Table 1.
Comparison between demographic and behavioural characteristics of sex workers in Johannesburg and Pretoria
| 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) | |
Numbers in brackets give the proportion of the total population. N could differ across rows because of missing data.
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
*Breakdown of positivity rate by country
STI Sexually Transmitted Infection