4) 221/390 (56.7) 2.2 (1.7–2.8) <0.001
Marijuana use 92/1314 (7.0) 32/390 (8.2) 0.8 (0.5–1.3) 0.422
Years in sex work
 <2
 2–5
 >5
496/939 (52.8)
311/939 (33.1)
132/939 (14.1)
298/407 (73.2)
71/407 (17.4)
38/407 (9.3)
0.4 (0.3–0.5)
2.3 (1.7–3.2)
1.6 (1.1–2.4)
<0.001
Sex encounters past 7 days
 0–10 515/1311 (39.3) 41/218 (18.8) 2.8 (2.0–4.1) <0.001
 11–20 452/1311 (34.5) 72/218 (33.0) 1.1 (0.8–1.5)
 >20 344/1311 (26.2) 105/218 (48.2) 0.4 (0.3–0.5)
Consistent condom use: main partner 201/1422 (14.1) 58/208 (27.9) 0.4 (0.3–0.6) <0.001
Consistent condom use: clients 1289/1302 (99.0) 359/382 (94.0) 6.4 (3.0–13.8) <0.001
Times moved house past year
 0 729/1422 (51.3) 336/408 (82.4) 0.2 (0.2–0.3) <0.001
 1 415/1422 (29.2) 64/408 (15.7) 2.2 (1.6–3.0)
 2 278/1422 (19.6) 8/408 (2.0) 24.3 (9.3–90.3)
Site receives services
 Hotel 1129/1328 (85.0) 329/408 (80.6) 1.4 (1.0–1.8) <0.001
 Clinic 75/1328 (5.7) 2/408 (0.5) 12.2 (3.2–102.5)
 Mobile vans 124/1328 (9.3) 77/408 (18.9) 0.4 (0.3–0.6)
  1. Numbers in brackets give the proportion of the total population. N could differ across rows because of missing data.
  2. Adjusted Odds Ratio (AOR) and accompanying P value is provided for each sub group, compared to the rest of the group, thus, for example, the proportion working in a hotel is compared to women working in all other settings
  3. *Breakdown of positivity rate by country
  4. STI Sexually Transmitted Infection