TABLE 2.
Summary of simulating cohort in Korea, Singapore, and the United States
| Korea | United States | Singapore | |
|---|---|---|---|
| Percentage of current smokers in initial cohort | 27.9 | 29.5 | 9.78 |
| Mean cumulative pack-years of light smokersa (30th percentile smokers) | 9.90 (4.01) | 20.6 (5.07) | 5.83 (4.03) |
| Mean cumulative pack-years of heavy smokersb (70th percentile smokers) | 39.9 (16.2) | 35.3 (5.16) | 43.1 (15.9) |
Light smokers were defined as having less than the 30th percentile of cumulative pack-years at age 50 for each country. Mean cumulative pack-years for male light smokers in Korea, the United States, and Singapore were 9.9, 20.6, and 5.8 pack-years, respectively. Pack-years are defined as the cumulative number of packs of cigarettes a person self-reports as having smoked up to age 50, expressed as the equivalent number of packs per day for a single year.
Heavy smokers were defined as having greater than the 70th percentile of cumulative pack-years at age 50 for each country. Mean cumulative pack-years for male heavy smokers in Korea, the United States, and Singapore were 39.9, 35.3, and 43.1 pack-years, respectively.