Table 1.

Comparison of clinical data between the two groups

Group	Case	Gender		Age (years x̅ ± sd)	course of disease (years, x̅ ± sd)	Illness
		Male	Female			moderate	severe
Observation group	49	27	22	45.86±13.29	6.84±1.75	31	18
Control group	49	29	20	44.73±12.61	6.52±1.68	34	15
t/χ 2	-	0.167		0.432	0.923	0.411
P	-	0.683		0.667	0.358	0.521