Table 1 Characteristics of the studies included in this meta-analysis.

From: Tomato consumption and prostate cancer risk: a systematic review and meta-analysis

Author

Year

Region

Design

No. of cases

Age (yr)

Exposure assessment

Outcome assessment

Matched or adjusted factors

NOS score

Diallo et al.

2016

France

Cohort

139

63

Interview

Biopsy

Age, energy intake, intervention group of the initial SU.VI.MAX trial, number of 24-h dietary records, smoking, education, physical activity, height, BMI, alcohol, family history of prostate cancer, baseline plasma PSA, Ca intake, dairy product intake and plasma α-tocopherol and Se concentrations

8

Hardin et al.

2011

USA

Case-control

470

65.8 (SD 8.3)

Questionnaire

Histologically confirmed

Age, race, institution, energy intake, and history of first-degree relative with prostate cancer

6

Salem et al.

2011

Iran

Case-control

194

71.1 (SD 7.84)

Interview

Histologically confirmed

Age, total dietary calories, BMI, occupation, education, smoking, alcohol, and family history of prostate cancer.

7

Shahar et al.

2011

Malaysia

Case-control

35

67.6 (SD 4.7)

Interview

Biopsy

Age, ethnic, family history of cancer, and energy intake

5

Takachi et al.

2010

Japan

Cohort

339

40–69

Questionnaire

Cancer registry

Age, public health center area, BMI, smoking, alcohol, dairy food, soy products, green tea, vitamin supplement use, marital status, screening examination

6

Vlajinac et al.

2010

Serbia

Case-control

101

NA

Questionnaire

Histologically confirmed

Age, hospital admission, place of residence, and energy

5

Subahir et al.

2009

Malaysia

Case-control

112

71.7 (50–86)

Questionnaire

Histologically confirmed

Age and ethnicity

5

Ambrosini et al.

2008

Australia

Cohort

97

62.6

Questionnaire

Cancer registry

Age, total fruit and vegetable intake, randomly assigned retinol or β-carotene supplement, and source of crocidolite exposure

6

Li et al.

2008

China

Case-control

28

71.4 (SD 6.0)

Interview

Biopsy

Age, place of employment, education, BMI, smoking, alcohol, and food frequency

5

Darlington et al.

2007

Canada

Case-control

752

50–84

Questionnaire

Cancer registry

Age, family history of prostate cancer, BMI, education, type of occupation, and total energy

6

Kirsh et al.

2006

USA

Cohort

1338

63.3

Questionnaire

Medical/pathologic records

Age, total energy, race, study center, family history of prostate cancer, BMI, smoking, physical activity, supplemental vitamin E, total fat, red meat, history of diabetes, aspirin use, and previous number of screening exams

7

Stram et al.

2006

USA

Cohort

3922

45–75

Questionnaire

SEER registry

Age, BMI, education, and family history of prostate cancer

7

Jian et al.

2005

China

Case-control

130

72.7 (SD 7.1)

Questionnaire

Histologically confirmed

Age, locality, education, family income, marital status, number of children, family history of prostate cancer, BMI, tea drinking, caloric intake, and fat intake

5

Hodge et al.

2004

Australia

Case-control

858

<70

Interview

Histologically confirmed

Age, state, year, country of birth, socioeconomic group, total energy intake, and family history of prostate cancer

6

Sonoda et al.

2004

Japan

Case-control

140

59–73

Questionnaire

Histologically confirmed

Age, smoking, and energy intake.

5

Bosetti et al.

2000

Greece

Case-control

320

NA

Questionnaire

Histologically confirmed

Age, height, BMI, years of schooling, total energy intake, milk and dairy products, butter, and seed oils intake

5

Cohen et al.

2000

USA

Case-control

628

40–64

Questionnaire

Histologically confirmed

Age, fat, energy, race, family history of prostate cancer, BMI, PSA tests, education, and total vegetables

7

Kolonel et al.

2000

USA

Case-control

1619

≤84

Interview

Histologically confirmed

Age, education, ethnicity, geographic area, and calories

6

Norrrish et al.

2000

New Zealand

Case-control

317

40–80

Questionnaire

Histologically confirmed

Age, height, total NSAIDs, and socioeconomic status

7

Jain et al.

1999

Canada

Case-control

617

69.8

Interview

Cancer registry

Age, total energy, vasectomy, ever-smoked, marital status, study area, BMI, education, multivitamin supplements, area of study, and log-converted amounts for grains, fruit, vegetables, total plants, total carotenoids, folic acid, dietary fiber, conjugated linoleic acid, vitamin E, vitamin C, retinol, total fat, and linoleic acid

7

Villeneuve et al.

1999

Canada

Case-control

1623

50–74

Questionnaire

Histologically confirmed

Age, province of residence, race, years since quitting smoking, cigarette pack-years, BMI, rice and pasta, coffee, grains and cereals, alcohol, fruit and fruit juices, tofu, meat, income, and family history of cancer

7

Key et al.

1997

UK

Case-control

328

68.1

Questionnaire

Histologically records

Age and social class

6

Giovannucci et al.

1995

USA

Cohort

812

40–75

Questionnaire

Medical records

Age and energy

7

Mills et al.

1989

USA

Cohort

180

74

Questionnaire

Histologically confirmed

Age, education, current use of meat, poultry, or fish, current fish only, beans, legumes or peas, citrus fruit, dry fruit, and index of fruit, nuts

5

  1. No., number; NOS, Newcastle-Ottawa Scale; yr, year; SD, standard deviation; BMI, body mass index; PSA, prostate-specific antigen; NSAIDs, non-steroidal anti-inflammatory drugs; NA, not available.