Pennsylvania, USA, Center for Preventive Ophthalmology and Biostatistics, Scheie Eye Institute, University of Pennsylvania(应桂双);325027 温州医科大学附属眼视光医院临床科研中心(应桂双、梁远波)
Analysis of Correlated Two Eyes Data for Ophthalmic Clinical Research
Guishuang Ying,Yuanbo Liang
Center for Preventive Ophthalmology and Biostatistics, Scheie Eye Institute, University of Pennsylvania,Pennsylvania, America;Center for Clinical Ophthalmic and Optometric Research, Wenzhou Medical University, Wenzhou 325027,China.
Objective: To describe the proper statistical approach in ophthalmic research for analyzing correlated data for contralateral eyes of the same subjects. Methods: For data from a paired design and a design for two eyes that are commonly used in ophthalmic research, we described the appropriate statistical approaches for analyzing the correlated data for both eyes of the same subjects. As an example, we compared the intraocular pressure between patients < 60 vs. ≥ 60 years of age, using the inappropriate and appropriate statistical analysis approaches. Results: The inappropriate analysis of data for one eye leaded only to a biased or inefficient estimate of the difference between two groups. The analysis of data for both eyes of the same subjects without accounting for inter-eye correlation had a smaller p-value (P=0.02) than the analysis that accounted for inter-eye correlation (P=0.098). Conclusions: Appropriate statistical analytical approaches should be used to account for the inter-eye correlation. The statistical analysis using data for only one eye or ignoring the inter-eye correlation can lead to an incorrect conclusion.
应桂双,梁远波. 眼科临床研究中双眼数据的处理[J]. 中华眼视光学与视觉科学杂志, 2017, 19(7): 390-393.
Guishuang Ying,Yuanbo Liang. Analysis of Correlated Two Eyes Data for Ophthalmic Clinical Research. Chinese Journal of Optometry Ophthalmology and Visual science, 2017, 19(7): 390-393. DOI: DOI:10.3760/cma.j.issn.1674-845X.2017.07.002
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