Table 1

Distribution of selected subject characteristics by availability of slides for tumor staining among cases in a population-based case-control study of esophageal and gastric cancer in Connecticut, New Jersey, and Washington, 1993–1995

CharacteristicCases without slides available N = 513 (44.9%)Cases with slides available N = 630 (55.1%)χ-square P-value
Geographic center0.001
 Connecticut208 (57.5%)154 (42.5%)
 New Jersey170 (32.6%)352 (67.4%)
 Washington135 (52.1%)124 (47.9%)
Age (in years)0.237
 <5059 (48.8%)62 (51.2%)
 50–5986 (46.5%)99 (53.5%)
 60–69172 (47.4%)191 (52.6%)
 70–79196 (41.4%)278 (58.7%)
Sex0.465
 Male398 (44.3%)500 (55.7%)
 Female115 (46.9%)130 (53.1%)
Race0.836
 Black43 (47.8%)47 (52.2%)
 Others17 (46.0%)20 (54.0%)
 White453 (44.6%)563 (55.4%)
Cigarette smoking0.603
 Never114 (46.3%)132 (53.7%)
 Ever399 (44.5%)498 (55.5%)
Alcohol intake0.371
 Never123 (47.3%)137 (52.7%)
 Ever390 (44.2%)493 (55.8%)
Body mass index (in quartiles)a0.468
 <23.01131 (46.1%)153 (53.9%)
 23.01–25.06122 (48.0%)132 (52.0%)
 25.06–27.29117 (41.8%)163 (58.2%)
 27.29+139 (43.4%)181 (56.6%)
NSAIDb use0.638
 Never325 (43.9%)415 (56.1%)
 Ever168 (45.4%)202 (54.6%)
  • a Quartiles based on distribution in controls (males and females combined).

  • b NSAID, nonsteroidal anti-inflammatory drug.