Background: Developing and using the software version of existing validated paper version of patient-related outcome can go a long way in saving cost, time and effort. However, the equivalence of paper version and software versions cannot be assumed. The aim of the study is to test the equivalence between paper version and software version of Roland Morris Disability Questionnaire and its acceptability among patients.
Methods: This is a within-subject cross over equivalence study. Fifty-five patients with back pain were asked to complete the paper and software version of RMDQ in random order. Patients were included from the Neuro Spinal surgery outpatient department of Lilavati Hospital and Research Center.
Results: Statistical analysis of 52 patients who completed the study showed high agreement between the paper and software version of the questionnaire (intraclass correlation coefficient 0.994, 95% confidence interval (0.989-0.996)). High sensitivity and specificity of 84 and 88% of the software version was noted. About 69.2% patients preferred software version over paper version.
Conclusion: Our study shows that software version is comparable to the paper version. It may prove to be a useful tool for epidemiological studies and patient follow-up over longer period.
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