Table 4.

Absolute numbers, proportions, IRs, proportions on overall time loss of the “Big 3” injuries and the “Top 10” diagnoses

Diagnosis	No. of injuries	Proportional frequency % [95% CI] n = 6653 injuries	IR per 1000 football hours [95% CI]	% of days lost
3 main football injuries
Thigh muscle injuries (non-contact)	1294	19.5 [18.5–20.4]	1.1 [1.0–1.1]	17.1
Ankle ligament injuries	390	5.9 [5.3–6.4]	0.3 [0.3–0.4]	8.3
Knee ligament injuries	273	4.1 [3.6–4.6]	0.2 [0.2–0.3]	15.4
10 most frequent diagnoses
Thigh muscle injury unspecified	537	8.1 [7.4–8.7]	0.4 [0.4–0.5]	2.2
Ankle sprain	390	5.9 [5.3–6.4]	0.3 [0.3–0.4]	8.3
Lower extremity incl. hip/groin muscle injury unspecified	359	5.4 [4.9–5.9]	0.3 [0.3–0.3]	1.4
Thigh muscle tear	348	5.2 [4.7–5.8]	0.3 [0.3–0.3]	8.5
Adductor muscle injury unspecified	317	4.8 [4.3–5.3]	0.3 [0.2–0.3]	1.5
Back problem	292	4.4 [3.9–4.9]	0.2 [0.2–0.3]	2.0
Thigh contusion	236	3.6 [3.1–4.0]	0.2 [0.2–0.2]	0.8
Ankle contusion	234	3.5 [3.1–4.0]	0.2 [0.2–0.2]	0.6
Knee injury unspecified	232	3.5 [3.1–3.9]	0.2 [0.2–0.2]	1.4
Foot contusion	186	2.8 [2.4–3.2]	0.2 [0.1–0.2]	0.6

CI confidence interval; IR injury incidence rate