Table 3 Distribution of helminth survey data, over the three transmission categories
From: The global limits and population at risk of soil-transmitted helminth infections in 2010
| Â | Hookworm | A. lumbricoides | T. trichiura | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Â | n | Median prevalence (range) | P a | n | Median prevalence (range) | P a | n | Median prevalence (range) | P a |
Point-level survey data | |||||||||
 Within limits | 5,157 | 0.1 (0, 1) |  | 4,889 | 0.08 (0, 1) |  | 4,891 | 0.03 (0, 1) |  |
 Unstable transmission | 228 | 0 (0, 0.14) |  | 437 | 0 (0, 0.36) |  | 436 | 0 (0, 0.16) |  |
 Beyond limits | 14 | 0 (0, 0.02) | <0.001 | 73 | 0 (0, 0.04) | <0.001 | 72 | 0 (0, 0.03) | <0.001 |
District-level survey data | |||||||||
 Within limits | 1,351 | 0.001 (0, 1) |  | 1,441 | 0.03 (0, 1) |  | 1,419 | 0.06 (0, 1) |  |
 Unstable transmission | 32 | 0.001 (0, 0.06) |  | 33 | 0.001 (0, 0.03) |  | 29 | 0.001 (0, 0.02) |  |
 Beyond limits | 0 | – | <0.001 | 25 | 0.001 (0, 0.04) | <0.001 | 21 | 0 (0, 0.01) | <0.001 |