Table 3.

Baseline data.

Parameters	Observation group (n = 420)	Control group (n = 640)	P value
Age (years)	55.2 ± 17.3	53.8 ± 193	0.484
Sex
Male	240 (57.1%)	380 (59.4%)	0.733
Female	180 (42.9%)	260 (40.6%)
BMI (kg/m2)	24.5 ± 1.6	24.6 ± 1.8	0.554
Smoking
Yes	172 (41%)	274 (42.8%)	0.415
No	248 (59%)	366 (57.2%)
Alcohol addiction
Yes	242 (57.6%)	383 (59.7%)	0.536
No	178 (42.4%)	258 (40.3%)

BMI: body mass index.