Table 3.

Prognostic factors affecting treatment outcome

		Final outcome								Chi-square
		Healed		Healing		Persistent disease		Total
		n	%	n	%	n	%	n	%	Chi-square	P
Presence of post	Presence	18	81.8	1	4.5	3	13h6	22	100	M	0.605
	Absence	81	90	2	2.2	7	7.8	90	100
	Total	99	88.4	3	2.7	10	8.9	112	100
Preoperative status of root canal filling	Good	38	82.6	2	4.3	6	13	46	100.0	M	0.307
	Not good	61	92.4	1	1.5	4	6.1	66	100.0
	Total	99	88.4	3	2.7	10	8.9	112	100.0
Apical resurgery	Re-surgery	16	80	1	5	3	15	20	100	M	0.436
	First surgery	83	90.2	2	2.2	7	7.6	92	100
	Total	99	86.4	3	2.1	10	8.9	112	100
Previous initial endodontic treatment or retreatment	First treatment	64	90.1	2	2.8	5	7	71	100	M	0.771
	Retreatment	35	85.4	1	2.4	5	12.2	41	100
	Total	99	88.4	3	2.7	10	8.9	112	100
Histopathological examination	Granuloma	46	86.8	1	1.9	6	11.3	53	100	M	0.534
	Cyst	23	85.2	2	7.4	2	7.4	27	100
	Other	8	80	0	0	2	20	10	100
	Total	77	85.6	3	3.3	10	11.1	90	100
Preoperative signs and symptoms	Presence	39	83	2	4.3	6	12.8	47	100	M	0.348
	Absence	60	92.3	1	1.5	4	6.2	65	100
	Total	99	88.4	3	2.7	10	8.9	112	100