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Table 1 Demographic characteristics of female sex workers in the follow-up cohort study.

From: Mobility, risk behavior and HIV/STI rates among female sex workers in Kaiyuan City, Yunnan Province, China

Demographics Recruited in the cohort study P value
   Yes (N = 270) No (N = 467)  
Age (years) 16-20 76 (28.2) 149 (31.9) 0.0388
  21-25 84 (31.1) 171 (36.6)  
  26-52 110 (40.7) 147 (31.5)  
Nationality Han 190 (70.4) 302 (64.7) 0.1134
  Other 80 (29.6) 165 (35.3)  
Registered permanent residence Kaiyuan city 123 (45.6) 174 (37.3) 0.0826
  Other cities in Yunnan 100 (37.0) 195 (41.7)  
  Outside Yunnan 47 (17.4) 98 (21.0)  
Education level < 9 years 133 (49.3) 254 (54.4) 0.1790
  ≥9 years 137 (50.7) 213 (45.6)  
Marital status Married or cohabitation 85 (31.5) 140 (30.0) 0.6695
  Single, separated, divorced, or widowed 185 (68.5) 327 (70.0)  
Earnings per sex ≤$7 44 (16.3) 65 (13.9) 0.6586
  $7~$14 128 (47.4) 232 (49.7)  
  > $14 98 (36.3) 170 (36.4)  
Entertainment venue Lower risk 163 (60.4) 295 (63.2) 0.4504
  Higher risk 107 (39.6) 172 (36.8)  
Drug use (ever)* Non-drug user 207 (76.7) 410 (87.8) < .0001
  Non-injection illegal drug user 22 (8.2) 29 (6.2)  
  Injection drug user 41 (15.2) 28 (6.0)  
HIV* Negative 223 (82.6) 438 (93.8) < .0001
  Positive 47 (17.4) 29 (6.2)  
Syphilis Negative 246 (91.1) 436 (93.4) 0.2626
  Positive 24 (8.9) 31 (6.6)  
N. gonorrhoeae Negative 247 (91.5) 429 (91.9) 0.8563
  Positive 23 (8.5) 38 (8.1)  
C. trachomatis Negative 206 (76.3) 340 (72.8) 0.2973
  Positive 64 (23.7) 127 (27.2)  
T. vaginalis Negative 241 (89.3) 418 (89.5) 0.9159
  Positive 29 (10.7) 49 (10.5)  
HSV-2 Negative 75 (27.8) 160 (34.3) 0.0688
  Positive 195 (72.2) 307 (65.7)  
  1. *All self-reported drug users, urine drug positive subjects, or HIV positive subjects from the baseline survey were recruited into the cohort study.