Table 1.

Comparison of baseline data between two groups (X ± SD)/[n (%)]

Clinical information		Observation group (n=89)	Control group (n=75)	t/X2	P
Gender	Male	59	45	0.003	0.957
	Female	30	30
Smoking history	Yes	29	15	3.283	0.07
	No	60	60
Hypertension	Yes	19	11	1.216	0.27
	No	70	64
Leukocyte (×109/L)		7.44 ± 2.11	6.12 ± 1.98	4.105	< 0.001
Average age (years)		45.98 ± 4.33	46.01 ± 4.29	0.044	0.965
Average weight (kg)		64.29 ± 3.91	64.34 ± 3.89	0.082	0.935