performed in 13/35 patients. Ipsilateral hip failure or contralateral hip subluxation was observed in 51% (18/35) patients. Contralateral hip subluxation developed in 28% (10/35) of patients. Ipsilateral hip failure was observed in 34% (12/35) patients. Four had both ipsilateral failure and contralateral subluxation. Lack of contralateral hip soft-tissue release, reversal of pelvic obliquity angle, and high initial contralateral hip FMI (> 25%) significantly predicted the risk of contralateral hip subluxation (P = 0.03). Similarly, persistence or worsening of preoperative pelvic obliquity significantly predicted ipsilateral hip failure (P < 0.04). There was a strong trend toward contralateral hip subluxation in patients below 8 years of age (P = 0.1) and ipsilateral hip failure in those who had spinal fusion surgery for scoliosis (P = 0.06).
CONCLUSIONS: Predictors of contralateral hip subluxation included lack of contralateral soft-tissue release, reversal of pelvic obliquity angle, and larger initial contralateral hip FMI (> 25%). The only predictor of ipsilateral failure was persistence or worsening of preoperative pelvic obliquity.

PMID: 23389573 [PubMed - indexed for MEDLINE]

Read more... http://www.ncbi.nlm.nih.gov/pubmed/23389573?dopt=Abstract