Table 3.

Results of the linear multiple regression model (with stepwise variable selection procedure), dependent variable = mental component summary score of the SF-36 (MCS)

Covariates	βx-coefficient	se (βx)	p
β0	39.28	2.02	< 0.001
Age (+ 1 year) (β1)	0.05	0.02	0.012
Male gender (β2)	2.22	0.51	< 0.001
Income > 24,000 €/year (β3)	1.52	0.53	0.004
Household > 1 person (β7)	1.31	0.51	0.010
Hazardous alcohol consumption (β8)	-1.84	0.59	0.002
Illicit drug use (β9)	-2.74	0.64	< 0.001
Smoking (β10)	-0.87	0.52	0.097
ISS > 1 point (β11)	1.251	0.63	0.048

Model = β₀ + β₁ * age + β₂ * male gender + β₃ * A-level + β₄ * being employed + β₅ * income > 24,000€/year + β₆ *partnership + β₇ * household > 1 person + β₈ * hazardous alcohol consumption + β₉ * illicit drug use + β₁₀ * smoking + β₁₁ * ISS > 1 point.

A-Level: 12 or 13 years of school education, ISS = Injury Severity Score