Table 4.

Logistic multiple regression analysis of the factors influencing the duration of discomfort after the use of metal prefabricated crowns

	Time for discomforta	4 ~ 7 Days			1 ~ 2 Weeks			No discomfort
		B	Sig.	Exp(B)	B	Sig.	Exp(B)	B	Sig.	Exp(B)
Annual revenue for family (thousands)	< 10	50.728	0.997	1.074E + 22	−18.127	.	1.341E-8	53.783	.	2.279E + 23
	10–15	−6.897	1.000	0.001	−81.019	0.065*	6.512E-36	−4.545	1.000	0.011
	15–20	−27.662	0.998	9.694E-13	−98.853	0.055*	1.171E-43	−20.958	0.998	7.907E-10
	20–25	18.390	0.999	97009140.006	−43.262	0.985	1.627E-19	25.074	0.998	7.756E + 10
	25 ~ 30	−5.328	1.000	0.005	−61.042	0.060*	3.087E-27	−2.477	1.000	0.084
	> 30	0	.	.	0	.	.	0	.	.
Number of children in the family	1	−16.696	0.040*	5.610E-8	−10.819	0.061*	2.002E-5	−34.035	0.995	1.654E-15
	2	−36.638	0.050*	1.225E-16	−3.796	0.577	0.022	−47.479	0.992	2.400E-21
	3	0	.	.	0	.	.	0	.	.
Number of tooth brushing sessions per day	1	24.512	0.033*	4.422E + 10	38.378	0.046*	4.649E + 16	−25.488	0.036*	1.173E + 11
	2	0	.	.	0	.	.	0	.	.
Parents helping children with tooth brushing	Yes	−13.576	0.051*	1.270E-6	−2.795	0.336	0.061	−1.446	0.461	0.235
	No	0	.	.	0	.	.	0	.	.
Frequency of sweet consumption	Rarely/never	5.474	0.200	238.472	−24.485	0.074*	2.323E-11	−35.840	0.991	2.722E-16
	1 ~ 2 times per month	−58.213	0.980	5.231E-26	−18.038	0.097*	1.466E-8	−56.251	0.983	3.719E-25
	1 time per week	−10.934	0.057*	1.783E-5	7.050	0.282	1152.510	−0.970	0.751	0.379
	2 ~ 6 times per week	−46.134	0.057*	9.207E-21	−15.942	0.083*	1.193E-7	−55.624	0.982	6.960E-25
	1 time per day	−5.410	0.319	0.004	11.346	0.258	84629.555	10.993	0.273	59464.900
	≥ 2 times per day	0	.	.	0	.	.	0	.	.
Understanding of oral health	0	−2.547	0.643	0.078	−15.675	0.145*	1.557E-7	18.999	0.995	178241676.577
	1	7.719	0.070*	2251.334	−16.775	0.127*	5.187E-8	34.855	0.991	1.372E + 15
	2	19.988	0.079*	479191658.591	−71.858	0.060*	6.204E-32	30.136	0.992	1.225E + 13
	3	−5.170	0.401	0.006	−56.411	0.055*	3.171E-25	8.647	0.998	5695.225
	4	56.495	0.993	3.430E + 24	−37.110	0.996	7.642E-17	47.444	0.996	4.023E + 20
	5	−15.806	0.998	1.366E-7	−53.561	0.065*	5.477E-24	11.179	0.999	71612.957
	6	0	.	.	0	.	.	0	.	.
Understanding of methods of restoration	No understanding	7.156	0.170	1281.326	26.346	0.047*	2.765E + 11	13.598	0.089*	804708.324
	Basic understanding	14.438	0.065*	1862984.236	−10.989	0.138*	1.689E-5	3.530	0.270	34.128
	Understand a lot	0	.	.	0	.	.	0	.	.
① * Indicating a significance level of 0.15; ② a. Reference category: 1~3 days