Table 1

Demographic characteristics and behaviours of participants in the two rounds of the biobehavioural survey of FSWs in Iran

Variables2010 survey (n=745)†2015 survey (n=1337)P value*
Age group0.002
 <2524.3 (17.0 to 33.5)‡10.3 (7 to 14.8)
 ≥2575.7 (66.5 to 83.0)89.7 (85.2 to 93)
Mean age31.6 (29.7 to 33.6)35.4 (33.9 to 36.8)0.001
Highest educational level0.372
 Illiterate14.7 (8.8 to 23.4)10.0 (7.6 to 13.1)
 Primary or below30.1 (21.8 to 39.8)27.9 (22.2 to 34.4)
 Middle or high school51.0 (40.5 to 61.5)55.7 (50.3 to 61)
 College and above4.2 (1.9 to 9.7)6.4 (4.2 to 9.6)
Current marital status<0.001
 Single19.8 (12.6 to 29.7)6.3 (4.2 to 9.4)
 Married35.9 (25.6 to 47.8)33.0 (25.8 to 41.1)
 Divorced/widowed33.9 (27.6 to 41.0)45.3 (38.4 to 52.4)
 Temporarily married (Sigheh)10.4 (6.8 to 15.4)15.4 (12.4 to 19.1)
Received free male condom in the last year0.110
 Yes63.6 (50.8 to 74.7)74.4 (64.8 to 82.1)
 No36.4 (25.3 to 49.2)25.6 (17.9 to 35.2)
Frequency of male condom use with all sex partners in the last month0.595
 Never29.5 (20.6 to 40.4)23.7 (15.4, 34.7)
 Occasionally44.4 (36.6 to 52.4)50.0 (42.7 to 57.4)
 Always26.1 (18.0 to 36.2)26.3 (20.4 to 33.1)
Age at first sex work debut0.195
 <153.0 (1.6 to 5.4)2.2 (1.4 to 3.7)
 15–1923.0 (16.5 to 31.2)16.7 (11.5 to 23.7)
 20–2428.6 (24.0 to 33.5)26.9 (22.6 to 31.8)
 25+45.4 (35.21 to 56.1)54.1 (46.2 to 61.8)
Number of clients in the last month0.158
 029.1 (20.2 to 40.1)22.5 (13.9 to 34.3)
 124.3 (19.1 to 30.3)14.2 (9.4 to 20.8)
 2–518.0 (12.7 to 42.8)33.4 (24.9 to 43.0)
 6+28.6 (19.1 to 40.6)30.0 (17.2 to 46.9)
Number of non-paying sex partner in the last month0.016
 051.5 (40.2 to 62.7)47.6 (39 to 56.4)
 120.1 (16.3 to 24.6)40.5 (33.1 to 48.3)
 2–525.5 (17.0 to 36.3)11.2 (5.7 to 20.7)
 6+2.9 (1.2 to 6.6)0.8 (0.1 to 5.9)
Lifetime non-injection drug use0.112
 Yes71.6 (59.5 to 81.3)59.8 (47.1 to 71.4)
 No28.4 (18.7 to 40.5)40.2 (28.6 to 52.9)
Lifetime injection drug use0.003
 Yes14.6 (10.1 to 20.6)6.1 (4.4 to 8.4)
 No85.4 (79.4 to 89.9)93.9 (91.6 to 95.6)
  • *P values are for tests to compare the distribution of variables between the two rounds.

  • †Out of 1005 FSWs who participated in the survey, 745 had confirmed HIV test results.

  • ‡Estimates are expressed as % (95% CIs), unless otherwise specified.

  • FSWs, female sex workers.