“…Hejazi et al(16) Age, sex, BMI, smoking, alcohol, opium, wealth score, physical activity, dietary fat, carbohydrate, fiber intake, history of CVD, COPD, renal failure, diabetes Milajerdi et al(18) Age, sex, energy intake, marital status, smoking, family history of cancer, physical activity, supplement use, disease duration, high-risk residential area, history of exposure to the radiographic X-ray, history of head trauma, duration of cell phone use, history of allergy, history of hypertension, exposure to chemicals, drug use, frequent fried food intake, frequent use of barbecue, canned foods and microwave, high-risk occupation, dietary intakes of polyunsaturated fatty acids, sodium, calcium, selenium, vitamin C, vitamin E, vitamin B6, folic acid, BMIRonco et al (20) Age, residence, family history of cancer in first degree, BMI, smoking intensity, alcohol status, "Mate" intake, tea intake, energy, total fiber, total carotenoids, lignans, flavonols, glutathione, vitamin C, vitamin E, animal-based iron, total heterocyclic amines Shi et al (22) Age, sex, smoking status, history of diabetes, alcohol intake, BMI, family history of pancreatic cancer, dietary fiber, carbohydrate, energy intake from diet Nasab et al (17) Age, comorbidity, cancer family history, common ways of cooking, level of salt intake, physical activity, calcium supplement use Wu et al (24) Age at diagnosis, race/ethnicity, education level, intervention group, menopausal status at baseline, total calorie intake, alcohol intake, physical activity, BMI, number of comorbidities, tumor stage, tumor size, estrogen and progesterone receptor status, tamoxifen use, radiotherapy, chemotherapy Wu et al (25) Age at diagnosis, race/ethnicity, education level, intervention group, menopausal status at baseline, total calorie intake, alcohol intake, smoking status, pack-years, physical activity, BMI, tumor stage, tumor size, estrogen and progesterone receptor status, tamoxifen use, radiotherapy, chemotherapy women, weight at age 18 years old, number of children, length of breastfeeding, family history of breast cancer, energy intake Wright et al (23) Age, energy intake, number of years of smoking, cigarettes/day, intervention assignment BMI, body mass index; COPD, chronic obstructive pulmonary disease; CVD, cardiovascular disease; "Mate" is the name of the staple infusion in Uruguay, made from the Ilex paraguariensis herb. *A study could be awarded a maximum of one star for each item except for the item Control for important factor or additional factor.…”