Table 4 End-of-season prevalence of infection in study villages where at least one clinical case was reported

Infection prevalence

 2018 (all clusters)

0.9% (14/1629)

1.4% (20/1399)

0.51 (0.18, 1.41), p = 0.194

 North bank

0.2% (2/952)

0.1% (1/726)

1.64 (0.14, 18.1), p = 0.688

 South bank

1.8% (12/677)

2.8% (19/673)

0.61 (0.29, 1.26), p = 0.182

2017

1.2% (12/975)

2.4% (32/1322)

0.51 (0.25, 1.05) p = 0.07

 Combined both seasons

1.0% (26/2604)

1.9% (52/2721)

0.51 (0.3, 0.86) p = 0.013

By age

 Under 5 years

0.5% (2/368)

3.9% (15/382)

0.12 (0.02, 0.58), p = 0.009

 5–14 years

0.8% (8/1072)

1.2% (14/1140)

0.59 (0.21, 1.64), p = 0.311

 15–30 years

1.9% (8/428)

2.5% (10/403)

0.71 (0.24, 2.1), p = 0.532

 Above 30 years

1.1% (8/736)

1.6% (13/795)

0.61 (0.22, 1.75), p = 0.361