Table 1 Study characteristics of published cohort and case-control studies on tea consumption and bladder cancer
From: Tea consumption and risk of bladder cancer: a meta-analysis
Authors and year | Study design | Country | Study period | Cases/ subjects | Anatomical site of urinary tract | Tea type | Variables of adjustment | Tea drinking assessment |
|---|---|---|---|---|---|---|---|---|
Ros et al. [40] | Cohort | European countries | 1992-2000 | 513/233,236 | Urinary tract | Tea | Age, sex, smoking status | Questionnaire |
Hemelt et al. [39] | HCC | China | 2005-2008 | 419/384 (green tea) | Bladder | Green tea | Age, sex, smoking status, smoking frequency, and smoking duration adjusted odds ratios | Questionnaire |
408/385 (black tea) | Black tea | |||||||
Kurahashi et al. [38] | Cohort | Japan | 1990-2005 | 164/49,566 (men) | Bladder | Green tea | Age, area, smoking status, alcohol and coffee consumption | Questionnaire |
42/54,874 (women) | ||||||||
Jiang et al. [37] | PCC | US | 1987-1999 | 1,586/1,586 | Bladder | Tea | Age, sex, race, level of education, use of NSAIDs, carotenoid intake, number of years as hairdresser/barber, cigarette smoking status, duration of smoking, and intensity of smoking. | Questionnaire |
Stefani et al. [36] | HCC | Uruguay | 1996-2000 | 255/501 | Bladder | Tea | Age, sex, residence, urban/rural status, education, family history of bladder cancer among first-degree relatives, body mass index, occupation, smoking status, years since quitting, number of cigarettes smoked per day, maté drinking, soft drink intake, milk intake, and, coffee drinking | Both |
Wakai et al. [35] | HCC | Japan | 1994-2000 | 124/744 | Urinary tract | Green tea | Age, sex, cumulative consumption of cigarettes, year of first visit | Questionnaire |
Black tea | ||||||||
Woolcott et al. [34] | PCC | Canada | 1992-1994 | 927/2118 | Bladder | Tea | Age, sex, education level, current smoking, cumulative smoking, and intake of energy, calcium, fibre and beer | Questionnaire |
Zeegers et al. [33] | Cohort | Netherland | 1986-1992 | 569/3,123 | Bladder | Tea | Age, sex, number of cigarettes/day, years of cigarette smoking, and coffee consumption | Questionnaire |
Geoffery-Perez et al. [32] | HCC | France | 1984-1987 | 765/765 | Bladder | Tea | Age, sex smoking, residence, center | Interview |
Bianch et al. [30] | PCC | USA | 1986-1989 | 1,452/2,434 | Bladder | Tea | Age, sex, education, smoking status, family history of bladder cancer, high risk occupation, total beverage consumption, years of chlorinated surface water, vegetable and coffee consumption | Questionnaire |
Nagano et al. [31] | Cohort | Japan | 1979-1981 | 114/3,8540 | Bladder | Green tea | Age, gender, radiation dose, smoking status, education level, body-mass index, and calendar time | Questionnaire |
Black tea | ||||||||
Lu et al. [28] | HCC | Taiwan | 1996-1997 | 40/160 | Bladder | Tea | age, sex, date of admission, family history, ethnicity, and smoking status. | Questionnaire |
Michaud et al. [29] | Cohort | US | 1986-1996 | 252/47,909 | Bladder | Tea | Geographic region, age, pack-years of smoking, current smoking status, energy intake, intake of fruits and vegetables, and intake of all other beverages. | Questionnaire |
Bruemmer et al. [27] | PCC | US | 1987-1990 | 262/405 | Bladder | Tea | Age, sex, smoking, county | Interview |
Chyou et al. [26] | Cohort | US | 1965-1968 | 96/7,995 | Urinary tract | Green tea | Age, smoking | Both |
Black tea | ||||||||
Kunze et al. [25] | HCC | Germany | 1977-1985 | 675/675 | Urinary tract | Black tea | Age, sex, smoking | Interview |
D’Avanzo et al. [24] | HCC | Italy | 1985-1990 | 555/855 | Bladder | Tea | Age, sex, education, smoking habits, alcohol drinking and exposure to occupational risk | Interview |
Nomura et al. [23] | PCC | US | 1977-1986 | 261/522 | Urinary tract | Black tea | Age, sex, pack-years of cigarette smoking | Interview |
Clavel et al. [22] | HCC | France | 1984-1987 | 690/690 | Bladder | Tea | Age, sex, smoking | Interview |
Slattery et al. [18] | PCC | US | 1977-1982 | 419/889 | Bladder | Tea | Age, sex, smoking status, diabetes and bladder infection | Interview |
Risch et al. [21] | PCC | Canada | 1979-1982 | 876/1,668 | Bladder | Tea | Age, sex, residence, and lifetime cigarette consumption. | Interview |
Jensen et al. [20] | PCC | Denmark | 1979-1981 | 371/771 | Bladder | Tea | Age, sex, smoking status, | Interview |
Ohno et al. [19] | PCC | Japan | 1976-1978 | 293/589 | Urinary tract | Black tea | Age, smoking | Interview |