Table 2.

Reliability Coefficients for Post-Concussive Symptoms

	Inter-Rater reliability						Test-Retest reliability: Child						Test-Retest reliability: Parent
Measures	R		SA		EC		R to SA		R to EC		SA to EC		R to SA		R to EC		SA to EC
	HC	pmTBI	HC	pmTBI	HC	pmTBI	HC	pmTBI	HC	pmTBI	HC	pmTBI	HC	pmTBI	HC	pmTBI	HC	pmTBI
PCSI
Total	0.39	0.13	0.24	0.70	0.38	0.55	0.85	0.56	0.50	0.58	0.61	0.33	0.67	0.28	0.50	0.17	0.55	0.24
Physical	0.64	0.13	0.36	0.75	0.50	0.46	0.75	0.54	0.28	0.49	0.52	0.23	0.78	0.21	0.62	0.23	0.64	0.23
Cognitive	0.30	0.04	0.32	0.52	0.16	0.37	0.83	0.51	0.38	0.47	0.43	0.27	0.78	0.29	0.44	0.21	0.43	0.24
Emotional	0.33	0.42	0.06	0.65	0.39	0.61	0.82	0.72	0.59	0.69	0.66	0.57	0.50	0.50	0.34	0.21	0.45	0.40
Fatigue	0.26	0.03	0.47	0.72	0.32	0.63	0.64	0.43	0.37	0.37	0.55	0.22	0.68	0.20	0.23	0.09	0.31	0.10

EC, early chronic; HC, healthy control; ICC, intraclass correlation coefficient; PCSI, Post-Concussion Symptom Inventory; pmTBI, pediatric mild traumatic brain injury; R, retrospective; SA, subacute.