Protocol for a multicenter prospective cohort study evaluating sport activity and development of femoroacetabular impingement in the adolescent hip

Table 4 Per group sample sizes. 80% power, alpha = 0.01, 2-sided testing

	FAI risk in non-sports specialists
	5%	15%	25%
FAI risk in sports specialists
20%	126	1388	1668
30%	61	193	1902
40%	38	81	240
50%	26	46	94

ISSN: 1471-2474