نتایج جستجو برای: standard errors
تعداد نتایج: 642047 فیلتر نتایج به سال:
BACKGROUND To determine the change in refractive error and the incidence of myopia among school-aged children in the Yongchuan District of Chongqing City, Western China. METHODS A population-based cross-sectional survey was initially conducted in 2006 among 3070 children aged 6 to 15 years. A longitudinal follow-up study was then conducted 5 years later between November 2011 and March 2012. R...
PURPOSE To evaluate the performance of the hand-held and table-top autorefractokeratometer in measuring refractive errors by comparing them with cycloplegic retinoscopy. METHODS Included in the study were 112 eyes of 112 pediatric patients whose mean age was 6.78 ± 2.61 years (range, 2 to 12 years). The refractive errors of all the eyes were measured with and without cycloplegia using a hand ...
PURPOSE To assess the effects of systemic propranolol on refractive error in infants with periocular capillary hemangiomas. METHODS A single-center study of consecutive patients with capillary hemangiomas treated with systemic propranolol. Refractive data were analyzed using Long's matrix formalism and the methods of Harris and Kaye. RESULTS Seventeen patients were included. At 6 months pos...
There is a saying that when life hands you a lemon, you make lemonade out of it. I found that this has a parallel in molecular modeling: when your test of a putative diagnostic property fails to show discriminatory power, make an invariant out of it. The paper by Mittal, Jayaram, Shenoy and Bawa (1) is a brilliant example of this. Based on three independent observations, comparison of Cα distan...
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