- Jul 30, 2007
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Risk factors for acute endophthalmitis after cataract surgery: a population-based study. Ophthalmology. 2009 Mar;116(3):425-30 Authors: Hatch WV, Cernat G, Wong D, Devenyi R, Bell CM OBJECTIVE: To identify risk factors for suspected acute endophthalmitis after cataract surgery. DESIGN: Population-based retrospective cohort. PARTICIPANTS: Administrative data from more than 440,000 consecutive cataract surgeries in Ontario, Canada, from April 1, 2002, to March 31, 2006. METHODS: Consecutive physician billing claims for cataract surgery and specific intraoperative and postoperative procedures related to complications of cataract surgery were identified. Acute endophthalmitis was defined using surrogate markers for intraocular infection, including vitrectomy, vitreous injection, or aspiration procedures not in combination with air/fluid exchange or dislocated lens extraction, performed 1 to 14 days after cataract surgery. Anterior vitrectomy performed on the day of surgery was used as a surrogate marker for capsular rupture. MAIN OUTCOME MEASURES: Overall rates of endophthalmitis were calculated and grouped by patient demographics, surgical facility, season, year, and association with capsular rupture. RESULTS: There were 617 suspected acute endophthalmitis cases of 442,177 cataract surgeries over the 4 years. The overall unadjusted and adjusted rates of suspected acute endophthalmitis were both 1.4 per 1000 cataract surgeries. Men had higher rates than women (1.70 vs. 1.19/1000 surgeries, Por= 85 years) had the highest rate (2.18/1000), and the youngest group (20-64) had the second highest rate (1.76/1000). The endophthalmitis rates for these age groups were significantly different from those aged 65 to 84 years. The endophthalmitis rate was approximately 10-fold higher in those with capsular rupture compared with those without (13.11 vs. 1.34/1000, P
