Barbic D, Chenkin J, Cho DD, et al. In patients presenting to the emergency department with skin and soft tissue infections what is the diagnostic accuracy of point-of-care ultrasonography for the diagnosis of abscess compared to the current standard of care? A systematic review and meta-analysis. BMJ Open 2017;7:e013688. doi: 10.1136/bmjopen-2016-013688

The authors’ original interpretation of the data presented in the article by Marin et al (2013) was incorrect.^{1 2} The authors inadvertently included only patients with clinical exam evidence of abscess, instead of all patients that had point-of-care ultrasound (POCUS). As a result, the revised numbers for the article by Marin et al (2013) would be True Positive 193, False Positive 37, False Negative 27, True Negative 95.² The subsequent diagnostic accuracy of POCUS in this study would be altered to a sensitivity of 88% and specificity of 72%. Incorporating these results into the final meta-analysis, the revised point estimates for the diagnostic accuracy of POCUS would be sensitivity 95.5% (95% CI 88.9-98.3) and specificity 80.3% (95% CI 56.4-92.7). The original findings of the meta-analysis were sensitivity 96.2% (95% CI 91.1% to 98.4%), and specificity 82.9% (95% CI 60.4% to 93.9%).¹ The authors thank Marin et al for bringing this discrepancy to their attention.