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Table 2 Number and frequency of apical foramina in mandibular first molars according to sex

From: Cone-beam computed tomography analysis of root canal morphology in mandibular first molars in a Chinese population: a clinical study

Sex

1 (%)

2 (%)

3 (%)

4 (%)

5 (%)

Kappa value

P value

Female (469)

–

64 (13.6%)

260 (55.4%)

145 (30.9%)

–

1.5320

0.4649

Male (431)

–

70 (16.2%)

239 (55.5%)

122 (28.3%)

–

Total (900)

–

134 (14.9%)

499 (55.4%)

267 (29.7%)

–

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