From: Dynamics of freshwater snails and Schistosoma infection prevalence in schoolchildren during the construction and operation of a multipurpose dam in central Côte d’Ivoire
2007
2009
Age category (in years)
n
p (%)
χ 2
P-value
≤5
38
3 (7.9)
36
1 (2.7)
6–15
198
23 (11.6)
140
4 (3.0)
>15
315
12 (3.8)
183
3 (1.6)
Total
551
38 (6.9)
372
8 (2.2)
7.40
0.006