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. 2019 May 16;12:1537–1551. doi: 10.2147/JPR.S190162

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© 2019 Freo et al.

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Means (± SD) of painDetect questionnaire score (PDQ) at pretreatment (solid columns) and after 3-month (densely hatched columns) and 6-month (lightly hatched columns) treatment with tapentadol for chronic musculoskeletal pain, across different age groups. **Different from baseline (P<0.01, 6-month PDQ vs pretreatment PDQ, for all age group; 1-way ANOVA and t-test).