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. 2016 Jan;8(1):37–42. doi: 10.1177/1941738115591948

Table 3.

Two weeks/3 months after injury, what are the health risks associated with the gradual advancement of physical and cognitive activities in the patient who continues to experience postconcussion symptoms?

2 Weeks After Injury, n (%)a 3 Months After Injury, n (%)a P Valueb
Lowered threshold for repeat concussion 349 (61) 263 (46) <0.001
Worsening of current symptoms 459 (80.2) 320 (55.9) <0.001
Delayed recovery from current concussion 443 (77.4) 273 (47.7) <0.001
Second impact syndrome 268 (46.9) 138 (24.1) <0.001
There are no potential health risks related to activity and postconcussion symptoms 17 (3) 84 (14.7) <0.001
a

Excludes respondents who reported that they did not know (n = 22 at 2 weeks, n = 55 at 3 months) and those who marked “other” (n = 32 at 2 weeks, n = 48 at 3 months).

b

Boldfaced P values indicate statistical significance.