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Looking at outcomes important to patients may improve results of cataract surgery

Philadelphia, Pa. (August 29, 2013) - Cataract surgery can lead to good results from a clinical standpoint yet have poor outcomes from the patient's point of view, reports a study, "Analyzing Patient-Reported Outcomes to Improve Cataract Care", appearing in the August issue of Optometry and Vision Science, official journal of the American Academy of Optometry. The journal is published by Lippincott Williams & Wilkins, a part of Wolters Kluwer Health.

Using well-designed and validated tools to assess patient-reported outcomes can lead to new insights for improving the results of cataract care, suggests the study by Mats Lundstrm, MD, PhD, of Lund University and Ulf Stenevi, MD, PhD, of Sahlgren's University Hospital, Sweden. Their paper is part of a special theme issue on "Measuring the Patient's Perspective" in optometry research and clinical practice.

Study Compares Clinical and Patient-Reported Outcomes of Cataract Surgery

Using a nationwide registry, Drs Lundstrm and Stenevi evaluated clinical and patient-reported outcome measures in nearly 10,000 cataract surgeries performed in Sweden between 2001 and 2011. For example, a major clinical outcome measure after cataract surgery is visual acuity. But improved visual acuity may not always reflect patient ratings of change in vision from before to after the procedureespecially in performing everyday functional tasks.

Not surprisingly, a comparison of the two sets of outcomes found that patient-reported measures were affected by clinical measures. Factors affecting patient-reported outcomes included visual acuity in both the operated and nonoperated eyes, change in visual acuity in the operated eye, and any other eye-related conditions ("ocular comorbidity").

However, more useful information was gained by looking at factors related to better or worse patient-reported outcomes. For example, patients who reported better visual function before surgery or who had poor visual acuity in the nonoperated eye were more likely to have poorer patient-reported outcomes after cataract surgery.

Implications for Decisions about Cataract Care

Ocular comorbidity was also related to worse patient-reported outcomes. These findings may indicate that, as in other chronic diseases, "some patients are too healthy and some too sick to benefit" from cataract surgery, Drs Lundstrm and Stenevi write. "It is possible that patients who are very satisfied with their vision and have no problems in performing daily life activities should not have cataract surgery at present."

The study also looked at situations where the clinical outcomes were good but patient-reported outcomes were poorwhich happened in about seven percent of cataract surgeries. In many of these cases, poor near vision after the procedure was a major contributor to patient dissatisfaction.

There's a growing emphasis on patient-reported outcomes and quality of life in assessing various medical or surgical treatments. But there's been little attention to linking patient-reported outcomes to clinical outcomes in an attempt to improve health care. Age-related cataract is a good model for quality outcome studies: it is a very common, progressive condition that affects daily life and activities, and one for which surgical treatment is effective.

The new study helps vision care professionals in understanding how patient-reported outcome measures might be used to improve on the results of cataract surgery from the patient's perspective. For example, Drs Lundstrm and Stenevi suggest that surgery could be delayed or not performed in patients who feel they aren't having a lot of problems with daily activitiesperhaps especially if they have good near vision.

The special theme issue presents 20 papers on topics related to the use of patient-reported outcomes in vision care. "These papers focus on new tools that are being increasingly used to assess the patient's perspective on a wide range of important conditions, problems, and outcomes," comments Anthony Adams, OD, PhD, Editor-in-Chief of Optometry and Vision Science. "These measures allow us to rigorously measure the outcomes important to patients, and to do so in a very meaningful way."


Contact: Connie Hughes
Wolters Kluwer Health

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