TABLE 2.
Village pair characteristics at baseline (October 2004), People’s Republic of China*
| Province | Hunan | Jiangxi | ||||||
| Pair | Pair 1 | Pair 2 | Pair 3 | Pair 4 | ||||
| Village status | Control | Intervention | Control | Intervention | Control | Intervention | Control | Intervention |
| Administrative village | Yongxiang | Mengjiang | Jizhong | Yongfu | Dignshan | Aiguo | Fuqian | Xindong |
| Human | ||||||||
| Sample size | 520 | 528 | 707 | 519 | 607 | 762 | 810 | 937 |
| Prevalence | 7.7% (5.4–10.0) | 9.5% (7.0–12.0) | 14.9% (12.2–17.5) | 17.0% (13.7–20.2) | 13.0% (10.3–15.7) | 11.5% (9.3–13.8) | 11.0% (8.8–13.1) | 14.0% (11.8–16.2) |
| Geometric mean epg in infected animals |
7.3 (5.9–9.0) | 8.6 (6.9–10.6) | 9.2 (7.7–11.1) | 12.4 (9.8–15.7) | 26.3 (21.3–32.5) | 12.2 (9.7–15.2) | 10.8 (8.8–13.3) | 27.6 (21.4–35.6) |
| Sex ratio (F/M) | 252/268 | 258/270 | 349/358 | 246/273 | 298/309 | 375/387 | 350/451 | 424/512 |
| Prevalence by sex (F/M) | 6.0/9.3% | 4.7/14.1% | 10.3/19.3% | 17.5/16.5% | 11.8/14.2% | 8.0/15.0% | 8.1/13.3% | 10.6/16.8% |
| Mean age (years) | 41.0 | 42.5 | 40.5 | 41.4 | 36.5 | 35.6 | 37.3 | 35.3 |
| Sentinel cohort no. | 363 | 335 | 467 | 334 | 400 | 467 | 671 | 751 |
| Sentinel cohort prevalence Bovine |
7.7% (5.0–10.5) | 8.7% (5.6–11.7) | 13.9% (10.8–17.1) | 18.9% (14.6–23.1) | 14.2% (10.7–17.6) | 13.1% (10.0–16.1) | 11.9% (9.5–14.4) | 13.8% (11.4–16.3) |
| Sample size | 63 | 59 | 82 | 88 | 564 | 254 | 233 | 230 |
| Prevalence | 25.4% (14.3–36.4) | 28.8% (16.9–40.7) | 29.3% (19.2–39.3) | 18.2% (10.0–26.4) | 11.5% (8.9–14.2) | 14.2% (9.9–18.5) | 15.9% (11.2–20.6) | 12.2% (7.9–16.4) |
| Geometric mean epg in infected animals |
4.9 (2.6–9.3) | 5.5 (2.6–11.7) | 7.2 (5–10.4) | 3.4 (1.8–6.7) | 0.53 (0.43–0.66) | 2.3 (1.8–3) | 1.9 (1.4–2.5) | 0.8 (0.45–1.5) |
| Snail | ||||||||
| Prevalence | 7.04% | 2.2% | 19.65% | 1.24% | 0.87% | 1.4% | 4.05% | 0.24% |
| Density of infected snails per 100 m2 |
5.23 | 14.51 | 56.26 | 46.73 | 6.91 | 35.36 | 18.50 | 2.68 |
| Odds ratio | ||||||||
| Human prevalence | 0.80 (0.52–1.23) | 1.17 (0.86–1.59) | 1.15 (0.83–1.59) | 1.32 (0.99–1.76) | ||||
| Bovine prevalence | 0.84 (0.38–1.87) | 0.54–0.26–1.10) | 0.79 (0.51–1.22) | 0.73 (0.43–1.25) | ||||
*
Values in parentheses are 95% confidence intervals. epg = eggs per gram (of feces).