Table 1. Descriptive statistics comparing analyzed participants with participants who dropped out of the health examination in 2008.
| Analyzed | Dropped out | P-value | |
| (n = 4,537) | (n = 1,659) | ||
| Age, years, mean (SD) | 45.0 (8.4) | 46.9 (9.2) | <0.001 |
| Sex | <0.001 | ||
| Men | 3,643 (80.3) | 1,203 (72.5) | |
| Women | 894 (19.7) | 456 (27.5) | |
| Obesity | 0.015 | ||
| BMI <25.0 kg/m2 | 3,509 (77.3) | 1,234 (74.4) | |
| BMI ≥25.0 kg/m2 | 1,028 (22.7) | 425 (25.6) | |
| Fasting glucosea | 0.518 | ||
| Normal | 3,185 (70.2) | 1,150 (69.3) | |
| Elevated | 1,346 (29.7) | 506 (30.5) | |
| Diabetesa | 0.102 | ||
| No | 4,357 (96.2) | 1,577 (95.1) | |
| Yes | 174 (3.8) | 79 (4.8) | |
| Hypertension based on the 2017 ACC/AHA guidelines |
0.911 | ||
| No | 2,870 (63.3) | 1,052 (63.4) | |
| Yes | 1,667 (36.7) | 607 (36.6) | |
| Hypertension based on the JNC7 guidelines |
0.070 | ||
| No | 4,043 (89.1) | 1,451 (87.5) | |
| Yes | 494 (10.9) | 208 (12.5) | |
| Triglycerides | 0.743 | ||
| Normal | 3,378 (74.5) | 1,242 (74.9) | |
| Elevated | 1,159 (25.5) | 417 (25.1) | |
| HDL cholesterol | 0.593 | ||
| Normal | 4,125 (90.9) | 1,501 (90.5) | |
| Reduced | 412 (9.1) | 158 (9.5) | |
| Toothbrushing frequency | 0.600 | ||
| ≥3 times | 844 (18.6) | 304 (18.3) | |
| 2 times | 2,361 (52.0) | 846 (51.0) | |
| ≤1 time | 1,332 (29.4) | 509 (30.7) | |
| Toothbrushing at night | 0.983 | ||
| Yes | 3,565 (78.6) | 1,304 (78.6) | |
| No | 972 (21.4) | 355 (21.4) | |
| CAL, mean (SD) | 2.52 (0.72) | 2.57 (0.77) | 0.018 |
ACC/AHA, American College of Cardiology/American Heart Association; BMI, body mass index; CAL, clinical attachment level; HDL, high-density lipoprotein; JNC7, Seventh Report of the Joint National Committee on the Prevention, Detection, Evaluation, and Treatment of High Blood Pressure; SD, standard deviation.
Values reported as n (%), unless otherwise noted.
Chi-square test was performed for categorical variables, and Mann-Whitney U test was performed for continuous variables.
aExcluding individuals with a missing value (n = 6 in analyzed and n = 3 in dropped out).