Never married | Married | Divorced, separated, widowed | p Value for homogeneity | |
---|---|---|---|---|
*Percentages, means, and p values adjusted (unless stated otherwise) for age and sex by direct standardisation to the study population (categorical variables), or by analysis of covariance (continuous variables). p Values calculated by the Mantel-Haenszel χ2 test for association (categorical variables) or analysis of covariance (continuous variables). | ||||
†Data on marital status missing for 38 participants. | ||||
‡Standardised for sex only. | ||||
§Standardised for age only (in the case of work related driving, additional standardisation for sex was not possible because of sparse data). | ||||
∥Total estimated driving exposure between 1988 and 1998; not standardised for either age or sex since this variable was estimated from age and sex. | ||||
Number of participants† | 1481 | 7766 | 1240 | |
Age, mean (SD), years‡ | 30.7 (13.9) | 44.9 (15.3) | 55.4 (13.6) | <0.0001 |
Men, %§ | 67.2 | 75.7 | 53.0 | <0.0001 |
Maximum alcohol intake, mean (SD), drinks/day | 8.4 (7.6) | 5.8 (7.9) | 7.5 (7.3) | <0.0001 |
Total estimated driving exposure, mean (SD), 000 km∥ | 103 (44) | 115 (44) | 76.2 (44) | <0.0001 |
Much work related driving, %§ | 2.9 | 2.5 | 3.0 | 0.45 |
Resident in rural area, % | 15.4 | 21.4 | 17.2 | <0.0001 |
Occupational status score, mean (SD)† | 43.1 (17.5) | 46.9 (18.3) | 43.7 (17.3) | <0.0001 |
Body mass index, mean (SD), kg/m2 | 25.3 (4.5) | 26.2 (4.6) | 25.8 (4.3) | <0.0001 |
Workforce cohort, % | 75.0 | 76.9 | 72.1 | <0.0001 |