Table 1.

Summary statistics

	N	Mean	SD	Min	Max
Monthly hospital visit	2688	39 193	43 926	2796	228 693
Age	2688	42.86 years	3.75 years	31.64 years	55.49 years
Sex	2688	0.58	0.01	0.53	0.61
Spending per-visit	2688	19 839 KRW	3260 KRW	14 821 KRW	29 815 KRW
		(US$ 18)	(US$ 3)	(US$ 14)	(US$  27)
– Patient-sharing	2688	6011 KRW	888 KRW	4176 KRW	8993 KRW
		(US$6)	(US$1)	(US$4)	(US$8)
– NHI-sharing	2688	13 804 KRW	2454 KRW	10 108 KRW	21 267 KRW
		(US$ 13)	(US$ 2)	(US$ 9)	(US$ 19)

This table displays the number of observations (N), as well as the mean, standard deviation (SD), minimum (min) and maximum (mad) values for the key variables used in this paper, which are derived from the monthly aggregated numbers for each city/province. Sex is the ratio of female patients to male patients