Key sociodemographic characteristics, drug-related practices, sexual activities following drug consumption and prevalence of confirmed HIV, HCV and syphilis infections among IDU in Southwest China
| Drug type | Heroin only | Poly-drug use | SD only | P values |
| 295 | 277 | 38 | ||
| Demographic characteristics | ||||
| Gender | 0.42 | |||
| Male | 270 (91.5%) | 249 (89.9%) | 32 (84.2%) | |
| Female | 25 (8.5%) | 28 (10.1%) | 6 (15.8%) | |
| Mean age | 35.1±8.3 | 33.8±7.8 | 29.1±7.2 | 0.03 |
| Married status | 0.12 | |||
| Single/divorced | 182 (61.7%) | 183 (66.1%) | 20 (52.6%) | |
| Married/cohabitation | 113 (38.3%) | 94 (33.9%) | 18 (47.4%) | |
| Education | 0.41 | |||
| Junior high or below | 268 (90.8%) | 261 (94.2%) | 35 (92.1%) | |
| Senior high or above | 27 (9.2%) | 16 (5.8%) | 3 (7.9%) | |
| Drug-related practices | ||||
| Injection frequency (times/day) | 2.2±0.8 | 3.3±1.2 | 1.2±0.4 | <0.01 |
| Percentage of syringe sharing | <0.01 | |||
| Yes | 107 (36.3%) | 145 (52.3%) | 21 (55.3%) | |
| No | 188 (63.7%) | 132 (47.7%) | 17 (44.7%) | |
| Sexual activities associated with drug consumption | ||||
| Any sexual acts (previous 1 month) | 0.01 | |||
| Yes | 132 (44.7%) | 176 (63.5%) | 33 (86.8%) | |
| No | 163 (55.3%) | 101 (36.5%) | 5 (13.2%) | |
| Consistent condom usage in any sexual acts (previous 1 month) | 0.01 | |||
| Yes | 85 (64.4%) | 142 (80.7%) | 15 (45.5%) | |
| No | 47 (35.6%) | 34 (19.3%) | 18 (54.5%) | |
| Commercial sexual acts (previous 12 months) | <0.01 | |||
| Yes | 103 (34.9%) | 165 (59.6%) | 29 (76.3%) | |
| No | 192 (65.1%) | 112 (40.4%) | 9 (23.7%) | |
| Consistent condom use in commercial sexual acts (previous 12 months) | <0.01 | |||
| Yes | 64 (62.1%) | 109 (66.1%) | 14 (48.3%) | |
| No | 39 (37.9%) | 56 (33.9%) | 15 (51.7%) | |
| Having sex with fixed partner (previous 12 months) | 0.29 | |||
| Yes | 89 (78.8%) | 72 (76.6%) | 13 (72.2%) | |
| No | 24 (21.2%) | 22 (23.4%) | 5 (27.8%) | |
| Consistent condom use with fixed partner (previous 12 months) | <0.01 | |||
| Yes | 22 (24.7%) | 6 (8.3%) | 1 (7.7%) | |
| No | 67 (75.3%) | 66 (91.7%) | 12 (92.3%) | |
| Confirmed infections | ||||
| HIV infection | 0.02 | |||
| Positive | 27 (9.2%) | 37 (13.4%) | 0 (0.0%) | |
| Negative | 268 (90.8%) | 240 (86.6%) | 38 (100.0%) | |
| HCV infection | <0.01 | |||
| Positive | 210 (71.2%) | 183 (66.1%) | 15 (39.5%) | |
| Negative | 85 (28.8%) | 94 (33.9%) | 23 (60.5%) | |
| Syphilis infection | <0.01 | |||
| Positive | 4 (1.3%) | 6 (2.2%) | 3 (7.9%) | |
| Negative | 291 (98.7%) | 271 (97.8%) | 35 (92.1%) |
HCV, hepatitis C virus; IDU, injection drug user; SD, synthetic drug.