Table 1

Baseline characteristics of the Korean Life Course Health Study, 1992–1994 according to smoking status*

CharacteristicsNon-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, year26.6 (2.1)26.9 (1.9)26.6 (2.0)26.8 (1.9)26.8 (1.9)0.1622
Systolic blood pressure, mm Hg120.4 (11.6)120.0 (11.8)119.8 (11.6)120.1 (11.6)120.3 (11.6)0.2558
Diastolic blood pressure mm Hg78.0 (9.0)77.7 (9.1)77.5 (9.0)77.8 (9.0)78.0 (9.0)0.1122
Total cholesterol, mg/dL173.4 (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/dL86.7 (13.3)86.6 (13.5)86.2 (14.1)86.4 (14.1)86.6 (15.3)0.4821
Alcohol consumption, g/day7.3 (17.7)9.7 (19.7)12.2 (22.6)14.5 (25.1)20.4 (36.1)<0.0001
Conditions, %
 Hypertension‡15.715.114.515.615.70.7987
 Hypercholesterolaemia§3.43.33.33.94.70.0743
 Diabetes¶0.70.80.90.91.00.0060
 Alcohol use**61.281.388.288.386.90.1035
 Physical activity24.926.822.917.513.0<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.