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Table 1 Characteristics of the studies included in the pooled analysis of 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

Country

Recruitment

period

Study design

Cases

N

Controls

N

    

men

women

total

men

women

total

Case–control studies

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

USA

1987–1999

Population based case–control

1,307

353

1,660

1,237

349

1,586

 Roswell Park Cancer Institute [11]

USA

1982–1998

Hospital-based case–control

164

53

217

501

163

664

 Belgian Case–control study on bladder cancer [12]

Belgium

1999–2004

Population based case–control

172

28

200

228

156

384

 Aichi Prefecture Case–control study [13]

Japan

1996–1999

Hospital-based case–control

245

58

303

244

59

303

 Kaohsiung [14]

Taiwan

1996–1997

Hospital-based case–control

31

9

40

124

36

160

 Hessen Case–control study on bladder cancer [15]

Germany

1989–1992

Hospital-based case–control

239

61

300

239

61

300

 Stockholm Case–control study [16]

Sweden

1985–1987

Population based case–control

204

67

271

281

268

549

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

USA

1957–1965

Hospital-based case–control

415

138

553

3,253

4,636

7,889

 Reina Sofia University Hospital [18]

Spain

1997

Hospital-based case–control

74

11

85

89

41

130

 New Hampshire bladder cancer study [19]

USA

1994–2001

Population based case–control

286

104

390

185

138

323

 Italian Case–control study on bladder cancer [20]

Italy

1985–1993

Hospital-based case–control

617

110

727

766

298

1,064

 Brescia bladder cancer study [21]

Italy

1997–2000

Hospital-based case–control

200

0

200

214

0

214

 Dortmund Hörde study [22]

Germany

2009–2010

Hospital based case–control

145

48

193

177

56

233

 National Enhanced Cancer Surveillance System (NESCC) [23]

Canada

1994–1997

Population based case–control

600

311

911

2,451

2,423

4,874

 French INSERM study [24]

France

1984–1987

Hospital-based case–control

166

33

199

275

47

322

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

China

2005–2008

Hospital-based case–control

390

93

483

364

100

464

 Molecular Epidemiology of Bladder Cancer and Prostate Cancer [26]

USA

1993–1997

Hospital-based case–control

149

45

194

243

58

301

 North Carolina case control study [27]

USA

1987–1991

Hospital-based case–control

188

56

244

174

41

215

Cohort studies

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

Sweden

1987–1990

Population based cohort

538

119

657

2,188

484

2,672

 Netherlands Cohort Study on diet and cancer [29]

The Netherlands

1986–2003

Population based cohort

779

161

940

2,273

2,419

4,692

 Women's Lifestyle and Health Study [30]

Norway, Sweden

1991–2006

Population based cohort

0

49

49

0

48,942

48,942

 RERF atomic bomb survivors Study [31]

Japan

1950–2000

Population based cohort

216

85

301

19,362

28,249

47,611

 VITamins and Lifestyle Study (VITAL) [32]

USA

2000–2008

Population based cohort

338

106

444

36,454

39,983

76,437

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

Europe

1993–2006

Population based cohort

1,227

525

1,752

141,872

333,279

475,151

TOTAL

8,657

2,604

11,313

213,227

462,305

675,480