an increasing trendp < 0.001
Both groups show an increasing trend between 1999 and 2019 ( p < 0.001 for cohort, p < 0.001 for pain group, p = 0.89 for interaction, adjusted for age, sex, and Charlson comorbidity index).
Both groups show an increasing trend between 1999 and 2019 ( p < 0.001 for cohort, p < 0.001 for pain group, p = 0.89 for interaction, adjusted for age, sex, and Charlson comorbidity index).