Sir,
Natkunarajah et al claim that indirect ophthalmoscopy is superior to noncontact slit-lamp examination in the identification of retinal tears. They may be correct, but unfortunately this conclusion is not supported by their data. No statistical analysis of their figures was included.
McNemar's test shows no evidence of any difference in detection rates (P = 0.5) between the two groups.
There are now publication standards for reporting studies of diagnostic accuracy (STARD),1 which readers may find useful in planning work of this type.
References
Bossuyt PM, Reitsma JB, Bruns DE, Gatsonis CA, Glasziou PP, Irwig LM et al. Standards for Reporting of Diagnostic Accuracy. Towards complete and accurate reporting of studies of diagnostic accuracy: the STARD initiative. BMJ 2003; 326 (7379): 41–44.
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Aylward, G. Re Diagnostic effectiveness of noncontact slitlamp examination in the identification of retinal tears. Eye 19, 473 (2005). https://doi.org/10.1038/sj.eye.6701519
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DOI: https://doi.org/10.1038/sj.eye.6701519
