Table 3.

Descriptive statistics and correlations of major variables.

Variable	Count	Mean value	SD	Minimum value	Maximum value
Patient satisfaction	18,699	0.49	0.50	0	1
Response load	18,699	38.26	74.31	0.07	302.67
Detailed expression	18,699	101.61	113.51	1	490
Emotional comfort	18,699	0.23	0.42	0	1
Free service	18,699	0.36	0.48	0	1
Gender	18,699	0.41	0.49	0	1
Age	18,699	29.61	10.60	0	94
Neurology department	18,699	0.15	0.35	0	1
Dermatology department	18,699	0.12	0.33	0	1
Traditional Chinese Medicine department	18,699	0.10	0.30	0	1
Respiratory and critical care medicine department	18,699	0.09	0.28	0	1
Endocrinology department	18,699	0.06	0.23	0	1
Endorenal rheumatology department	18,699	0.05	0.23	0	1
Patient’s residence	18,699	0.22	0.41	0	1
Symptom description	18,699	73.98	65.13	10	500
Interaction frequency	18,699	3.07	2.98	1	18
Illness severity	18,699	0.03	0.16	0	1