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. Author manuscript; available in PMC: 2022 Jan 18.
Published in final edited form as: Brain Inj. 2021 Jan 17;35(2):226–232. doi: 10.1080/02699052.2021.1871951

Table 1.

Groupwise participant demographics

Control Group
(n = 214)		 Concussion Group
(n = 297)		 p-value1 Prolonged Recovery Group (n = 26) p-value2
Age in years 14.96 ± 1.5 15.04 ± 1.7 0.555 15.26 ± 1.7 0.628
Sex 58.4% male (n = 125) 58.6% male (n = 174) 0.968 46.2% male (n = 12) 0.266
Body Mass Index in kgm−2 22.2 ± 4.7 22.4 ± 4.5 0.764 23.1 ± 4.3 0.722
Previous Concussions 0.10 ± 0.3 0.62 ± 1.0 < 0.001 0.58 ± 0.8 0.842
History of Orthostatic Hypotension 0.5% (n = 1) 1.4% (n = 4) 0.319 0% (n = 0) 0.466
Days since injury to first visit - 5.98 ± 3.0 - 5.64 ± 3.0 0.021
Days since injury to last visit 46.27 ± 41.9 - > 120 -
Sport-related injury - 79.4% (n = 235) - 46.2% (n = 12) < 0.001
Initial Visit symptom severity* - 31.8 ± 19.6 - 29.8 ± 28.7 0.738
*:

symptom severity on Post-Concussion Symptom Scale (max = 132)

1

= p-value of comparison between Control Group and Concussion Group

2

= p-value of comparison between Concussion Group and Prolonged Recovery Group.