Table 1.

Comparison of general data between two groups of patients

Factors	Control group	Case group	χ2 or t value	95%CI	p value
Age (years),‾x±s	73.20±8.04	75.88±8.92	2.249	0.331–5.022	0.026
Sex (n, %)			0.737	0.429–1.392	0.391
Man	40 (30.53%)	29 (36.25%)
Woman	91 (69.47%)	51 (63.75%)
BMI (kg/m2)	22.76±2.57	22.08±2.03	2.021	-1.351– -0.017	0.045
Hospital stay (days)	12.46±3.16	14.99±5.72	4.132	1.323–3.736	<0.001