Table 2.

HR and 95% CIs for baseline characteristics in relation to gastric cancer risk

OverallMenWomen
Cases, nHR (95% CI)Cases, nHR (95% CI)Cases, nHR (95% CI)
N647394253
Education
 No formal education2241.00a641.00a1601.00a
 Primary level3090.87 (0.72–1.05)2431.11 (0.84–1.47)660.61 (0.45–0.82)
 ≥Secondary level1140.63 (0.49–0.81)870.74 (0.53–1.04)270.59 (0.38–0.90)
Ptrend<0.0010.0320.001
Body mass index, kg/m2
 <20801.00a451.00a351.00a
 20–<243671.26 (0.99–1.60)2241.46 (1.06–2.02)1431.00 (0.69–1.45)
 24–<281441.24 (0.94–1.63)931.51 (1.06–2.16)510.92 (0.59–1.42)
 ≥28561.71 (1.21–2.42)322.24 (1.41–3.53)241.20 (0.71–2.02)
Ptrend0.0120.0020.774
Self-reported diabetes
 No5881.00a3661.00a2221.00a
 Yes591.01 (0.77–1.33)280.84 (0.57–1.23)311.27 (0.86–1.85)
History of ulcer
 No6191.00a3751.00a2441.00a
 Yes281.03 (0.71–1.51)190.93 (0.58–1.48)91.42 (0.73–2.77)
Smoking status
 Never3511.00b1341.00b2171.00b
 Former901.16 (0.84–1.62)791.00 (0.70–1.44)112.32 (0.99–5.42)
 Current2061.70 (1.33–2.17)1811.64 (1.25–2.15)251.82 (0.95–3.47)
Alcohol use
 Nondrinker5471.00a3051.00a2421.00a
 <7 drinks/week681.21 (0.94–1.57)601.25 (0.95–1.65)81.06 (0.52–2.15)
 ≥7 drinks/week321.13 (0.78–1.62)291.16 (0.79–1.71)30.99 (0.32–3.09)
Ptrend0.2080.1690.936
Fruit intake
 Quartile 12091.00c1151.00c941.00c
 Quartile 21751.02 (0.83–1.25)1091.10 (0.84–1.43)660.91 (0.66–1.26)
 Quartile 31400.88 (0.70–1.10)860.88 (0.66–1.18)540.90 (0.63–1.28)
 Quartile 41230.80 (0.63–1.03)840.83 (0.60–1.13)390.78 (0.52–1.19)
Ptrend0.0530.1280.265
Vegetable intake
 Quartile 11981.00c1081.00c901.00c
 Quartile 21670.98 (0.80–1.21)1031.10 (0.83–1.44)640.86 (0.62–1.19)
 Quartile 31510.98 (0.78–1.23)1011.18 (0.89–1.57)500.76 (0.52–1.09)
 Quartile 41310.98 (0.72–1.21)820.98 (0.70–1.37)490.91 (0.60–1.37)
Ptrend0.6270.8450.408
  • aHRs are adjusted for age (years), gender (in overall model only), interview year (1993–1995, 1996–1998), dialect (Hokkien, Cantonese), cigarette smoking status (never, former, current), number of cigarettes smoked per day (never, 1–12, ≥13), years smoked (never, 1–39, ≥40), and body mass index (<20, 20–<24, 24–<28, ≥28 kg/m2).

  • bHRs are adjusted for same covariates as listed above (a), excluding cigarette smoking status.

  • cHRs are adjusted for same covariates as listed above (a), including total energy intake (kcal/day).