Table 3.

Multiple logistic regression on post-obturation pain incidence after 1 day (n = 538)

Independent variable	Category	Odds ratio	95 % C.I.	p-value
Treatment visit	Single	0.87	0.57 - 1.32	0.50
	Multiple	1
Obturation method	Thermafil	0.38	0.04 - 3.85	0.41
	Lateralcondensation	1
Operator’s experience	<=10 years	0.68	0.07 - 7.12	0.75
	>10 years	1
Apical periodontitis	Yes	0.35	0.21 - 0.57	<0.01*
	No	1
Vitality	Vital	0.67	0.40 - 1.11	0.12
	Non-Vital	1
Pre-operative pain intensity	0–10	1.10	1.03 - 1.18	<0.01*

Nagelkerke R-squared = 0.11;  *Significant result, p < 0.05