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Table 1 Characteristics of Studies Included in the Meta-analysis

From: Fish consumption and the risk of gastric cancer: systematic review and meta-analysis

Reference

Design

Country

No. of Cases/No. of Non-cases

OR or RR (95% CI)

Fish Consumption Levels

Covariate Adjustment

Methods Used for Assessing Dietary Dntake

Buiatti 1991

PCC

Italy

510/1159

1.00 (0.80-1.30)

T3 vs. T1

Age, sex, area, place of residence, migration, socioeconomic status, familiar GC history, Quetelet index, total caloric intake

Interview with a structured questionnaire

Chen 2002

PCC

China

124/449

0.58 (0.25-1.40)

Q4 vs. Q1

Age, sex, energy intake, respondent type, BMI, alcohol use, tobacco use, eduction, family history, vitamin supplement use

Interview with a modified version of the short Health Habits and History Questionnaire

Cornée 1995

HCC

France

92/128

0.97 (0.48-1.96)

Q3 vs. Q1

Age, sex, occupation and total energy intake

Interview with a dietary history questionnaire

De Stefani 2004

HCC

Uruguay

240/960

0.73 (0.51-1.03)

T3 vs. T1

Age, sex, residence, urban/rural status, education, boby mass index, toal energy intake

Interview with a food frequency questionnaire (FFQ)

Fernandez 1999

HCC

Italy

745/7990

0.80 (0.70-0.90)

Increment 1 serving/wk vs. 1 Serving/wk

Age, sex, area of residence, education, smoking, alcohol consumption, body mass index

Interview with a structured questionnaire

Hamada 2002

HCC

Brazil

96/192

0.30 (0.10-2.20)

Daily vs. <1 d/week

Beef comsuption, country of birth

Interview with a questionnaire

Hoshiyama 1992

PCC

Japan

216/483

0.90 (0.50-1.40)

≥15/week vs. ≤4/week

 

Interview with a lifestyle questionnaire

Hu 2008

PCC

Canada

1182/5039

1.3 (1.00-1.60)

Q3vs. Q1 (≥5 oz/week vs. ≤2 oz/week)

Age, province, education, body mass index, sex, alcohol use, pack-year smoking, total of vegetable and fruit intake

Mail with a short version of the Block food frequency questionnaire (FFQ)

Muñoz 2001

PCC

France

302/485

0.36 (0.22-0.60)

Q4 vs. Q1

age, sex, tobacco, alcohol, total calories and SES

Interview with a semi-quantitative food frequency questionnaire (FFQ)

Phukan 2006

HCC

India

329/665

0.18 (0.02-5.30)

≥2/week vs. never

Level of education, tobacco use, alcohol drinking,

Interview with a structured pretested questionnaire

Pourfarzi 2009

PCC

Iran

210/389

0.37 (0.19-0.70)

≥1/week vs. never or infrequently

Gender, age group, education, family history of GC, citrus fruit, garlic, onion, red meat, fish, diary products, strength and warmth of tea, preference for salt intake and H. pylori

Interviewed with a structured questionnaire

Rao 2002

HCC

India

119/1591

1.4 (0.95-2.00)

At least once a week vs. never or once in 2 weeks

Habit, age group and sex

Interview with a questionnaire

Ito 2003

HCC

Japan

508/36490

0.60 (0.40-0.90)

≥ 5 times/week vs. < 1 time/week

Age, year, season at first hospital visit, smoking habit and family history of gastric cancer

Interview with a self-administered questionnaire

Takezaki 2001

PCC

China

187/333

1.35 (0.64-2.85)

≥3 times/week vs. <1 time/month

Age, sex, smoking and drinking

Interview with a structured questionnaire

Ward 1999

PCC

Mexico

220/752

2.20 (1.20-3.80)

≥2.6 times/week vs. <1 time/week

Age, gender, total calories, chilli pepper consumption, added salt, history of peptic ulcer, cigarette smoking and socioeconomic status

Interview with a semiquantitative food frequency questionnaire

Larsson 2006

cohort

Sweden

136/61433

1.14 (0.75-1.72)

Highest vs. lowest

Age, education, body mass index, intake of total energy, alcohol, fruits and vegetables

Mail with a food-frequency questionnaire (FFQ)

Ngoan 2002

cohort

Japan

107/12365

0.90 (0.30-2.10)

≥1 time/day vs. ≤2-4 time/month

Sex, age, smoking and other dietary factors

Interview with a self-administered questionnaire

  1. Abbreviations: PCC: population-based case-control study; HCC: hospital-based case-control study; Q: quartile; T: tertile; OR: Odd Risk, RR: Relative Risk; CI: Confidence Interval