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Table 1 Characteristics of case and control groups

From: Dietary patterns and colorectal cancer: results from a Canadian population-based study

Variables Cases (n = 506) n (%) Controls (n = 673) n (%) p-value
Gender    
  Male 306 (60.47%) 400 (59.44%)
  Female 200 (39.53%) 273 (40.56%)
Level of education    <0.0001
  Less than 11 years 246 (48.71%) 210 (31.44%)
  High school graduate 75 (14.85%) 103 (15.42%)
  Vocational or technical school/college 141 (27.92%) 247 (36.98%)
  Bachelor/graduate degree 43 (8.51%) 108 (16.17%)
Marital status    
  Single/never married 30 (5.93%) 22 (3.27%)
  Separated, divorced or widowed 80 (15.81%) 100 (14.86%)
  Currently married or living as married 396 (78.26%) 548 (81.43%)
Household income (per year)    <0.0001
  Less than $12,000 40 (8.59%) 43 (7.20%)
  $12,000-$19,999 181 (40.49%) 185 (30.99%)
  $30,000-$49,000 132 (29.53%) 163 (27.30%)
  More than $50,000 94 (21.03%) 206 (34.51%)
Body mass index (kg/m 2 )    0.004
  15-18.5 7 (1.42%) 2 (0.30%)
  18.5-25 135 (27.38%) 205 (31.20%)
  25-30 206 (41.78%) 306 (46.58%)
  More than 30 145 (29.41%) 144 (21.96%)
Physical activity (hours/week)    0.037
  0-7.4 140 (27.72%) 166 (25.08%)
  7.4-22.4 90 (17.82%) 148 (22.36%)
  22.4-53.0 96 (19.01%) 151 (22.81%)
  More than 53.0 179 (35.45%) 197 (29.76%)
Family history of colorectal cancer 54 (10.67%) 55 (8.18%)
Polyp 240 (48.29%) 85 (12.98%) <0.0001
Diabetes 107 (21.15%) 89 (13.40%) 0.0004
High cholesterol/triglycerides 169 (33.47%) 258 (38.39%)  
Crohns disease or colitis 12 (2.42%) 13 (2.00%)  
Any colon screening procedure 65 (12.85%) 145 (21.55%) 0.0001
Smoking status 367 (72.53%) 422 (62.70%) 0.0004
Alcohol use 301 (59.49%) 379 (56.32%)  
Multivitamin use 101 (20.08%) 146 (21.82%)  
Non-steroidal anti-inflammatory drug use 167 (33.07%) 260 (38.75%) 0.045
  1. Significant level at 0.05; non-significant p-values are not shown.