Table 1.

Baseline clinical characteristics of cancer patients in this study (n = 1030)

Clinical parameter
Age, years	64.3 ± 13.9
Gender, male/female	619/411
Smoking status, n (%)
No	396 (38.4)
Former	433 (42.0)
Current	193 (18.7)
Alcohol consumption, n (%)
No	428 (41.6)
Occasionally	256 (24.9)
Daily	335 (32.5)
Hypertension, n (%)	263 (25.5)
Diabetes mellitus, n (%)	139 (13.5)
Hyperlipidemia, n (%)	108 (10.5)
Stroke, n (%)	47 (4.6)
Heart disease, n (%)	68 (6.6)
Previous episode of malignant tumor	190 (18.5)
Cancer type, n (%)
Gastroenterological cancer	274 (26.6)
Hematological cancer	180 (17.5)
Breast cancer	150 (14.6)
Head and neck cancer	142 (13.8)
Pulmonary cancer	131 (12.7)
Urology cancer	62 (6.0)
Gynecologic cancer	41 (4.0)
Brain cancer	26 (2.5)
Skin and musculoskeletal cancer	20 (1.9)
Unknown primary origin	4 (0.4)
Frequency of dental visits
≥ 1 time/year	507 (49.2)
< 1 time/year	523 (50.8)