Patient-reported quality of outpatient healthcare in patients with chronic back or arthrosis pain with long-term opioid therapy in Germany.

BMC Prim Care · 2025 · PMC12181890 · PMID 40544254

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a clear trendno p-value reported

The lack of a clear trend might be attributed to many possible causes: results of the GCPS show strong ceiling effects as across the 5 levels of the GCPS, 85% are distributed to the two highest classifications.

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