Correlation of Single Assessment Numeric Evaluation (SANE) with other Patient Reported Outcome Measures (PROMs)

Background: The Single Assessment Numeric Evaluation (SANE) is a simple, one-question patient-reported outcomemeasure (PROM). We systematically reviewed correlations between SANE and more extensive PROMs.Methods: We identified studies with correlation coefficients between SANE and other shoulder, knee, and anklespecificPROMs. We calculated mean, median and range across studies and time points of data collection.Results: Eleven studies provided 14 correlations, six shoulder-specific PROMs in four studies, six knee-specific PROMsin six studies and two ankle specific PROMs in one study. The mean correlation comparing SANE and knee-specificPROMs was 0.60 (SD 0.24), median 0.66, and range 0.12 to 0.88. Among studies comparing SANE and shoulderspecificPROMs mean correlation was 0.59 (SD 0.20), median 0.62 and range 0.20 to 0.89. The mean correlationbetween SANE and ankle-specific PROMs was 0.69 (SD 0.17), median 0.69 and range 0.75 to 0.81.Conclusion: There seems to be moderate correlation amongst PROMs, even those that are a single question. Futureresearch might address whether patient reported outcome measure a common underlying construct even when theyconsist of a single question.Level of evidence: V