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. 2020 May 5;22(5):e15685. doi: 10.2196/15685

Table 3.

Model robustness test.

Variables	Model 1^a		Model 2^a		Model 3^a		Model 4^a		Model 5^b		Model 6^b
	β (SE)	P value	β (SE)	P value	β (SE)	P value	β (SE)	P value	β (SE)	P value	β (SE)	P value
Intercept	68.062 (22.366)	.002	46.429 (23.563)	.05	15.961 (26.411)	.55	–13.749 (28.299)	.63	18.724 (3.320)	<.001	16.429 (3.999)	<.001
Phy_Style	0.767 (0.146)	<.001	0.741 (0.150)	<.001	0.737 (0.149)	<.001	0.748 (0.149)	<.001	0.017 (0.021)	.42	0.017 (0.021)	.42
Ques_comp	0.207 (0.049)	<.001	0.205 (0.049)	<.001	0.205 (0.049)	<.001	0.207 (0.049)	<.001	0.021 (0.007)	.003	0.021 (0.007)	.003
Title	–1.896 (2.510)	.45	–2.243 (2.516)	.37	–2.46 (2.515)	.33	–2.309 (2.509)	.36	–0.098 (0.355)	.78	–0.101 (0.355)	.78
Hospital_Level	1.230 (3.136)	.70	2.390 (3.178)	.45	2.413 (3.174)	.45	1.838 (3.172)	.56	–3.344 (0.448)	<.001	–3.365 (0.448)	<.001
Recommendation	–7.621 (6.423)	.24	–6.587 (6.415)	.31	–7.014 (6.409)	.27	–6.048 (6.398)	.35	–2.377 (0.904)	.009	–2.356 (0.904)	.009
Patient_Number	–3.328 (1.599)	.04	2.857 (2.668)	.28	3.177 (2.668)	.23	3.591 (2.667)	.18	–0.923 (0.376)	.01	–0.895 (0.377)	.02
Gift_Price	N/A^c	N/A	2.720 (1.301)	.04	15.032 (5.014)	.003	24.929 (5.964)	<.001	0.939 (0.183)	<.001	1.786 (0.843)	.03
Service_Price	N/A	N/A	–3.954 (1.547)	.01	–4.110 (1.547)	.008	10.139 (4.004)	.01	0.584 (0.218)	.007	1.122 (0.566)	.05
Gift_Number	N/A	N/A	–3.675 (1.849)	.05	2.254 (2.975)	.45	–4.391 (1.853)	.02	–0.322 (0.260)	.22	–0.349 (0.262)	.18
Gift_NumberGift_Price	N/A	N/A	N/A	N/A	–2.374 (0.934)	.01	N/A	N/A	N/A	N/A	N/A	N/A
Service_PriceGift_Price	N/A	N/A	N/A	N/A	N/A	N/A	–5.493 (1.440)	<.001	N/A	N/A	–0.210 (0.203)	.30

^aInformation support.

^bEmotional support.

^cN/A: not applicable; the variable was not included in the model.