Table 1.
Baseline characteristics of the Korean Life Course Health Study, 1992–1994 according to smoking status*
| Characteristics | Non-smokers (n=24 950) |
Ex-smokers (n=15 126) |
No of cigarettes per day among current smokers | |||
| 1–9 (n=22 642) |
10–19 (n=35 690) |
≥20 (n=20 123) |
P for trend† |
|||
| Age, year | 26.6 (2.1) | 26.9 (1.9) | 26.6 (2.0) | 26.8 (1.9) | 26.8 (1.9) | 0.1622 |
| Systolic blood pressure, mm Hg | 120.4 (11.6) | 120.0 (11.8) | 119.8 (11.6) | 120.1 (11.6) | 120.3 (11.6) | 0.2558 |
| Diastolic blood pressure mm Hg | 78.0 (9.0) | 77.7 (9.1) | 77.5 (9.0) | 77.8 (9.0) | 78.0 (9.0) | 0.1122 |
| Total cholesterol, mg/dL | 173.4 (32.9) | 173.4 (32.6) | 172.9 (33.1) | 174.5 (33.4) | 177.2 (34.4) | 0.9543 |
| Body mass index, kg/m2 | 22.3 (2.4) | 22.4 (2.4) | 22.3 (2.4) | 22.5 (2.5) | 22.9 (2.6) | 0.0056 |
| Fasting serum glucose, mg/dL | 86.7 (13.3) | 86.6 (13.5) | 86.2 (14.1) | 86.4 (14.1) | 86.6 (15.3) | 0.4821 |
| Alcohol consumption, g/day | 7.3 (17.7) | 9.7 (19.7) | 12.2 (22.6) | 14.5 (25.1) | 20.4 (36.1) | <0.0001 |
| Conditions, % | ||||||
| Hypertension‡ | 15.7 | 15.1 | 14.5 | 15.6 | 15.7 | 0.7987 |
| Hypercholesterolaemia§ | 3.4 | 3.3 | 3.3 | 3.9 | 4.7 | 0.0743 |
| Diabetes¶ | 0.7 | 0.8 | 0.9 | 0.9 | 1.0 | 0.0060 |
| Alcohol use** | 61.2 | 81.3 | 88.2 | 88.3 | 86.9 | 0.1035 |
| Physical activity | 24.9 | 26.8 | 22.9 | 17.5 | 13.0 | <0.0001 |
*Data are expressed as means (SD) unless otherwise indicated.
†Testing for trend across nonsmokers and current smokers; ex-smokers were excluded.
‡Systolic blood pressure of at least 140 mm Hg and/or diastolic blood pressure of at least 90 mm Hg.
§Total cholesterol level of at least 6.21 mmol/L (240 mg/dL).
¶Fasting serum glucose value of at least 6.99 mmol/L (126 mg/L).
**Consumption of Soju which is a colourless distilled beverage of Korean origin.