Table 3: Implementation of preventive measures at time of injury and injury incidence by players of different amateur levels (n=518).

	Core strength training		General strength training		exposure time	Injury incidence per 1000 hours
	%	95%-CI	%	95%-CI	hours/week	inc.	95%-CI
1st-3rd amateur leagues (n=127)	85.9	79.8-92.0	82.7	76.1-89.3	6.3	8.5	7.5-9.6
4th-5th amateur leagues (n=167)	68.9	61.9-75.9	63.5	56.2-70.8	5.0	9.4	8.1-11.1
30+/40+ leagues (n=81)	46.9	36.0-57.8	44.4	33.6-55.2	2.8	18.7	14.4-23.9
Junior leagues (n=66)	56.1	44.1-68.1	71.2	60.3-82.1	6.3	6.7	6.0-7.4
Women’s leagues (n=35)	68.6	53.2-84.0	74.3	59.8-88.8	5.4	8.2	6.0-11.3
Other (n=42)	55.6	41.1-70.1	37.8	23.6-52.0	2.9	15.6	12.6-18.9