Table 6 Multinomial logistic regression analyses of the frequencies of complicated canals and C-shaped canals in mandibular first premolars
Explanatory variables (test category/reference category) | Multinomial logistic regression analyses | |||
|---|---|---|---|---|
Complicated canal | C-shaped canal | |||
Odds ratio (95% CI) | P value | Odds ratio (95% CI) | P value | |
Sex (male/female) | 2.166 (1.520–3.087) | < 0.001* | 3.039 (1.404–6.580) | 0.005* |
Age (per year) | 0.991 (0.973–1.009) | 0.324 | 0.969 (0.929–1.010) | 0.136 |
Side (left/right) | 1.042 (0.736–1.475) | 0.817 | 0.740 (0.356–1.537) | 0.419 |
DLRs in M1 s (yes/no) | 1.376 (0.933–2.019) | 0.107 | 2.616 (1.257–5.443) | 0.010* |