Table 7.

Comparison of the number of visits and expenses in the research group before and after admission (x̅ ± sd)

Group	Number of visits (times/month)			Medical expenses (yuan/month)
	Green card	Yellow card	Red card	Green card	Yellow card	Red card
At the time of enrollment (n=43)	0.86±0.41	2.38±0.46	3.97±0.72	162.34±13.38	406.21±30.41	851.26±39.87
12 months after enrollment (n=43)	0.56±0.28	1.45±0.74	2.61±0.55	154.49±14.75	365.14±29.94	769.52±37.71
t	3.962	6.999	9.843	2.585	6.311	9.767
P	<0.001	<0.001	<0.001	0.011	<0.001	<0.001