TY - JOUR T1 - The UK Diabetic Retinopathy Electronic Medical Record (UK DR EMR) Users Group, Report 2: real-world data for the impact of cataract surgery on diabetic macular oedema JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 1673 LP - 1678 DO - 10.1136/bjophthalmol-2016-309838 VL - 101 IS - 12 AU - Alastair K Denniston AU - Usha Chakravarthy AU - Haogang Zhu AU - Aaron Y Lee AU - David P Crabb AU - Adnan Tufail AU - Clare Bailey AU - Toks Akerele AU - Sahar Al-Husainy AU - Christopher Brand AU - Louise Downey AU - Alan Fitt AU - Rehna Khan AU - Vineeth Kumar AU - Aires Lobo AU - Sajjad Mahmood AU - Kaveri Mandal AU - Martin Mckibbin AU - Geeta Menon AU - Salim Natha AU - Jong Min Ong AU - Marie D Tsaloumas AU - Atul Varma AU - Elizabeth Wilkinson AU - Robert L Johnston AU - Catherine A Egan A2 - , Y1 - 2017/12/01 UR - http://bjo.bmj.com/content/101/12/1673.abstract N2 - Aim To assess the rate of ‘treatment-requiring diabetic macular oedema (DMO)’ in eyes for the two  years before and after cataract surgery.Methods Multicentre national diabetic retinopathy (DR) database study with anonymised data extraction across 19 centres from an electronic medical record system. Inclusion criteria: eyes undergoing cataract surgery in patients with diabetes with no history of DMO prior to study start. The minimum dataset included: age, visual acuity (all time-points), injection episodes, timing of cataract surgery and ETDRS grading of retinopathy and maculopathy. Main outcome measure: rate of developing first episode of treatment-requiring DMO in relation to timing of cataract surgery in the same eye.Results 4850 eyes met the inclusion criteria. The rate of developing treatment-requiring DMO in this cohort was 2.9% in the year prior to surgery versus 5.3% in the year after surgery (p<0.01). The risk of ‘treatment-requiring DMO’ increased sharply after surgery, peaking in the 3–6 months' period (annualised rates of 5.2%, 6.8%, 5.6% and 4.0% for the 0–3, 3–6, 6–9 and 9–12 months' post-operative time periods respectively). Risk was associated with pre-operative grade of retinopathy: risk of DMO in the first year post-operatively being 1.0% (no DR pre-operatively), 5.4% (mild non-proliferative diabetic retinopathy; NPDR), 10.0% (moderate NPDR), 13.1% (severe NPDR) and 4.9% (PDR) (p<0.01).Conclusions This large real-world study demonstrates that the rate of developing treatment-requiring DMO increases sharply in the year after cataract surgery for all grades of retinopathy, peaking in the 3–6 months' postoperative period. Patients with moderate and severe NPDR are at particularly high risk. ER -