Body mass index and lung cancer risk: a pooled analysis based on nested case-control studies from four cohort studies

Table 1 Characteristics of participating cohorts

Study	Location	Enrollment years	Baseline cohort	Age at enrollment	Follow-up mean years	Source of height and weight data	Cases/Controls (N = 4172/8471)	Matching
Carotene and Retinol Efficacy Trial	USA	1985–1994	18,314	45–69	11.5	Measured	787/1564	Age (± 4 years), sex, race, enrollment year (2-years intervals), baseline measures of smoking status (current or former), asbestos exposure (yes or no) and duration of follow up
European Prospective Investigation into Cancer and Nutrition	Europe	1992–2000	521,468	35–70	10.1	Mostly Measured, except for some EPIC centers ^a	1242/2622	Age, sex, smoking status, and country of recruitment
Shanghai Cohort Study	China	1986–1989	18,244	45–64	15.8	Self-reported	965/1929	Age and sex
Singapore Chinese Health Study	Singapore	1993–1998	63,257	45–74	10.0	Self-reported	1178/2356	Age and sex

^aOxford cohort, Norwegian cohort and approximately two-thirds of the French cohort, height and weight were self-reported

ISSN: 1471-2407