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Performance of the ICD-10 and the ICD-11 in the line coding of chronic pain conditions. Correctness (A), difficulty (B), and ambiguity (C) of coding diagnostic terms of chronic primary pain conditions using the ICD-10 (filled bars) and the ICD-11 (open bars). Frequencies are shown in percent of all lines. Statistical testing with the McNemar test. ***p < 0.001.
