Correction: Power of treatment success definitions when the Canine Brief Pain Inventory is used to evaluate carprofen treatment for the control of pain and inflammation in dogs with osteoarthritis

In the report “Power of treatment success definitions when the Canine Brief Pain Inventory is used to evaluate carprofen treatment for the control of pain and inflammation in dogs with osteoarthritis” (Am J Vet Res 2013;74:1467–1473), the abbreviations for pain interference score (PIS) and pain severity score (PSS) were inadvertently switched in 2 places. In the Conclusions and Clinical Relevance section of the abstract, the following sentence is incorrect:

The CBPI had robust statistical power to evaluate the treatment effect of carprofen in dogs with osteoarthritis when protocol success criteria were predefined as a reduction ≥ 1 in PIS and ≥ 2 in PSS.

The sentence should have read as follows:

The CBPI had robust statistical power to evaluate the treatment effect of carprofen in dogs with osteoarthritis when protocol success criteria were predefined as a reduction ≥ 1 in PSS and ≥ 2 in PIS.

In the 8th paragraph of the Discussion section on page 1472, the following sentence contained a similar error:

In addition, defining success with more stringent criteria (decrease ≥ 1 in PIS and ≥ 2 in PSS) resulted in treatment being classified as a success in fewer dogs overall, but a substantially smaller P value (P = 0.013) was found.

The sentence should have read:

In addition, defining success with more stringent criteria (decrease ≥ 1 in PSS and ≥ 2 in PIS) resulted in treatment being classified as a success in fewer dogs overall, but a substantially smaller P value (P = 0.013) was found.

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