Quintana JM, Alberdi T, Garay I, Andradas E, Agirre U, Aizpuru F; Health Technology Assessment International. Meeting (2nd : 2005 : Rome, Italy).
Ital J Public Health. 2005; 2: 219.
Hospital de Galdakao, Barrio Labeaga, Galdakao, Vizcaya, 48960 Spain E-mail: jmquinta@hgda.osakidetza.net
Introduction. A panel of experts using RAND methodology developed appropriateness explicit criteria for cataract extraction using the phacoemulsification technique. Since the criteria included 1071 clinical scenarios, a more simplified version of the results was needed to be used in clinical practice. Methodology: We used CART analysis (classification trees) to create decision trees, which can be useful. This way, we created three decision trees for the main chapter evaluated: simple cataract (SC); cataract with diabetic retinopathy (DR) and cataract with other ocular pathologies (OP). The following variables were entered in those 3 trees: visual acuity in the eye to undergo surgery, visual acuity in the contralateral eye, visual function, technical complexity, expected visual acuity and uni or bilateral cataract (type of cataract). We compared the results of these decision trees with the original results of the panel of experts to estimate the misclassification error induced by the CART analysis. Results: We present three decision trees for the main diagnosis chapters. Visual acuity in the eye to undergo surgery and visual function play a more relevant role on all trees. Type of cataract did not appear on some of the trees (SC) as well as visual acuity in the contralateral eye (OP). Misclassification error for SC was 0.052, 0.072 for DR and 0.042 for the OP group. Conclusions: The CART analysis helped us to summarise all the panel evaluation on three simple decision trees. Our results allow clinicians to indicate more appropriately the intervention, and can also help to managers or providers to evaluate clinical performance.
Publication Types:
Keywords:
- Cataract
- Cataract Extraction
- Decision Trees
- Diabetic Retinopathy
- Phacoemulsification
- Vision
- Visual Acuity
- surgery
- hsrmtgs
UI: 103141223
From Meeting Abstracts