Variable RR 95% CI All (n=180) 2.88 1.43-5.81 Boys  (n=92) 1.56 0.27-8.94 Girls (n=88) 3.13 1.50-6.55 Analysis of M-H 2.80 1.43-5.48

Table 4: The analysis of Mantel Haenszel on sex and the incidence of urinary tract infection related to the duration of using diaper