Influence of operator’s experience on complications of root canal treatment using contemporary techniques: a retrospective study

Table 3 Univariate and multivariate analysis of complications

	Univariate analysis		Multivariate analysis
	OR [95% CI]	p	OR [95% CI]	p
Residents	2.151[1.385–3.340]	0.001	2.303[1.355–3.913]	0.002
Molar	2.010[1.303–3.102]	0.002	2.359[1.498–3.715]	<0.001
Root canal retreatment	1.488[0.900- 2.458]	0.121	1.953[1.148–3.324]	0.014
Age	0.986[0.971–1.002]	0.091	0.991[0.975–1.008]	0.312
Using operating microscope during root canal preparation	0.805[0.506–1.282]	0.362	0.752[0.449–1.257]	0.277

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