| Event type | Number of events | Number and proportion (%) of events resulting in players requiring on-pitch medical attention | ||||
| Events penalised by match referee (%) | Events not penalised by match referee (%) | Events penalised by match referee | Events not penalised by match referee | |||
| Number | % (95% CI) | Number | % (95% CI) | |||
| Collision | 19 (2.6) | 723 (97.4) | 0 | 0 (–) | 13 | 1.8 (0.8–2.8)§ |
| Lineout | 110 (7.1) | 1450 (92.9) | 5 | 4.5 (0.7–8.4) | 6 | 0.4 (0.1–0.7)* |
| Maul (All) | 125 (13.6) | 796 (86.4) | 16 | 12.8 (6.9–18.7) | 41 | 5.2 (3.6–6.7)* |
| Not collapsed | 41 (13.5) | 263 (86.5) | 2 | 4.9 (0–11.5) | 9 | 3.4 (1.2–5.6)¶ |
| collapsed | 84 (15.8) | 533 (84.2) | 14 | 16.7 (8.7–24.6) | 32 | 6.0 (4.0–8.0)* |
| Ruck | 614 (8.6) | 6510 (91.4) | 47 | 7.7 (5.6–9.8) | 143 | 2.2 (1.8–2.6)* |
| Scrum | 183 (12.6) | 1264 (87.4) | 2 | 1.1 (0–2.6) | 31 | 2.5 (1.6–3.3)‡ |
| Not collapsed | 125 (10.4) | 1073 (89.6) | 0 | 0 (–) | 22 | 2.1 (1.2–2.9)† |
| collapsed | 58 (23.3) | 191 (76.7) | 2 | 3.4 (0–8.1) | 9 | 4.7 (1.7–7.7)** |
| Tackle | 147 (1.3) | 10 901 (98.7) | 11 | 7.5 (3.2–11.7) | 136 | 1.2 (1.0–1.5)* |
| All events | 1198 (5.2) | 21 644 (94.8) | 81 | 6.8 (5.3–8.2) | 370 | 1.7 (1.5–1.9)* |
*p<0.001; †p = 0.093; ‡p = 0.25; §p = 0.56; ¶p = 0.64; **p = 0.68.