Age

(years)

N

Normal

(pH₂₄ < 5.8)

DFD

(pH₂₄ ≥ 5.8)

Chi-square

P-value

2 - 3

13

7 (53.85%)

6 (46.15%)

0.16

0.69

3 - 6

14

12 (85.71%)

2 (14.29%)

6 - 9

12

8 (66.67%)

4 (33.33%)

Total

39

27 (69.23%)

12 (30.77%)