Concussion Incidence and Recurrence in Professional Australian Football Match-Play: A 14-Year Analysis

Table 1

Descriptive results for concussion incidence considering time of season, environmental conditions, loss of consciousness, and return to play ( players).

Condition (number of games)	Number of concussions	Incidence rate per 1000 pmh (95% CI range)
Total (333)	140	17.6 (14.77–20.72)
Regular season (308)	130	17.6 (14.73–20.94)
Finals (25)	10	16.7 (8.01–30.70)
Day (183)	73	16.6 (13.03–20.90)
Night (150)	67	18.6 (14.42–23.64)
Wet (52)	13	10.4 (5.55–17.81)
Dry (281)	127	18.8 (15.70–22.41)
Loss of consciousness concussion	17	2.1 (1.24–3.41)
Non-loss of consciousness concussion	123	15.4 (12.82–18.41)
Did not return to play in same game	27
Cleared and returned to play in same game	113
(i) Returned to play for 1 quarter	48
(ii) Returned to play for 2 quarters	32
(iii) Returned to play for 3 quarters	33

Note. pmh: player match hours.