TABLE 11.

Chi square analysis of independent variable effects on symptom improvement among various subgroups of PPCS patients.

		Symptom improvement?
Treatment group		No	Yes	χ2 (df, N)	Asymptotic sig. (2-sided)	Fisher’s Exact Test (2-sided)
		Count (Expected)	Count (Expected)
All PPCS	Age range			7.062 (2, 59)	0.029	–
	<25 y.o.	0 (0.8)	9 (8.2)
	25–65 y.o.	1 (2.8)	32 (30.2)
	65+ y.o.	4 (1.4)	13 (15.6)
TAU	History of multiple concussions			4.342 (1, 26)	0.037	0.072
	No	1 (2.8)	17 (15.2)
	Yes	3 (1.2)	5 (6.8)
TAU+ILF	Pre-injury anxiety			5.775 (1, 33)	0.016	0.152
	No	0 (0.8)	28 (27.2)
	Yes	1 (0.2)	4 (4.8)
	History of or current substance dependence			15.984 (1, 33)	<0.001	0.061
	No	0 (0.9)	31 (30.1)
	Yes	1 (0.1)	1 (1.9)
TAU+ILF-CP	Age range			8.000 (2, 8)	0.018	–
	<25 y.o.	0 (0.1)	1 (0.9)
	25–65 y.o.	0 (0.8)	6 (5.3)
	65+ y.o.	1 (0.1)	0 (0.9)