Table 1.

Distribution of demographic and other characteristics in cases and controls, Warsaw, Poland, 1994-1996

Cases (n = 305)Controls (n = 427)P
Age, mean ± SD63.0 ± 10.563.7 ± 10.60.36
Gender, n (%)
    Male202 (66.2)276 (64.6)
    Female103 (33.8)151 (35.4)0.66
Education, n (%)
    ≤High school144 (47.2)160 (37.5)
    Some college104 (34.1)144 (33.7)
    ≥College graduate57 (18.7)123 (28.8)<0.01
Family history of stomach cancer, n (%)
    No257 (87.7)402 (95.7)
    Yes36 (12.3)18 (4.3)<0.0001
Alcohol drinking, n (%)
    Nondrinkers107 (35.9)141 (33.0)
    Former drinkers97 (32.6)62 (14.5)
    Current drinkers94 (31.5)224 (52.5)<0.0001
Frequency of alcohol drinking, n (%)
    Nondrinkers107 (35.4)141 (33.2)
    <7 drinks per week124 (41.1)224 (52.7)
    ≥7 drinks per week71 (23.5)60 (14.1)0.001
Drinks per week, mean ± SD5.92 ± 14.863.30 ± 6.000.001
Dietary folate intake (μg/d), mean ± SD317.65 ± 90.25310.37 ± 90.620.31
Total caloric intake (kcal), mean ± SD2861.67 ± 817.802820.93 ± 788.510.52
Smoking, n (%)
    Nonsmokers87 (33.9)170 (39.8)
    Former smokers90 (39.5)138 (32.3)
    Current smokers126 (51.4)119 (27.9)<0.001
Weekly frequency of raw vegetable and fruit intake, n (%)
    Q1 (<5.5)62 (24.1)84 (20.3)
    Q2 (5.6-9.7)87 (33.9)112 (27.1)
    Q3 (9.8-13.9)57 (22.2)109 (26.4)
    Q4 (≥14.0)51 (19.8)108 (26.2)0.06
Body mass index (kg/m2), n (%)
    <25129 (42.3)194 (45.4)
    ≥25176 (57.7)233 (54.6)0.40
Lauren classification, n (%)
    Intestinal206 (67.5)
    Diffuse50 (16.4)
    Indeterminate32 (10.5)
    Unknown/missing17 (5.6)
Location within stomach, n (%)
    Cardia35 (11.5)
    Distal stomach223 (73.1)
    Combined36 (11.8)
    Unknown/missing11 (3.6)