Table 2 Baseline characteristics of the 270 female sex workers recruited into the follow-up cohort study, stratified by whether or not they moved to a different city during the study.
| Â | Characteristic | Cohort members who moved (N = 117) Number (%) | Cohort members who did not move (N = 153) Number (%) | Mobility incidence (/100 person months) | Univariate analysis Hazard Risk (95% Confidence Interval) | Multivariate analysis Hazard Risk (95% Confidence Interval) |
|---|---|---|---|---|---|---|
Age (years) | 16-20 | 35 (29.9) | 41 (26.8) | 5.75 | 1.0 | Â |
| Â | 21-25 | 42 (35.9) | 42 (27.4) | 6.00 | 1.04 (0.66-1.63) | 0.95 (0.61-1.50) |
| Â | 26-52 | 40 (34.2) | 70 (45.8) | 4.13 | 0.72 (0.46-1.13) | 0.63 (0.38-1.04) |
Nationality | Han | 83 (70.9) | 107 (69.9) | 5.17 | 1.0 | Â |
| Â | Other | 34 (29.1) | 46 (30.1) | 5.06 | 0.98 (0.66-1.46) | Â |
Registered | Kaiyuan city | 39 (33.3) | 84 (54.9) | 3.67 | 1.0 | Â |
permanent | Other cities in Yunnan | 53 (45.3) | 47 (30.7) | 6.47 | 1.74 (1.15-2.63) | 1.67 (1.09-2.56) |
residence | Outside Yunnan | 25 (21.4) | 22 (14.4) | 6.33 | 1.70 (1.03-2.81) | 1.58 (1.04-2.54) |
Education level | < 9 years | 55 (47.0) | 78 (51.0) | 4.84 | 1.0 | Â |
|  | ≥9 years | 62 (53.0) | 75 (49.0) | 5.44 | 1.13 (0.78-1.62) |  |
Marital status | Married or cohabitation | 37 (31.6) | 48 (31.4) | 5.14 | 1.0 | Â |
| Â | Single, separated, divorced, or widowed | 80 (68.4) | 105 (68.6) | 5.13 | 0.99 (0.67-1.46) | Â |
Earnings per sex | ≤$7 | 14 (12.0) | 30 (19.6) | 3.77 | 1.0 |  |
| Â | $7~$14 | 49 (41.9) | 79 (51.6) | 4.36 | 1.15 (0.64-2.09) | Â |
| Â | > $14 | 54 (46.1) | 44 (28.8) | 6.89 | 1.79 (1.00-3.23) | Â |
Drug use (ever) | Non-drug user | 97 (82.9) | 110 (71.9) | 5.44 | 1.0 | Â |
| Â | Non-injection illegal drug user | 11 (9.4) | 11 (7.2) | 6.20 | 1.12 (0.60-2.08) | 1.34 (0.71-2.54) |
| Â | Injection drug user | 9 (7.7) | 32 (20.9) | 2.84 | 0.52 (0.26-1.02) | 0.72 (0.33-1.54) |
HIV | Negative | 101 (86.3) | 122 (79.7) | 5.31 | 1.0 | Â |
| Â | Positive | 16 (13.7) | 31 (20.3) | 4.24 | 0.80 (0.47-1.36) | 1.12 (0.63-1.99) |
Any STIs | Negative | 26 (22.2) | 22 (14.4) | 6.55 | 1.0 | Â |
| Â | Positive | 91 (77.8) | 131 (85.6) | 4.84 | 0.73 (0.47-1.13) | Â |
Duration of | < 1 year | 31 (26.5) | 40 (26.1) | 5.16 | 1.0 | Â |
commercial sex | 1-2 years | 53 (45.3) | 59 (38.6) | 5.70 | 1.10 (0.70-1.71) | Â |
Work | ≥3 years | 33 (28.2) | 54 (35.3) | 4.42 | 0.85 (0.52-1.39) |  |
Entertainment venue | Higher risk | 35 (29.9) | 72 (47.1) | 3.77 | 1.0 | Â |
| Â | Lower risk | 82 (70.1) | 81 (52.9) | 6.07 | 1.59 (1.07-2.36) | 1.55 (1.03-2.35) |