Muziman Syah Mustafa, H. A. Mutalib, Sharanjeet Kaur Ms, Khairidzan Mk
{"title":"不同角膜测量仪测量角膜屈光力的会话间和检查者间可靠性的比较研究","authors":"Muziman Syah Mustafa, H. A. Mutalib, Sharanjeet Kaur Ms, Khairidzan Mk","doi":"10.31436/IMJM.V15I1.409","DOIUrl":null,"url":null,"abstract":"Introduction : The purpose of this study was to evaluate inter-session repeatability, inter-examiner reproducibility and inter-device agreement of corneal power measurements from manual keratometer, autokeratometer, topographer, Pentacam high resolution and IOLMaster. Methods : Two sets of mean corneal power measurements ( n =40) were compared for inter-session repeatability and inter-examiner reproducibility in each instrument. Repeatability and reproducibility were evaluated by within-subject standard deviation (Sw), coefficient of variation (COV) and intraclass correlation coefficient (ICC). A one-way repeated measures analysis of variance was conducted to compare differences in the corneal power between each instrument pair. The Bland and Altman analysis and Pearson’s correlation were employed to assess agreement and determine strength of relationship between measurements. Results : There were no significant differences in mean corneal power measurements between 2 different visits ( p > 0.05). The Sw and COV values between 2 visits were lower than 0.09 D and 0.20 % respectively. The ICCs were stronger than 0.99 in all instruments. For reproducibility of each instrument, differences of the measurements between 2 different examiners were also insignificant ( p > 0.05). The Sw and COV values between 2 examiners were lower than 0.11 D and 0.23 % respectively. The ICCs were 0.99 and above in all instruments. The 95% limit of agreement between instruments ranged from -0.29 to 1.13 D and the r- values were stronger than 0.84. Conclusion : The corneal power measurements using these 5 instruments were repeatable and reproducible. These instruments can also be used interchangeably, however the topographer should be used with caution.","PeriodicalId":53575,"journal":{"name":"International Medical Journal Malaysia","volume":null,"pages":null},"PeriodicalIF":0.3000,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"A Comparative Study on the Inter-Session and Inter-Examiner Reliability of Corneal Power Measurement Using Various Keratometry Instruments\",\"authors\":\"Muziman Syah Mustafa, H. A. Mutalib, Sharanjeet Kaur Ms, Khairidzan Mk\",\"doi\":\"10.31436/IMJM.V15I1.409\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Introduction : The purpose of this study was to evaluate inter-session repeatability, inter-examiner reproducibility and inter-device agreement of corneal power measurements from manual keratometer, autokeratometer, topographer, Pentacam high resolution and IOLMaster. Methods : Two sets of mean corneal power measurements ( n =40) were compared for inter-session repeatability and inter-examiner reproducibility in each instrument. Repeatability and reproducibility were evaluated by within-subject standard deviation (Sw), coefficient of variation (COV) and intraclass correlation coefficient (ICC). A one-way repeated measures analysis of variance was conducted to compare differences in the corneal power between each instrument pair. The Bland and Altman analysis and Pearson’s correlation were employed to assess agreement and determine strength of relationship between measurements. Results : There were no significant differences in mean corneal power measurements between 2 different visits ( p > 0.05). The Sw and COV values between 2 visits were lower than 0.09 D and 0.20 % respectively. The ICCs were stronger than 0.99 in all instruments. For reproducibility of each instrument, differences of the measurements between 2 different examiners were also insignificant ( p > 0.05). The Sw and COV values between 2 examiners were lower than 0.11 D and 0.23 % respectively. The ICCs were 0.99 and above in all instruments. The 95% limit of agreement between instruments ranged from -0.29 to 1.13 D and the r- values were stronger than 0.84. Conclusion : The corneal power measurements using these 5 instruments were repeatable and reproducible. These instruments can also be used interchangeably, however the topographer should be used with caution.\",\"PeriodicalId\":53575,\"journal\":{\"name\":\"International Medical Journal Malaysia\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.3000,\"publicationDate\":\"2020-11-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Medical Journal Malaysia\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.31436/IMJM.V15I1.409\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MEDICINE, GENERAL & INTERNAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Medical Journal Malaysia","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.31436/IMJM.V15I1.409","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MEDICINE, GENERAL & INTERNAL","Score":null,"Total":0}
A Comparative Study on the Inter-Session and Inter-Examiner Reliability of Corneal Power Measurement Using Various Keratometry Instruments
Introduction : The purpose of this study was to evaluate inter-session repeatability, inter-examiner reproducibility and inter-device agreement of corneal power measurements from manual keratometer, autokeratometer, topographer, Pentacam high resolution and IOLMaster. Methods : Two sets of mean corneal power measurements ( n =40) were compared for inter-session repeatability and inter-examiner reproducibility in each instrument. Repeatability and reproducibility were evaluated by within-subject standard deviation (Sw), coefficient of variation (COV) and intraclass correlation coefficient (ICC). A one-way repeated measures analysis of variance was conducted to compare differences in the corneal power between each instrument pair. The Bland and Altman analysis and Pearson’s correlation were employed to assess agreement and determine strength of relationship between measurements. Results : There were no significant differences in mean corneal power measurements between 2 different visits ( p > 0.05). The Sw and COV values between 2 visits were lower than 0.09 D and 0.20 % respectively. The ICCs were stronger than 0.99 in all instruments. For reproducibility of each instrument, differences of the measurements between 2 different examiners were also insignificant ( p > 0.05). The Sw and COV values between 2 examiners were lower than 0.11 D and 0.23 % respectively. The ICCs were 0.99 and above in all instruments. The 95% limit of agreement between instruments ranged from -0.29 to 1.13 D and the r- values were stronger than 0.84. Conclusion : The corneal power measurements using these 5 instruments were repeatable and reproducible. These instruments can also be used interchangeably, however the topographer should be used with caution.
期刊介绍:
International Medical Journal Malaysia (IMJM) is the official journal of the Kulliyyah (Faculty) of Medicine, International Islamic University Malaysia. It serves primarily as a forum for education and intellectual discourse for health professionals namely in clinical medicine but covers diverse issues relating to medical ethics, professionalism as well as medical developments and research in basic medical sciences. It also serves the unique purpose of highlighting issues and research pertaining to the Muslim world. Contributions to the IMJM reflect its international and multidisciplinary readership and include current thinking across a range of specialties, ethnicities and societies.