Table 8.
Analysis of covariance for Gamma-glutamyl transpeptidase according to age, gender, anthropometric measures and tobacco and alcohol consumption (n = 1983)
| Variable | Parameter estimate (U/I) | 95% Confidence interval (U/I | p-value |
| Sex (male vs. female) | 6.86 | 5.42; 8.30 | < 0.001 |
| Age (years) | 0.14 | 0.08; 0.20 | < 0.001 |
| BMI (kg/m2) | 0.48 | 0.34; 0.63 | < 0.001 |
| Physical activity "to break a sweat" | 2.09 | 0.08; 3.49 | 0.004 |
| Smoking current vs. none | 2.07 | 0.01; 2.54 | |
| Smoking current vs. former non | 1.63 | 0.08; 1.72 | 0.036 |
| alcohol >40 g/day vs. none | 13.12 | 10.29; 15.94 | |
| alcohol >40 g/day vs. ≤ 20 g/day | 12.56 | 9.85; 15.26 | < 0.001 |
| alcohol >40 g/day vs. >20 g/day | 10.10 | 7.07; 13.13 | |
| alcohol ≤ 40 g/day |