Table 1.
General characteristics of included cohorts
| Characteristics | NHIS-KCPS |
KMSMS |
KCPS-II |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Men (n=845,932) | Women (n=481,071) | Total (n=1,327,003) | Men (n=173,089) | Women (n=130,914) | Total (n=304,003) | Men (n=134,633) | Women (n=92,325) | Total (n=226,958) | |
| Enrollment years | 1992-1999 | 1992-1999 | 1996-2004 | 1996-2004 | 1994-2013 | 1994-2013 | |||
| Follow-up duration, mean±SD (yr) | 24.2±6.3 | 24.3±5.5 | 17.9±3.6 | 18.2±3.2 | 14.1±4.0 | 14.9±4.1 | |||
| Age, mean±SD (yr) | 45.3±11.1 | 49.6±12.1 | 46.9±11.7 | 47.0±10.0 | 47.7±10.4 | 47.3±10.2 | 44.2±10.0 | 45.4±10.6 | 44.7±10.2 |
| 30-39 | 37.9 | 20.3 | 31.5 | 25.6 | 26.2 | 25.9 | 39.1 | 36.4 | 38.0 |
| 40-49 | 27.1 | 30.9 | 28.5 | 37.7 | 31.4 | 35.0 | 33.6 | 29.9 | 32.1 |
| 50-59 | 23.9 | 27.0 | 25.0 | 23.8 | 27.5 | 25.4 | 18.2 | 21.9 | 19.7 |
| 60-69 | 8.2 | 15.5 | 10.9 | 11.0 | 12.9 | 11.8 | 7.6 | 10.0 | 8.6 |
| 70+ | 2.9 | 6.3 | 4.1 | 1.9 | 1.9 | 1.9 | 1.5 | 1.8 | 1.6 |
| BMI (kg/m2) | |||||||||
| <18.5 | 2.8 | 4.1 | 3.3 | 2.4 | 4.0 | 3.1 | 1.8 | 5.7 | 3.4 |
| 18.5-22.9 | 45.8 | 46.1 | 45.9 | 33.6 | 45.6 | 38.7 | 29.4 | 49.5 | 37.6 |
| 23.0-25.0 | 28.0 | 23.1 | 26.2 | 29.2 | 23.4 | 26.7 | 28.8 | 21.2 | 25.7 |
| ≥25.0 | 23.4 | 26.7 | 24.6 | 34.9 | 27.0 | 31.5 | 40.0 | 23.5 | 33.3 |
| Alcohol consumption | |||||||||
| Yes | 72.0 | 12.4 | 50.4 | 84.0 | 33.3 | 62.1 | 84.2 | 38.5 | 65.6 |
| No | 28.0 | 87.6 | 49.6 | 15.5 | 64.8 | 36.7 | 13.6 | 56.8 | 31.1 |
| Missing | 0.0 | 0.0 | 0.0 | 0.5 | 1.9 | 1.1 | 2.3 | 4.8 | 3.3 |
| Smoking status | |||||||||
| Never smoker | 20.8 | 93.5 | 47.1 | 21.4 | 89.4 | 50.7 | 26.4 | 90.5 | 52.4 |
| Former smoker | 20.8 | 2.2 | 14.0 | 27.1 | 5.3 | 17.7 | 28.1 | 5.3 | 18.8 |
| Current smoker | 58.5 | 4.3 | 38.9 | 51.5 | 5.3 | 31.6 | 45.6 | 4.2 | 28.7 |
| Current smoker (n) | 494,719 | 20,840 | 515,559 | 89,167 | 6,961 | 96,128 | 61,329 | 3,894 | 65,223 |
| Amount smoked (cigarette/day) | |||||||||
| <10 | 3.2 | 19.5 | 3.8 | 9.9 | 34.3 | 11.7 | 13.0 | 40.4 | 14.6 |
| 10-20 | 66.7 | 69.5 | 66.9 | 31.5 | 34.2 | 31.7 | 39.4 | 33.5 | 39.1 |
| >20 | 30.1 | 11.0 | 29.3 | 54.3 | 20.6 | 51.9 | 45.7 | 16.2 | 43.9 |
| Missing | - | - | - | 4.2 | 10.9 | 4.7 | 2.0 | 9.9 | 2.4 |
| Smoking duration (yr) | |||||||||
| <5 | 3.0 | 14.0 | 3.4 | 8.8 | 15.7 | 9.3 | 1.8 | 7.7 | 2.1 |
| 5-9 | 6.5 | 10.5 | 6.6 | 1.3 | 11.6 | 2.1 | 4.7 | 17.7 | 5.4 |
| 10-19 | 30.9 | 13.6 | 30.2 | 22.6 | 31.8 | 23.2 | 39.5 | 40.4 | 39.5 |
| 20-29 | 23.1 | 16.3 | 22.8 | 29.3 | 15.3 | 28.3 | 32.7 | 16.1 | 31.6 |
| ≥30 | 15.8 | 24.0 | 16.2 | 19.5 | 5.8 | 18.5 | 16.9 | 5.9 | 16.2 |
| Missing | 20.8 | 21.7 | 20.8 | 18.5 | 19.8 | 18.6 | 4.7 | 12.2 | 5.1 |
Values are presented as %.
NHIS-KCPS, National Health Insurance Service-Korean Cancer Prevention Study; KMSMS, Korean Metabolic Syndrome Mortality Study; KCPS-II, Korean Cancer Prevention Study-II; SD, standard deviation; BMI, body mass index.