Table 1.

Comparison of clinical data

Items	Research group (n=84)	Control group (n=75)	x2 value	P value
Age			0.529	0.467
> 65 years old	54	44
≤ 65 years old	30	31
Sex			0.933	0.324
Male	44	45
Female	40	30
BMI (kg/m2)			0.701	0.402
< 25	38	29
≥ 25	46	46
History of hypertension			0.182	0.669
Yes	33	27
No	51	48
History of diabetes mellitus			0.149	0.698
Yes	18	18
No	66	57
History of smoking			0.933	0.324
Yes	44	45
No	40	30
History of alcoholism			0.060	0.805
Yes	10	8
No	74	67

Note: BMI: Body Mass Index.