Table 5

Frequency and percentage of descriptors for concussive event (C) and non-injury event (NI) during aerial collision and ruck

Aerial collision	C (n)	Per cent	NI (n)	Per cent	Ruck	C (n)	Per cent	NI (n)	Per cent
Number of players involved					Role at ruck: player of interest
2	1	100	0	0	Ball-carrier	1	25	5	8
3	0	0	2	67	Jackal	1	25	6	10
4	0	0	0	0	Support attack	0	0	26	43
5	0	0	1	33	Support defence	2	50	24	39
Number of attackers					Number of players on attack
1	1	100	2	67	1–2	1	25	10	16
2	0	0	0	0	3–5	3	75	49	80
3	0	0	1	33	6–8	0	0	2	3
Number of defenders					Number of players on defence
1	1	100	0	0	0	0	0	3	5
2	0	0	3	100	1–2	2	50	32	52
					3–5	2	50	26	43
Awareness of impending contact: attacking player					Activity at ruck: attack
Yes	0	0	3	100	Clearing the ruck	3	75	32	52
No	1	100	0	0	Protecting the ball	1	25	29	48
Awareness of impending contact: defensive player					Activity at the ruck: defence
Yes	0	0	3	100	Competing for the ball	3	75	43	70
No	1	100	0	0	Support	1	25	10	13
					No active engagement	0	0	8	16
Speed of defensive player					Infringement
Slow	0	0	0	0	No	3	75	50	82
Moderate	0	0	3	100	Yes	1	25	11	18
Fast	1	100	0	0
Speed of attacking player					Attacker possession
Slow	0	0	3	100	Maintained possession	4	100	55	90
Moderate	0	0	0	0	Lost possession	0	0	6	10
Fast	1	100	0	0
Impact
Low	0	0	3	100
Medium	0	0	0	0
High	1	100	0	0
First body region in contact: attacking player
Head/face	0	0	0	0
Neck	0	0	0	0
Shoulder/arms	0	0	1	33
Torso	0	0	1	33
Hips and below	1	100	0	0
Inconclusive	0	0	1	33
First body region in contact: defensive player
Head/face	1	100	0	0
Neck	0	0	0	0
Shoulder/arms	0	0	1	33
Torso	0	0	2	67
Hips and below	0	0	0	0
Inconclusive	0	0	0	0
Body position
Controlled	1	100	3	100
Uncontrolled	0	0	0	0
Relative position of attacker/defender
Attacker higher than defender	1	100	2	67
Defender higher than attacker	0	0	0	0
Same level	0	0	1	33
Lands on feet/stable
Yes	0	0	3	100
No	1	100	0	0
Who gained possession of the ball
Attacker	0	0	0	0
Defender	0	0	1	100
Infringement
Yes	0	0	0	0
No	1	100	3	100