TABLE 2.

Correlation Between ImPACT Composite Scores and Measures Administered at the Start of Vestibular Physical Therapy

	ImPACT Composite Measure
	Visual Memory	Reaction Time	Verbal Memory	Processing Speed	Total Symptom Score
Self-report measures (n)
Dizziness rating (58)	r = –0.15	rs = 0.03	r = –0.11	r = 0.11	r = 0.25
ABC (58)	r = 0.39†	rs = –0.35†	r = 0.32	r = 0.29	r = –0.35†
	P = 0.003	P = 0.007			P = 0.008
DHI (59)	r = –0.21	rs = 0.20	r = –0.23	r = –0.18	r = 0.39†
					P = 0.002
Balance performance measures (n)
FGA (54)	r = 0.40†	rs = –0.23	r = 0.44†	r = 0.31	r = –0.33
	P = 0.003		P = 0.001
GS (55)	r = 0.34†	rs = –0.06	r = 0.37†	r = 0.22	r = –0.30
	P = 0.012		P = 0.005
TUG (47)	rs = –0.09	rs = 0.22	rs = –0.16	rs = –0.23	rs = –0.01
FTSTS (46)	r = –0.38†	rs = 0.38†	r= –0.50†	r = –0.33	r = 0.30
	P = 0.010	P = 0.010	P < 0.001
SOT composite score (34)	rs = 0.40	rs = –0.15	rs = 0.20	rs = 0.16	rs = –0.25
SOT condition 1 (34)	r = 0.40	rs = –0.11	r = 0.32	r = 0.28	r = –0.25
SOT condition 2 (34)	r = 0.59†	rs = –0.35	r = 0.53†	r = 0.58	r = –0.48†
	P < 0.001		P = 0.001		P = 0.004
SOT condition 3 (34)	r = 0.53†	rs = –0.30	r = 0.58†	r = 0.34	r = –0.37
	P = 0.001		P < 0.001
SOT condition 4 (34)	r = 0.41	rs = –0.19	r = 0.37	r = 0.23	r = –0.28
SOT condition 5 (34)	r = 0.47†	rs = –0.12	r = 0.32	r = 0.17	r = –0.27
	P = 0.005
SOT condition 6 (34)	r = 0.39	rs = –0.07	r = 0.27	r = 0.12	r = –0.21

n, number of participants; condition 1, eyes open, fixed support; condition 2, eyes closed, fixed support; condition 3, sway-referenced vision, fixed support; condition 4, eyes open, sway-referenced support; condition 5, eyes closed, sway-referenced support; condition 6, sway-referenced vision and support surface, r_s, Spearman rank correlation coefficient, r, Pearson product-moment correlation coefficients.

^†Statistically significant.