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Table 3 Number of food items and portion size reported by each study within the Bladder cancer Epidemiology and Nutritional Determinants study (BLEND)

From: International pooled study on diet and bladder cancer: the bladder cancer, epidemiology and nutritional determinants (BLEND) study: design and baseline characteristics

 Study

Food items (n)

Portion size

Case–control studies

 Los-Angeles bladder cancer Case–control study [10]

49

Yes

 Roswell Park Cancer Institute [11]

44

Yes

 Belgian Case–control study on bladder cancer [12]

788

Yes

 Aichi Prefecture Case–control study [13]

107

Yes

 Kaohsiung [14]

41

Yes

 Hessen Case–control study on bladder cancer [15]

26

No

 Stockholm Case–control study [16]

188

Yes

 Roswell Park Memorial Institute Case–control study on bladder cancer [17]

64

Yes

 Reina Sofia University [18]

17

No

 New Hampshire bladder cancer study [19]

121

Yes

 Italian Case–control study on bladder cancer [20]

21

No

 Brescia bladder cancer study [21]

40

Yes

 Dortmund Hörde study [22]

3

Yes

 National Enhanced Cancer Surveillance System (NESCC) [23]

69

Yes

 French INSERM study [24]

2

No

 South and East China Case–control study on bladder and prostate cancer [25]

52

No

 Molecular Epidemiology of Bladder Cancer and Prostate Cancer [26]

90

Yes

 North Carolina case control study [27]

9

No

Cohort studies

 Swedish Mammography Cohort (SMC) & the Cohort of Swedish Men [28]

96

No

 Netherlands Cohort Study on diet and cancer, the Netherlands, 1986–2003 [29]

150

Yes

 Women’s Lifestyle and Health Study [30]

98

Yes

 RERF atomic bomb survivors Study [31]

102

No

 Vital study [32]

126

Yes

 European Prospective Investigation into Cancer and Nutrition (EPIC) [33, 34]

260a

Yes

  1. aDietary intake was assessed by a number of different instruments in the participating countries and the number of different food items varied from 88 (Norway) to 2443 (Sweden)