Table 5 Multivariate analysis for relationships among operation time and the endodontic case difficulty factors
Factors | β | P value | 95% CI | R2 |
|---|---|---|---|---|
Emergency condition | ||||
Minimum pain or swelling (Ref) | 4.24 | 0.48 | −7.49, 15.98 | |
Moderate pain or swelling | ||||
Radiographic difficulties | ||||
Minimal (Ref) | 10.44 | 0.08 | −1.44, 22.32 | |
Moderate | ||||
Tooth position | ||||
None of slight inclination or rotation < 10° (Ref) | 24.57 | < 0.01 | 17.62, 31.52 | |
1st, 2nd, or 3rd molar, or rotation or inclination ≥ 10° | ||||
Crown morphology | ||||
None of complication (Ref) | 10.93 | < 0.01 | 6.09, 15.76 | 0.59 |
Moderate or severe complication | ||||
Canal and Root morphology | ||||
Slight or no curvature < 10°, Closed apex (Ref) | 9.26 | < 0.01 | 2.93, 15.58 | |
Moderate or extreme curvature ≥ 10°, Open apex | ||||
Canal appearance | ||||
Not reduced (Ref) | 4.51 | 0.11 | −1.07, 10.09 | |
Visible but reduced or indistinct or not visible | ||||
Perio-Endo condition | ||||
None or mild periodontal disease (Ref) | 2.46 | 0.59 | −6.50, 11.42 | |
Moderate periodontal disease | ||||