Table 4.

Hierarchical regression models

Potential predictor	Coefficient beta	B (95% CI)	B SE
Model 1
Sex	−0.10	−0.47 (−6.22 to 5.28)	2.90
Age	−0.03	−0.03 (−0.16 to 0.10)	0.06
QoL	0.13	0.15 (−0.07 to 0.36)	0.11
Concussion symptoms	0.23	0.28 (−0.06 to 0.62)	0.17
Depression symptoms	0.65	1.57 (0.97 to 2.17)*	0.30
Model 2
Sex	−0.01	−0.51 (−6.13 to 5.11)	2.84
Age	−0.03	−0.03 (−0.16 to 0.09)	0.06
QoL	0.13	−0.15 (−0.07 to 0.36)	0.11
Concussion symptoms	0.18	0.22 (−0.12 to 0.56)	0.17
Depression symptoms	0.69	1.67 (1.08 to 2.26)*	0.30
GCS† (mild/moderate/severe)	−0.08	−1.86 (−4.67 to 0.96)	1.42
Marshall grade†	−0.12	−1.73 (−3.45 to 0.01)*	0.87

*Statistically significant p<0.05.

†Second level of hierarchical regression (routinely recorded brain injury factors).

GCS, Glasgow Coma Scale; QoL, quality of life.