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. 2018 Jan 18;10:53–65. doi: 10.2147/CEOR.S148405

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© 2018 Hadjiat et al. This work is published and licensed by Dove Medical Press Limited

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Mean activity impairment (WPAI), according to pain, sex, and CCI category.

Notes: Higher CCI categories had small sample sizes. *p<0.05.

Abbreviations: CCI, Charlson comorbidity index; WPAI, Work Productivity and Activity Impairment.