Effect of infection by any STH species and by multiple STH species on the percentage of schooldays absent during a four-month follow-up period, as estimated by two different hierarchical linear regression models.

Numbers in parentheses represent 95% confidence intervals.
* Statistically significant effect at a confidence level of α = 0.05

括号内的数值代表95%置信区间（95% confidence intervals）。
* 在α=0.05的置信水平下具有统计学显著效应