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Table 2 The number and proportion of males within specific time interval from chronological and dental age (CA-DA)

From: Dental age estimation in southern Chinese population using panoramic radiographs: validation of three population specific reference datasets

Time
intervals
Datasets Chi-square
test
French-Canadian UK Caucasian Southern Chinese
  n (%) n (%) n (%) p
3 months 10 (13%) 18 (15%) 24 (19%) 0.001*
6 months 21 (27%) 42 (34%) 57 (45%) 0.022*
9 months 34 (44%) 61 (49%) 86 (68%) 0.001*
12 months 44 (56%) 74 (60%) 101 (80%) 0.001*
18 months 60 (77%) 89 (72%) 114 (90%) 0.001*
24 months 71 (91%) 106 (85%) 124 (98%) 0.001*
30 months 74 (95%) 114 (92%) 126 (100%) 0.006*
Total 78 (100%) 124 (100%) 126 (100%)
  1. *statistically significant value, p < 0.05