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Table 1 Characteristics of prospective studies included in the meta-analysis

From: Association between coffee consumption and risk of bladder cancer in a meta-analysis of 16 prospective studies

Author, years

Country

Population

Duration, yr

Participants

N of cases (% M)

N and sex

Age, yr

% Smoker

Jacobsen, 1986 [19]

Norway

Norwegian cohort of mostly men

11.5

13,664 M; 2891 W

≥35

37.9% (M only)

94 (69.1%)

Mills, 1991 [26]

US

AHS

5.3

34,198 M&W

≥25

1.4%

52 (69.2%)

Chyou, 1993 [27]

US

Japanese-American men

22.0

7995 M

NR

43.7%

96 (100%)

Stensvold, 1994 [15]

Norway

CVD screening Participants

10.1

21,735 M; 21,238 W

35–54

46.1% (M);

34.1% (W)

53 (75.5%)

Michaud, 1999 [28]

US

HPFS

9.1

47,909 M

40–75

9.6%

252 (100%)

Nagano, 2000 [29]

Japan

LSS

11.7

14,873 M; 23,667 W

52.8 (M);

56.8 (W)

35.0%

114 (72.8%)

Zeegers, 2001 [16]

The Netherlands

NCS

6.1

1515 M; 1598 W (sub-cohort)

55–69

34.0% (M);

20.0% (W)

569 (93.5%)

Tripathi, 2002 [30]

US

IWHS

13.0

37,459 W

55–69

15.0%

112 (0%)

Kurahashi, 2009 [17]

Japan

JPHC

12.6

49,566 M; 54,874 W

40–69

52.5% (M);

6.7% (W)

206 (79.6%)

Ros, 2011 [21]

5 European countries

EPIC

9.3

67,914 M; 165,322 W

53.7 (M);

52.9 (W)

23.7%

513 (50.5%)

Hashibe, 2015 [31]

US

PLCO

14.0

97,334 M&W

55–74

9.1%

398 (NA)

Loftfield, 2017 [6]

US

NIH-AARP Diet and Health

15.5

469,047 M&W

50–71

14.2%

6012 (84.6%)

Sugiyama, 2017 [17]

Japan

MCS; OCS

17.6 (MCS); 13.3 (OCS)

73,346 M&W

40–64 (MCS); 40–79 (OCS)

35.3%

274 (73.7%)

Gapstur, 2017 [5]

US

CPS-II

23.4

696,391 M&W nonsmokers

28–94

0%

1789 BCa death (NA)

Lukic, 2018 [8]

Norway and Sweden

NOWAC; NSHDS

13.6

193,439 M&W

25–74

24.8%

479 (59.7%)

Hashemian, 2019 [9]

Finland

ATBC

17.6

26,841 male smokers

57.2

100%

835 (100%)

  1. Abbreviations: AHS Adventist Health Study, ATBC Alpha-Tocopherol, Beta-Carotene Cancer Prevention, BCa bladder cancer, CPS Cancer Prevention Study, CVD cardiovascular disease, EPIC European Prospective Investigation into Cancer and Nutrition Study, HPFS Health Professionals Follow-up Study, IWHS Iowa Women’s Health Study, JPHC Japan Public Health Center, LSS Life-Span Study, M men, MCS Miyagi Cohort Study, NA not available, NCS Netherlands Cohort Study, NIH-AARP National Institutes of Health-American Association of Retired Persons, NOWAC Norwegian Women and Cancer, NSHDS Northern Sweden Health and Disease Study, OCS Ohsaki Cohort Study, PLCO Prostate, Lung, Colorectal, and Ovarian, W women