Table 4.

Results of logistic hierarchical regression.

Variable			Model 1				Model 2				Model 3
			Value		P value		Value		P value		Value		P value
Independent variablea
	Response load	N/Ab		N/A		−0.1236c		<.001		−0.1715c		<.001
	Detailed expression	N/A		N/A		0.0665d		<.05		−0.0081		.82
	Emotional comfort	N/A		N/A		0.4709c		<.001		0.5494c		<.001
Interaction terms
	Free service × response load	N/A		N/A		N/A		N/A		0.2481c		<.001
	Free service × detailed expression	N/A		N/A		N/A		N/A		0.3378c		<.001
	Free service × emotional comfort	N/A		N/A		N/A		N/A		−0.4484c		<.001
Control variable
	Gender	−0.1802c		<.001		−0.1830c		<.001		−0.1811c		<.001
	Age	0.0479e		<.01		0.0457e		<.01		0.0487e		<.01
	Neurology department	0.0759		.12		0.1779e		<.01		0.2265c		<.001
	Dermatology department	−0.0927		.07		0.0734		.21		0.1830		.77
	Traditional Chinese Medicine department	0.0908		.11		0.0766		.19		0.0501		.39
	Respiratory and critical care medicine department	−0.2626c		<.001		−0.0104		.89		0.0544		.46
	Endocrinology department	0.1131		.11		0.1146		.10		0.0792		.26
	Endorenal rheumatology department	−0.4609c		<.001		−0.4550c		<.001		−0.4714c		<.001
	Patient’s residence	0.0084		.83		0.0162		.68		0.0255		.51
	Symptom description	0.2650c		<.001		0.2513c		<.001		0.2426c		<.001
	Interaction frequency	0.7135c		<.001		0.6891c		<.001		0.6775c		<.001
	Illness severity	−0.2976e		<.01		−0.3768c		<.001		−0.3684c		<.001
	Free service	0.0111		.76		0.1071		.07		0.4810c		<.001
Constant			0.1058e		<.01		−0.0898d		<.05		−0.0622		.12
R square			0.0891		N/A		0.0949		N/A		0.0979		N/A
Observations, n			18,699		N/A		18,679		N/A		18,679		N/A

^aThe dependent variable was patient satisfaction.

^bN/A: not applicable.

^cSignificant at P<.001.

^dSignificant at P<.05.

^eSignificant at P<.01.