Table 2.

Basic information of primary anterior teeth and univariate analysis results.

Factors		Censored	Failed	P∗
Age (year)		350	242	0.078
Gender	Boy	191	128	0.278
	Girl	160	113
Attending doctors	Intern	25	40	0.002
	Expert	326	201
Treatment method	GA	278	150	0.001
	Non-GA	73	91
Periapical lesion	No	278	154	0.000
	Yes	73	87
Root canal filling materials	Iodoform zinc oxide paste	245	138	0.015
	Vitapex®	106	103
Crown restoration materials	Resin filling	338	243	-a
	GIC filling	8	3

∗Analyzed by Cox regression analysis, and the bold P value indicated that the difference was significant (P < 0.05).

GA, general anesthesia; GIC, glass ionomer cement; non-GA, non-general anesthesia.

^aThe difference in sample size between the two groups was large, and no statistical test was conducted.