Table 1

Study characteristics of published cohort and case–control studies on egg intake and ovarian cancer
Author publication year Country Study period Study design No. of subjects Cases FFQ used for dietary assessment Confounders for adjustment
La Vecchia C1987 Italy 1979-1986 Hospital-based case–control study 1,380 445 Yes Age, interviewer, marital status, social class, education, parity, age at first birth, age at menarche, menopausal status, age at menopause, BMI, oral contraceptive and other female hormone use, retinol and carotene indices, added score of fat consumption and alcohol intake
Engle A 1991 USA 1984-1989 Hospital-based case–control study 212 72 Yes Age and smoking status
Fairfield KM 2001 USA 1976-1996 Population-based cohort study 80,326 527 Yes Age, BMI, duration of oral contraception use, smoking history, parity, history of tubal ligation, total energy, and dietary fiber
Zhang M 2002 China 1999–2000 Hospital-based case–control study 906 254 Yes Age at interview, education, living area, BMI, smoking, alcohol drinking, tea drinking, family income, marital and menopause status, parity, tubal ligation, oral contraceptive use, physical activity, family history of ovarian cancer, total energy intake, fruit, milk, fish, meat, egg intake
Pan SY 2004 Canada 1994-1997 Case–control study population-based 2,577 442 Yes Age, province of residence, education, alcohol consumption, cigarette pack-years, BMI, total caloric intake, recreational physical activity, number of live births, menstruation years, and menopause status
Larsson SC 2004 Sweden 1987–1990 Population-based cohort study 61,084 266 Yes Age, BMI, educational level, parity, oral contraceptive use, fish consumption, and dietary lactose intake, consumption of total fruit
Mommers M 2005 Netherlands 1986-1997 Population-based cohort study 62,573 252 Yes Age, height, current cigarette smoker, duration of cigarette smoking, number of cigarettes smoked daily, duration of oral contraceptive use, parity, total fruit intake; total vegetable intake; all individual fruit or vegetable items listed for all other individual fruit or vegetable item
Sakauchi F 2007 Japan 1988-2003 Population-based cohort study 64,327 54 Yes Age, menopausal status, number of pregnancies, history of sex hormone use, BMI, physical activity, and education
Chang ET 2007 USA 1995-2003 Population-based cohort study 97,275 280 Yes Age, race, total energy intake, parity, oral contraceptive use, strenuous exercise, wine consumption, and menopausal status/hormone therapy use
Kolahdooz F 2009 Australia 1990-1993 Population-based case–control study 1,460 683 Yes Age, oral contraceptive use, parity, education after high school, and energy intake
Bosetti C 2012 Italy and Switzerland 1991-2009 Hospital-based case–control study 3,442 1,031 Yes Age, study center, year of interview, education, BMI, alcohol drinking, tobacco smoking, and total energy intake

BMI = body mass index; NR = not reported; FFQ = food frequency questionnaire.

The methodological qualities of the included studies were conducted by the Newcastle-Ottawa Scale (NOS) Assessment.

Han et al.

Han et al. Diagnostic Pathology 2014 9:7   doi:10.1186/1746-1596-9-7

Open Data