Table 1.

Mean and SD of some variables possibly related to colorectal cancer in case and control subjects

Case subjects (n = 74)
Control subjects (n = 221)
P, χ2 or t test
MeanSDMeanSD
Age (years)58.49.658.09.6NS
Men/women (% for women)45/29(39.2%)134/87(39.4%)NS
BMI (kg/m2)23.02.923.02.7NS
Family history of colorectal cancer in parents and/or siblings, n (%)10 (13.5)11 (5.0)<0.05
Habitual exercise, n (%)
    High12 (16.2)61 (27.6)NS
    Moderate42 (56.8)111 (50.2)
    Low20 (27.0)49 (22.2)
Drinking status, n (%)
    Drinkers46 (62.2)123 (55.7)NS
    Ex-drinkers1 (1.4)6 (2.7)
    Nondrinkers27 (36.5)92 (41.6)
Smoking status, n (%)
    Smokers22 (29.7)53 (24.0)NS
    Ex-smokers24 (32.4)59 (26.7)
    Nonsmokers28 (37.8)109 (49.3)
Dietary intake
    Meat (g/1,000 kcal)17.310.517.211.5NS
    Fish (g/1,000 kcal)22.212.020.711.3NS
    Other seafood (g/1,000 kcal)16.510.219.814.3<0.05
    Green-yellow vegetables (g/1,000 kcal)34.423.932.520.7NS
    Energy from fat (%)23.46.323.87.0NS
    Total fat (g/1,000 kcal)26.07.026.47.8NS
        SFAs* (g/1,000 kcal)12.32.313.23.5<0.05
        MUFAs* (g/1,000 kcal)17.13.518.04.9NS
        PUFAs* (g/1,000 kcal)14.23.214.94.3NS
            n-6 PUFAs* (g/1,000 kcal)11.42.912.03.8NS
            n-3 PUFAs* (g/1,000 kcal)2.50.52.60.6NS
            n-3 HUFAs* (g/1,000 kcal)0.840.350.840.33NS
  • Abbreviation: NS, not significant.

  • * Dietary intakes of each fatty acid group were explained in Materials and Methods and mainly composed of the selected 13 fatty acids as follows: SFAs = 14:0 + 16:0 + 18:0; MUFAs = 16:1n-7 + 18:1n-9; PUFAs = n-6 PUFAs + n-3 PUFAs; n-6 PUFAs = 18:2n-6 + 18:3n-6 + 20:3n-6 + 20:4n-6 (AA); n-3 PUFAs = 18:3n-3 + n-3 HUFAs; and n-3 HUFAs = 20:5n-3 (EPA) + 22:5n-3 + 22:6n-3 (DHA).