Table 4. Projected population-attributable fraction for excess body weight in Korea.
| Year of obesity prevalence | 1992 – 1995 | 1998 | 2005 | 2015* | 2020* | 2020 vs. 1992 - 1995 | ||||||
| Cancer site | No. of Cases | PAF(%) | No. of attributable cases | PAF(%) | No. of attributable cases | PAF(%) | No. of attributable cases | PAF(%) | No. of attributable cases | PAF(%) | No. of attributable cases | Difference in obesity-related cases |
| Men | ||||||||||||
| Colorectum | 14,949 | 6.8 | 1,010 | 6.5 | 977 | 8.4 | 1,248 | 8.9 | 1,333 | 9.5 | 1,412 | 403 |
| Pancreas | 2,356 | 2.9 | 69 | 2.9 | 69 | 3.9 | 93 | 4.4 | 102 | 4.7 | 111 | 42 |
| Kidney | 2,290 | 16.0 | 365 | 15.6 | 358 | 19.6 | 449 | 20.9 | 480 | 22.1 | 506 | 141 |
| Total | 96,826 | 1,444 | 1,404 | 1,790 | 1,915 | 2,029 | 586 | |||||
| % of all cancers | 1.5 | 1.5 | 1.9 | 2.0 | 2.1 | |||||||
| Women | ||||||||||||
| Colorectum | 9,776 | 6.6 | 645 | 6.6 | 645 | 7.1 | 689 | 7.2 | 704 | 7.3 | 717 | 71 |
| Pancreas | 1,901 | 3.9 | 73 | 4.1 | 77 | 4.3 | 82 | 4.6 | 87 | 4.7 | 90 | 17 |
| Kidney | 1,068 | 18.7 | 200 | 18.4 | 197 | 19.5 | 208 | 19.7 | 210 | 19.9 | 212 | 12 |
| Breast | 6,331 | 8.2 | 520 | 8.8 | 558 | 9.5 | 603 | 10.1 | 642 | 10.5 | 667 | 148 |
| Corpus uteri | 1,728 | 32.7 | 565 | 33.6 | 580 | 35.1 | 607 | 36.3 | 627 | 37.0 | 640 | 74 |
| Total | 91,068 | 2,004 | 2,058 | 2,190 | 2,270 | 2,326 | 322 | |||||
| % of all cancers | 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | |||||||
Notes: 1) Obese and overweight prevalence data were estimated from the large-scale cohort study of National Health Insurance Corporation in1992-1995, from Korea National Health and Nutrition Survey in 1998 and 2005, and from extrapolating to 2015 and 2020; cancer incidence in 2009 was used for the calculation of projected PAF and obesity-related cases.
2) BMI categories (kg/m2): reference group, <23.0; overweight, 23.0–24.9; obese, ≥25.
* Using projected prevalence of obesity in 2015, 2020 as shown in Table 3.