TABLE 1.
Characteristics of cohort studies included in the present pooled analysis to determine associations between body mass index (BMI) and lung cancer.
| Study | Cohort participants | Age at baseline survey (years) | Baseline survey (year) | Cohort size | Response rate of the baseline questionnaire (%) | Outcome ascertainment | For the present pooled analysis | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age (years) | Date of last follow‐up | Mean duration of follow‐up (years) | Mean of BMI (SD) | Baseline cohort size | Lung cancer cases | |||||||||
| Men | Women | Men | Women | |||||||||||
| JPHC‐I | Japanese residents of five public health center areas in Japan | 40–59 | 1990 | 61,595 | 82 | Cancer registry and death certificate | 40–59 | Dec 31, 2013 | 20.8 | 23.6 (3.0) | 20,155 | 21,673 | 584 | 219 |
| JPHC‐II | Japanese residents of six public health center areas in Japan | 40–69 | 1993‐1994 | 78,825 | 80 | Cancer registry and death certificate | 40–69 | Dec 31, 2013 (Suita, Osaka is only until Dec 31, 2012) | 17.2 | 23.4 (3.0) | 28,874 | 31,966 | 894 | 330 |
| JACC | Residents from 45 areas throughout Japan | 40–79 | 1988‐1990 | 110,792 | 83 | Cancer registry (selected areas: 24) and death certificate | 40–79 | 2009 | 13.2 | 22.8 (3.0) | 46,395 | 64,190 | 646 | 226 |
| MIYAGI | Residents of 14 municipalities in Miyagi Prefecture, Japan | 40–64 | 1990 | 47,605 | 92 | Cancer registry and death certificate | 40–64 | Dec 31, 2014 | 21.5 | 23.7 (2.9) | 21,094 | 22,657 | 800 | 303 |
| OHSAKI | Beneficiaries of National Health Insurance among residents of 14 municipalities in Miyagi Prefecture, Japan | 40–79 | 1994 | 54,996 | 95 | Cancer registry and death certificate | 40–79 | Mar 31, 2008 | 10.8 | 23.6 (3.1) | 21,514 | 23,209 | 583 | 179 |
| TAKAYAMA | Residents of Takayama, Gifu Prefecture, Japan | ≥35 | 1992 | 31,552 | 92 | Cancer registry and death certificate | 35–101 | Mar 31, 2008 | 13.7 | 22.2 (2.8) | 13,409 | 15,573 | 266 | 104 |
| 3‐Pref MIYAGI | Residents of three municipalities in Miyagi Prefecture, Japan | 40+ | 1984 | 31,345 | 94 | Cancer registry and death certificate | 40+ | Dec 31, 1992 | 7.7 | 23.2 (3.1) | 13,010 | 15,944 | 154 | 56 |
| 3‐Pref AICHI | Residents of two municipalities in Aichi Prefecture, Japan | 40+ | 1985 | 33,529 | 90 | Cancer registry and death certificate | 40–103 | Dec 31, 2000 | 11.6 | 22.1 (2.9) | 15,746 | 17,783 | 298 | 115 |
| 3‐Pref OSAKA | Residents of four municipalities in Osaka Prefecture, Japan | 40+ | 1983 | 35,755 | 82 | Cancer registry and death certificate | 40–97 | Jan 31, 2000 | 12.3 | 22.4 (3.0) | 15,919 | 17,973 | 333 | 108 |
| LSS | Atomic bomb survivors in Hiroshima and Nagasaki, Japan | 46–104 | 1991 | 20,147 | 100 | Cancer registry and death certificate | 46–100 | Dec 31, 2003 | 10.9 | 22.4 (3.2) | 6541 | 10,518 | 169 | 87 |
| Total | 202,657 | 241,486 | 4727 | 1727 | ||||||||||
Abbreviations: 3‐Pref AICHI, Three‐Prefecture Study – Aichi portion; 3‐Pref MIYAGI, Three‐Prefecture Study – Miyagi portion; 3‐Pref OSAKA, Three‐Prefecture Study – Osaka portion; JACC, Japan Collaborative Cohort Study; JPHC, Japan Public Health Center–based prospective Study; LSS, Life Span Study; MIYAGI, Miyagi Cohort Study; OHSAKI, Ohsaki National Health Insurance Cohort Study; TAKAYAMA, Takayama Study.