Strabismus Surgery Reoperation Rates with Adjustable and Conventional Sutures

Purpose To determine the association of strabismus surgery reoperation rates with adjustable or conventional sutures. Design Retrospective cross-sectional study. Methods setting: Review of a large national private insurance database. study population: Adults aged 18-89 having strabismus surgery between 2007 and 2011. intervention: Adjustable vs conventional suture strabismus surgery. outcome measure: Reoperation rate in the first postoperative year. Results Overall, 526 of 6178 surgical patients had a reoperation (8.5%). Reoperations were performed after 8.1% of adjustable suture surgeries and after 8.6% of conventional suture surgeries (P =.57). Of the 4357 horizontal muscle surgeries, reoperations were performed after 5.8% of adjustable suture surgeries, and after 7.8% of conventional suture surgeries (P =.02). Of the 1072 vertical muscle surgeries, reoperations were performed after 15.2% of adjustable suture surgeries and after 10.4% of conventional suture surgeries (P =.05). Younger age (18-39 years) was associated with a lower reoperation rate (P ≤.02). The significant multivariable predictors of reoperation for horizontal surgery were adjustable sutures (odds ratio [OR] 0.69, 95% confidence interval 0.52-0.91), monocular deviation (OR 0.64), complex surgery (OR 1.63), and unilateral surgery on 2 horizontal muscles (OR 0.70, all P ≤.01). Adjustable sutures were not significantly associated with reoperation rates after vertical muscle surgery (multivariable OR 1.45, P =.07). Conclusions Adjustable sutures were associated with significantly fewer reoperations for horizontal muscle surgery. Adjustable sutures tended to be associated with more reoperations for vertical muscle surgery, but this observation was not statistically significant in the primary analysis after controlling for age.