| Characteristics | Frequency (%) |
| Demographic data | |
| Age | |
| <20 years | 2 (0.7%) |
| 20 - 39 years | 115 (42.0%) |
| 40 - 59 years | 127 (46.4%) |
| ≥ 60 years | 30 (10.9%) |
| Truck driving years | |
| 1 - 5 years | 47 (17.2%) |
| ≤10 years | 74 (27.0%) |
| >10 years | 153 (55.8%) |
| Marital status |
|
| Married | 212 (77.4%) |
| Living together | 3 (1.1%) |
| Single | 53 (19.3%) |
| Divorced or widow | 6 (2.2%) |
| Behavioral characteristics | |
| History of sex outside of marriage |
|
| Yes | 94 (34.3%) |
| No | 180 (65.7%) |
| Current number of sexual partner (casual or sex worker), n = 94 |
|
| One sexual partner* | 35 (37.2%) |
| Two or more sexual partners* | 40 (42.6%) |
| Casual partner | 19 (20.2%) |
| Using condom during the past six months |
|
| Yes | 2 (0.7%) |
| No, I and my partner are free from STDs | 120 (43.8%) |
| No, without reason | 119 (43.4%) |
| No, I don't know | 33 (12.0%) |
| Early sexual debut |
|
| ≤18 years at first sex | 3 (1.1%) |
| >18 years at first sex | 160 (58.4%) |
| I didn’t remember | 105 (38.3%) |
| No | 6 (2.2%) |
| Screening of STDs (HIV/HBV) in previous 6 months |
|
| Yes | 8 (2.9%) |
| No | 266 (97.1%) |
| If you are positive to (HIV/HBV), do you stop having sex |
|
| Yes | 8 (2.9%) |
| No | 265 (96.7%) |
| If you are positive to (HIV/HBV), do you till your spouses or causal partners? |
|
| Yes | 150 (54.7%) |
| No | 124 (45.3%) |
| Substance use habits | |
| Alcoholic drink use |
|
| Yes | 39 (14.2%) |
| No | 235 (85.8%) |
| Recreational drug use |
|
| Yes | 3 (1.1%) |
| No | 271 (98.9%) |
| Cigarette smoke use |
|
| Yes | 245 (89.4%) |
| No | 29 (10.6%) |
| Tobacco snuff use |
|
| Yes | 243 (88.7%) |
| No | 31 (11.3%) |