Table 1.

Baseline characteristics of colorectal cancer cases and controls

Cases (%)Controls (%)P (χ2 test)
n161 (100.0)395 (100.0)
Male75 (46.6)187 (47.3)
Female86 (53.4)208 (52.7)
Age (y)
    40-4914 (8.7)36 (9.1)0.743
    50-5948 (29.8)131 (33.2)
    60-6965 (40.4)159 (40.3)
    70-7934 (21.1)69 (17.5)
Smoking habit
    Current smoker37 (23.0)96 (24.3)0.674
    Ex-smoker23 (14.3)51 (12.9)
    Nonsmoker93 (57.8)218 (55.2)
    Unknown8 (5.0)30 (7.6)
Drinking habit
    Current drinker75 (46.6)168 (42.5)0.503
    Ex-drinker2 (1.2)12 (3.0)
    Nondrinker78 (48.4)195 (49.4)
    Unknown6 (3.7)20 (5.1)
Family history of colorectal cancer
    Yes10 (6.2)14 (3.5)0.161
    No151 (93.8)381 (96.5)
Intake frequency of green leafy vegetables
    1-2 times/mo or less23 (14.3)57 (14.4)0.100
    1-2 times/wk or more126 (78.3)325 (82.3)
    Unknown12 (7.5)13 (3.3)
Time spent in sport or physical exercise
    Little97 (60.2)247 (62.5)0.591
    1 h/wk or more57 (35.4)125 (31.6)
    Unknown7 (4.3)23 (5.8)