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Table 1: Demographics by study group^{^a}
No PTH PTH P Value
Age (yr) 17.08 (2.99) 17.58 (5.87) .7
ImPACT total symptom score 37.46 (24.87) 29.20 (24.65) .2
% Male 254% 278% .09
% Prior concussion 29% 250% .12
Time to recovery (days) 56 (70) 55 (57) .98
↵a Data are mean (SD) unless otherwise noted.
	No PTH	PTH	P Value
Age (yr)	17.08 (2.99)	17.58 (5.87)	.7
ImPACT total symptom score	37.46 (24.87)	29.20 (24.65)	.2
% Male	254%	278%	.09
% Prior concussion	29%	250%	.12
Time to recovery (days)	56 (70)	55 (57)	.98