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 outcome measure (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 ankle-specific PROMs. 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 PROMs in six studies and two ankle specific PROMs in one study. The mean correlation comparing SANE and knee-specific PROMs was 0.60 (SD 0.24), median 0.66, and range 0.12 to 0.88. Among studies comparing SANE and shoulder-specific PROMs mean correlation was 0.59 (SD 0.20), median 0.62 and range 0.20 to 0.89. The mean correlation between 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. Future research might address whether patient reported outcome measure a common underlying construct even when they consist of a single question.