Table 3.

Physical activity and HRs of incident gastric cancer and specifically noncardia gastric cancer among 73,133 Norwegians during 15.4 years of follow-up

Physical activityOverall gastric cancer
Noncardia gastric cancer
Person-yearsnHR*HR (95% CI)Person-yearsnHR*HR (95% CI)
Frequency/wk
    <1300,441931.001.0300,381831.01.0
    1192,168430.80.6 (0.4-0.9)192,094340.70.6 (0.4-1.0)
    >2256,730790.80.7 (0.5-1.0)256,550620.70.7 (0.5-1.0)
    P for trend0.090.080.020.06
Duration per episode of exercise (min)
    <1551,014261.01.050,978221.01.0
    15-30170,700490.80.8 (0.4-1.4)170,573370.70.7 (0.4-1.4)
    31-60214,759400.70.6 (0.3-1.1)214,697320.60.6 (0.3-1.2)
    >6089,102220.80.8 (0.4-1.6)89,058180.80.8 (0.4-1.6)
    P for trend0.320.320.380.43
Intensity
    Low279,5551121.01.0279,330901.01.0
    Moderate219,883290.80.9 (0.6-1.5)219,832230.80.9 (0.5-1.6)
    High19,23531.91.7 (0.4-7.2)19,23221.62.2 (0.5-9.4)
    P for trend0.720.990.640.83
Summary score§
    No activity87,538461.001.087,523421.01.0
    Low212,903470.80.7 (0.4-1.1)212,858410.70.7 (0.4-1.1)
    Moderate202,835640.70.6 (0.4-0.9)202,688500.60.5 (0.3-0.9)
    High226,442450.60.5 (0.3-0.9)226,352360.50.5 (0.3-0.9)
    P for trend0.010.01<0.010.01
  • NOTE: Both sexes combined.

  • * Results adjusted only for age.

  • Adjusted for age, BMI, smoking, alcohol drinking, salt intake, and occupation.

  • Reference category.

  • § Physical activity score calculated from a weighted sum of frequency, intensity, and duration among participants who reported a physical activity frequency of once a week or more.