Table 1 Concurrent WaSt prevalence by age categories, the amount of difference, prevalence ratio between original and proposed case-definitions (N = 9854 children)

 6–17 (2456)

2.44% (60) (1.90–3.13)

5.21% (128) (4.40–6.16)

2.77% (1.70–3.84)

2.13 (1.58–2.89)

 18–29 (2448)

1.87% (46) (1.41–2.50)

3.83% (94) (3.14–4.67)

1.96% (1.03–2.89)

2.04 (1.44–2.89)

 30–41 (2379)

0.58% (14) (0.35–0.98)

1.30% (31) (0.91–1.84)

0.71% (0.16–1.24)

2.21 (1.81–4.15)

 42–53 (1900)

0.31% (6) (0.14–0.68)

0.57% (11) (0.32–1.03)

0.26% (− 0.16–0.69)

1.83 (0.68–4.94)

 54–59 (671)

0.44% (3) (0.15–1.30)

0.59% (4) (0.23–1.52)

0.15% (− 0.62–0.92)

1.33 (0.30–5.93)