Table 4.

Hip survival in the present study (age at surgery ≥ 12 years) and in other recent studies, assessed as percentage of hips that have not undergone total hip arthroplasty according to duration of follow-up

Study	Treatment	Age (yrs), mean (range)	OA	Follow-up (yrs)	Hip survival (%)
Hirose et al 201114	Shelf acetabuloplasty	34 (17 to 54)	No	10	100
Present study	Spitzy shelf	16 (12 to 22)	No	10	100
Hirose et al 201114	Shelf acetabuloplasty	34	No	20	93
Present study	Spitzy shelf	16	No	20	100
Wells et al 20177	PAO	27 (10 to 45)	No	18	89
Wells et al 20177	PAO	27	OA	18	37
Hirose et al 201114	Shelf acetabuloplasty	34	No	32	71
Present study	Spitzy shelf	16	No	30	72
Lerch et al 20176	PAO	29 (13 to 56)	No	30	60
Lerch et al 20176	PAO	29	OA	30	14

Age, age at surgery; OA, preoperative osteoarthritis; No, no osteoarthritis; PAO, periacetabular osteotomy