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Table 1 Socio-demographic characteristics in cases and controls.

From: Association of IL1B -511C/-31T haplotype and Helicobacter pylori vacA genotypes with gastric ulcer and chronic gastritis

   Cases  
Characteristic Controls (n = 102) Chronic gastritis (n = 100) Gastric ulcer (n = 28) p-value
Age (mean ± sd; years) 29.8 ± 11 46.1 ± 14.6 56.3 ± 17.1 <0.001
Gender n(%)     
   Female 65 (63.7) 64 (64) 19 (67.9) 0.917 θ
   Male 37 (36.3) 36 (36) 9 (32.1)  
Education [mean (range); years] 12 (12-17) 12 (6-17) 6 (0-12) <0.001
Geographical area n(%)     
   Chilpancingo 44 (43.1) 30 (30) 5 (17.9) 0.021 θ
   Other municipalities 58 (56.9) 70 (70) 23 (82.1)  
Family history of gastritis and/or ulcer n(%)     0.001 θ
   No 49 (48.0) 39 (39.0) 22 (78.6)  
   Yes 53 (52.0) 61 (61.0) 6 (21.4)  
Smoking habit n(%)     
   No 39 (38.2) 65 (65) 10 (35.7) <0.001θ
   Current smoker or former smoker 63 (61.8) 35 (35) 18 (64.3)  
Alcohol consumption n(%)     
   No 14 (13.7) 22 (22) 7 (25) 0.211 θ
Consumes or consumed 88 (86.3) 78 (78) 21 (75)  
  1. ANOVA test; Kruskal-Wallis test; θX2 Test; Ω Fisher's exact test