Table 1.

Baseline characteristics stratified by case-control status

Continuous variablesCasesControlsP*
Age at blood draw (y), median (5th-95th percentile)59.8 (49.6-60.5)59.8 (49.7-60.4)0.37
BMI (kg/m2), median (5th-95th percentile)25.9 (21.6-31.3)25.8 (21.4-32.5)0.2
Height (cm), median (5th-95th percentile)176 (167-190)176 (166-186)0.56
Discrete variablesPtest indicating the difference in frequencies between cases and controls.
Educational attainment, n (%)Primary school408 (75%)805 (77%)0.46
Secondary school65 (12%)104 (10%)
University degree73 (13%)138 (13%)
Marital status, n (%)Married or cohabiting489 (87%)896 (84%)0.09
Not married nor cohabiting70 (13%)166 (16%)
Smoking, n (%)Never242 (45%)533 (52%)0.03
Ever141 (26%)236 (23%)
Current153 (29%)254 (25%)
Physical activity, n (%)Inactive99 (21%)200 (21%)0.97
Moderately inactive208 (43%)405 (43%)
Active174 (36%)344 (36%)
Alcohol intake, n (%)<8 g/d249 (70%)462 (70%)0.44
8-15 g/d86 (24%)147 (22%)
15-39 g/d19 (5%)52 (8%)
> 40 g/d1 (0%)1 (0%)
  • * P values assessed by Wilcoxon signed rank test indicating the difference in characteristics between cases and controls.

  • P values assessed by χ.