Appendix Table A7.

Logistic regression results for the null model, where age, sex, Post-Concussion Symptom Inventory (PCSI) total score, and self-reported prior history of concussion are predictor variables and concussion status is the outcome variable.

Outcome measure	β coefficient	Standard error	95% Confidence Interval	P value	Odds Ratio (95% CI)
Age	0.12	0.09	0.94, 1.35	.21	1.12 (0.94, 1.35)
Sex	0.53	0.28	0.98, 2.92	.05	1.70 (0.99, 2.92)
PCSI total score	0.09	0.01	1.07, 1.13	< .001	1.10 (1.07, 1.13)
Prior history of concussion	0.75	0.28	1.22, 3.70	.007	2.13 (1.22, 3.70)

Bold values are significant.