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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

  Hookworm A. lumbricoides T. trichiura
  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
  1. a Kruskal-Wallis non-parametric test.