Table 3.

Logistics regression result

Variables	β	SE	OR(95%CI)	P value
(Intercept)	−0.825	0.396	0.438 (0.194, 0.930)	0.038
Female	−0.186	0.235	0.830 (0.523, 1.313)	0.427
Age
< 20 years old	2.597	0.593	13.425 (4.439, 46.245)	0.000
20–39 years	1.910	0.400	6.754 (3.172, 15.354)	0.000
40–59 years	1.295	0.391	3.652 (1.741, 8.168)	0.001
≥ 60 years	reference
Position right	−0.084	0.236	0.920 (0.579, 1.461)	0.722
Separated distal-lingual root canal	−0.908	0.294	0.403 (0.225, 0.713)	0.002