Prospective evaluation of the Quality of Life after Brain Injury (QOLIBRI) score: minor differences in patients with major versus no or mild traumatic brain injury at one-year follow up

Table 7 Multivariate regression analysis in relation to QOLIBRI total and cognition 1 year after trauma

Model	Variable	B	95% CI lower - upper		Beta	p	R	R²	R² controlled for age	R² change	F change	p change
	Dependent: QOLIBRI total
	(Constant)	94.94	83.46	106.42		< 0.001
1	Age at time of injury	−0.15	−0.31	0.01	−0.13	0.058	0.12	0.01		0.01	2.67	0.104
2	AIS 5 (extremities)	−4.17	−6.53	−1.82	−0.27	0.001	0.22	0.05	0.04	0.04	7.48	0.007
3	AIS head	−2.20	−4.09	−0.30	−0.18	0.024	0.27	0.07	0.06	0.02	5.21	0.024
	Dependent: QOLIBRI cognition
	(Constant)	101.29	87.41	115.18		< 0.001
1	Age at time of injury	−0.23	−0.42	−0.04	−0.17	0.015	0.15	0.02		0.025	5.14	0.024
2	AIS head	−3.71	−6.00	−1.41	−0.25	0.002	0.22	0.05	0.03	0.03	4.69	0.032
3	AIS 5 (extremities)	−3.90	−6.75	−1.06	−0.21	0.007	0.29	0.08	0.06	0.03	7.31	0.007

QOLIBRI: Quality of Life after Brain Injury; AIS: Abbreviated Injury Scale; B: non standardized beta (slope); CI: confidence interval; Beta: standardized beta (strength of the relationship), R: correlation coefficient; R²: explained variance; change: change of the additional variable entered into the model

ISSN: 1477-7525