Table A1.

Logistic regression model assessing risk factors of PCS twelve months after injury, separately for patients with and without head injury.

Characteristic	Group	Head Injury Patients		Non-Head Injury Patients
		Univariable OR (95% CI)	Multivariable> OR (95% CI)	Univariable OR (95% CI)	Multivariable OR (95% CI)
Age		0.990 (0.974; 1.007)	0.974 * (0.953; 0.995)	1.013 * (1.002; 1.023)	0.996 (0.984; 1.009)
Sex	Male	Ref		Ref
	Female	1.546 (0.875; 2.731)		1.204 (0.889; 1.632)
Living situation	Not Alone	Ref		Ref
	Alone	0.886 (0.469; 1.672)		1.314 (0.935; 1.846)
Educational level	Low	Ref	Ref	Ref	Ref
	Middle	0.832 (0.412; 1.682)	0.725 (0.321; 1.643)	0.641 * (0.442; 0.929)	0.730 (0.485; 1.098)
	High	0.586 (0.292; 1.175)	0.574 (0.259; 1.276)	0.534 * (0.362; 0.787)	0.627 * (0.410; 0.960)
Injury mechanism	Home and leisure accident	Ref	Ref	Ref	Ref
	Road traffic accident	1.090 (0.594; 2.001)	1.168 (0.574; 2.377)	1.452 * (1.023; 2.060)	1.349 (0.918; 1.982)
	Sports accident	0.500 (0.156; 1.604)	0.449 (0.116; 1.736)	0.483 * (0.268; 0.870)	0.714 (0.378; 1.351)
	Occupational accident	1.250 (0.291; 5.375)	2.046 (0.387; 10.810)	1.344 (0.750; 2.410)	1.422 (0.740; 2.734)
Number of injuries	1	Ref	Ref	Ref	Ref
	2	0.573 (0.299; 1.097)	0.745 (0.367; 1.513)	1.265 (0.840; 1.906)	1.053 * (1.021; 1.090)
	≥3	0.324 * (0.149; 0.704)	0.288 * (0.119; 0.694)	3.631 * (1.982; 6.652)	3.531 * (1.832; 6.805)
Chronic disease	No chronic disease
	1 chronic disease	2.894 * (1.513; 6.925)	3.531 * (1.707; 7.300)	2.240 * (1.562; 3.213)	2.342 * (1603; 3.423)
	2 or more chronic diseases	2.952 * (1.258; 6.925)	3.752 * (1.417; 9.932)	4.315 * (2.889; 6.446)	4.607 * (3.000; 7.075)
Length of hospital stay		1.064 * (1.006; 1.125)	1.079 * (1.012; 1.151)	1.065 * (1.033; 1.099)	1.055 * (1.021; 1.090)

* statistically significant.