The Charlson comorbidity score was slightly higher in the moderate-to-severe pain group (mean = 1.2, SD = 1.4) compared to the mild pain group (mean = 0.9, SD = 1.3), the difference did not reach statistical significance (p = 0.06).
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Characteristics of moderate-to-severe chronic pain and its association with daily functional impairment among older outpatients in Vietnam.
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