Table 2 Prevalence of soil-transmitted helminths among school children in north-western Tanzania categorized by age and sex
Variable | Hookworm | Chi-2, P-value | Ascaris lumbricoides | Chi-2, P-value | Trichuris trichiura | Chi-2, P-value | |||
|---|---|---|---|---|---|---|---|---|---|
Positive | Negative | Positive | Negative | Positive | Negative | ||||
Sex | |||||||||
 Female | 6.1% (266) | 93.8% (4079) | χ2(1) = 0.1715, P = 0.7 | 2.7% (118) | 97.3% (4227) | χ2(1) = 0.8693, P = 0.35 | 1.4% (61) | 98.6% (4284) | χ2(1) = 0.6207, P = 0.43 |
 Male | 6.3% (272) | 93.6% (4020) | 3.1 (131) | 96.9% (4162) | 1.2% (52) | 97.7% (4241 | |||
Age groups (years) | |||||||||
 9–10 | 4.5% (143) | 95.5% (3013) | χ2(1) = 24.5476, P = 0.001 | 3.9% (122) | 96.1% (3034) | χ2(1) = 17.1661, P = 0.001 | 1.7% (54) | 98.3% (3102) | χ2(1) = 6.2511, P = 0.01 |
 11–13 | 7.2% (315) | 92.7% (5086) | 2.3% (127) | 97.6% (5355) | 1.1% (59) | 98.9% (5423) | |||