Table 6.

Reported problems in studies evaluating followup of PAO

Author	Year	Hips	Female:male	Followup (years)	Complications (%)	Impingement (%)	HO (%)
Siebenrock et al. [28]	1999	75	58:17	11	17	29	5.6
Steppacher et al. [29]	2008	58	35:23	19	n.i.	38	n.i.
Myers et al. [24]	1999	5	4:1	3.6	n.i.	all	n.i.
Trousdale et al. [34]	1995	42	30:8	4	33	n.i.	14
Matta et al. [19]	1999	66	42:16	4	41	n.i.	17
Mayo et al. [20]	1999	19	10:8	3.8	37	n.i.	16
Clohisy et al. [4]	2005	16	11:2	4.3	13	n.i.	n.i.
Ziebarth et al. [current study]	2010	46	0:46	3.5	56	47	43

n.i. = no information available.