Table 1 Distribution of males and females in different age groups.

From: Prevalence and correlation of C-shaped root canals of mandibular premolars and molars in Eastern Chinese individuals

Age

Males

Females

Sum

 ≤ 20

88 (40.55%)

129 (59.45%)

217

21–30

156 (29.83%)

367 (70.17%)

523

31–40

46 (23.71%)

148 (76.29%)

194

41–50

15 (30.61%)

34 (69.39%)

49

 ≥ 51

3 (17.65%)

14 (82.35%)

17

Sum

308 (30.80%)

692 (69.20%)

1000

P value

0.003

  1. There was a significant difference in the proportion of gender among age groups.
  2. Sum: Summation.
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