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Table 1 Number and frequency of roots 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 root (%)

2 roots (%)

3 roots (%)

Additional (%)

Kappa value

P value

Female (469)

–

344 (73.3%)

125 (26.7%)

–

1.2372

0.2660

Male (431)

–

330 (76.6%)

100 (23.2%)

1 (0.2%)

Total (900)

–

674 (74.9%)

225 (25.0%)

1 (0.1%)

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