Table I.
Comparison of basic demographic characteristics between patients who were retained in the study and those who were excluded because of incomplete data.
| Characteristic | Retained (n = 250) |
Excluded (n = 43) |
p-value |
|---|---|---|---|
| Mean age, yrs (SD) | 42.1 (7.9) | 43.0 (11.5) | 0.614* |
| Male sex, n (%) | 154 (61.6) | 28 (65.1) | 0.788† |
| Mean BMI, kg/m2 (SD) | 24.2 (2.4) | 24.6 (3.4) | 0.423* |
| Intensity of physical labour, n (%) | 0.557† | ||
| None | 20 (8.0) | 5 (11.6) | |
| Light | 58 (23.2) | 7 (16.3) | |
| Moderate | 102 (40.8) | 16 (37.2) | |
| Heavy | 70 (28.0) | 15 (34.9) | |
| Smoking habits, n (%) | 0.485† | ||
| Never | 91 (36.4) | 15 (34.9) | |
| Former | 8 (3.2) | 3 (7.0) | |
| Current | 151 (60.4) | 25 (58.1) | |
| Drinks alcohol, n (%) | 0.297† | ||
| Never | 126 (50.4) | 20 (46.5) | |
| Former | 36 (14.4) | 3 (7.0) | |
| Occasionally | 44 (17.6) | 12 (27.9) | |
| Regularly | 44 (17.6) | 8 (18.6) | |
| Comorbidities, n (%) | 0.454† | ||
| None | 42 (16.8) | 8 (18.6) | |
| One | 141 (56.4) | 20 (46.5) | |
| Two or more | 67 (26.8) | 15 (34.9) |
*
Independent-samples t-test.
†
Chi-squared test.