Is there overutilisation of cataract surgery in England?

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Black, N. ; Browne, J. ; van der Meulen, J.H. ; Jamison, L. ; Copley, L.P. ; Lewsey, J. (2009)

<b>Objectives:</b> Following a 3.7-fold increase in the rate of cataract surgery in the UK between 1989 and 2004, concern has been raised as to whether this has been accompanied by an excessive decline in the threshold such that some operations are inappropriate. The objective was to measure the impact of surgery on a representative sample of patients so as to determine whether or not overutilisation of surgery is occurring.\ud \ud <b>Design:</b> Prospective cohort assessed before and 3 months after surgery.\ud \ud <b>Setting:</b> Ten providers (four NHS hospitals, three NHS treatment centres, three independent sector treatment centres) from across England.\ud \ud <b>Participants:</b> 861 patients undergoing first eye (569) or second eye (292) cataract surgery provided preoperative data of whom 745 (87%) completed postoperative questionnaires.\ud \ud <b>Main outcome measures:</b> Patient-reported visual function (VF-14); general health status and quality of life (EQ5D); postoperative complications; overall view of the operation and its impact.\ud \ud <b>Results:</b> Overall, visual function improved (mean VF-14 score increased from 83.2 (SD 17.3) to 93.7 (SD 13.2)). Self-reported general health status deteriorated (20.3% fair or poor before surgery compared with 25% afterwards) which was reflected in the mean EQ5D score (0.82 vs 0.79; p = 0.003). At least one complication was reported by 66 (8.9%) patients, though this probably overestimated the true incidence. If the appropriateness of surgery is based on an increase in VF-14 score of 5.5 (that corresponds to patients’ reporting being "a little better"), 30% of operations would be deemed inappropriate. If an increase of 12.2 (patients’ reports of being "much better") is adopted, the proportion inappropriate is 49%. Using a different approach to determining a minimally important difference, the proportion inappropriate would be closer to 20%. Although visual function (VF-14) scores were unchanged or deteriorated in 25% of patients, 93.1% rated the results of the operation as "good," "very good" or "excellent," and 93.5% felt their eye problem was "better." This partly reflects inadequacies in the validity of the VF-14.\ud \ud <b>Conclusions:</b> Improvement in the provision of cataract surgery has been accompanied by a reduction in the visual function threshold. However, methodological difficulties in measuring the impact of cataract surgery on visual function and quality of life mean it is impossible to determine whether or not overutilisation of cataract surgery is occurring.\ud \ud N Black1, J Browne1, J van der Meulen1, L Jamieson2, L Copley2 and J Lewsey3
  • References (35)
    35 references, page 1 of 4

    1. Naeim A, Keeler EB, Gutierrez PR, et al. Is cataract surgery cost-effective among older patients with a low predicted probability for improvement in reported visual functioning? Med Care 2006;44:982-9.

    2. Keenan T, Rosen P, Yeates D, et al. Time trends and geographical variation in cataract surgery rates in England: study of surgical workload. Br J Ophthalmol 2007;91:901-4.

    3. NHS Executive. Action on cataracts: good practice guidance. London: Department of Health, 2000.

    4. Wood CM. Surgery for cataract [editorial]. BMJ 2007;334:107.

    5. NHS Executive. Growing capacity: independent sector diagnosis and treatment centres. London: Department of Health, 2002.

    6. Wright CJ, Chambers GK, Robens-Paradise Y. Evaluation of indications for and outcomes of elective surgery. CMAJ 2002;167:461-6.

    7. Royal College of Ophthalmologists. Cataract surgery guidelines. London: RCOphth, 2004. http://rcophth.ac.uk/docs/publications/CataractSurgeryGuidelinesMarch 8. Steinberg EP, Tielsch JM, Stein OD, et al. The VF-14: An index of functional impairment in patients with cataract. Arch Ophthalmol 1994;112:630-38.

    9. Norregaard JC, Bernth-Petersen P, Alonso J, et al. Variation in indications for cataract surgery in the United States, Denmark, Canada, and Spain: results from the International Cataract Surgery Outcomes Study. Br J Ophthalmol 1998;82:1107-11.

    10. Espallargues M, Alonso J. Effectiveness of cataract surgery in Barcelona, Spain. J Clin Epidemiol 1998;51:843-52.

    11. Desai P. The outcomes of cataract surgery: the relationships between visual acuity, visual function and quality of life. PhD thesis. University of London, 1996.

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