Table 1.
Characteristics of the study population
| Variables/ states | No. individuals | Proportion in % | |
|---|---|---|---|
| Age (years) | 6–10 | 54 | 12.3 |
| 11–20 | 48 | 11.0 | |
| 21–30 | 66 | 15.1 | |
| 31–40 | 86 | 19.6 | |
| 41–50 | 88 | 20.1 | |
| >50 | 96 | 21.9 | |
| Gender | Male | 172 | 39.3 |
| Female | 266 | 60.7 | |
| Occupation | Worker | 4 | 0.9 |
| Peasant | 370 | 84.5 | |
| Else | 64 | 14.6 | |
| Education | Illiterate | 286 | 65.3 |
| Elementary school and above | 152 | 34.7 | |
| Marital status | Unmarried | 100 | 22.8 |
| First married | 293 | 66.9 | |
| Divorced and other | 45 | 10.3 | |
| Home income (¥yuan, RMB) | <1,000 | 12 | 2.7 |
| 1,000–2,999 | 71 | 16.2 | |
| 3,000–4,999 | 142 | 32.4 | |
| 5,000–9,999 | 75 | 17.1 | |
| ≥10,000 | 138 | 31. | |
| Drug abuse | Yes | 9 | 2.1 |
| No | 429 | 97.9 | |
| Work on farm | Yes | 265 | 60.5 |
| No | 113 | 29.5 | |
| Clean food when eaten raw | Always | 39 | 8.9 |
| Occasionally or never | 372 | 91.1 | |
| Fertilization pattern | Directly | 20 | 4.6 |
| After disposed | 374 | 95.4 | |
| Raised animals | Yes | 338 | 77.2 |
| No | 100 | 22.8 | |
| Wash hands before meals | Always | 5 | 1.2 |
| Occasionally or never | 427 | 98.8 | |
| Source of drinking water | Spring | 415 | 94.7 |
| Other | 23 | 5.3 | |
| Toilets | None | 188 | 42.9 |
| Yes | 250 | 57.1 | |
| Village No. | 1 | 114 | 26.0 |
| 2 | 115 | 26.3 | |
| 3 | 88 | 20.1 | |
| 4 | 121 | 27.6 | |
RMB, Renminbi, the current rate of exchange be 9.66 yuan to 1 pound, i.e., ¥9.66 yuan (RMB) = £1 lb (GBP)