# Cross-National Pain And Functional Impairment In Older Adults With CVD: Insights From India, China, And Mexico

## TL;DR

Chronic pain in older adults with heart disease is strongly linked to functional disability in India, China, and Mexico, suggesting the need for better pain management in cardiovascular care.

## Contribution

This study provides cross-cultural evidence of the strong association between chronic pain and disability in older adults with CVD across three middle-income countries.

## Key findings

- Chronic pain was significantly associated with ADL disability in all three countries, with odds ratios ranging from 1.86 to 2.32.
- Longitudinal analyses showed that baseline pain predicted new-onset ADL disability in China and Mexico over three years.
- Pain severity showed a dose-response relationship with ADL and IADL limitations across all countries.

## Abstract

Chronic pain in older adults with cardiovascular disease (CVD) may exacerbate functional disability, yet cross-cultural evidence remains limited. This study examines pain-disability associations across India, China, and Mexico, providing a comparative perspective on aging and disability. We analyzed nationally representative data from three cohorts: the Longitudinal Aging Study in India (LASI, n = 11,247), China Health and Retirement Longitudinal Study (CHARLS, n = 3,733), and Mexican Health and Aging Study (MHAS, n = 5,108). Participants aged ≥60 with self-reported CVD were included. Chronic pain was assessed via self-report, and functional disability was measured using activities of daily living (ADL), instrumental ADL (IADL), and mobility scales. Cross-sectional multivariable logistic regression models examined associations, while longitudinal analyses in China and Mexico assessed 3-year incident disability risks. Pain prevalence was 43.7% in India, 36.2% in China, and 43.6% in Mexico. Adjusted models revealed significant associations between pain and ADL disability across all countries: India (OR = 1.86, 95% CI:1.70–2.04), China (OR = 2.22, 1.86–2.63), Mexico (OR = 2.32, 2.00–2.70). Pain severity showed dose-response relationships with ADL/IADL limitations. Longitudinally, baseline pain predicted higher risks of new-onset ADL disability in China (OR = 2.27, 1.71–3.01) and Mexico (OR = 1.97, 1.57–2.47), with consistent patterns for IADL disability. Chronic pain is a strong, independent predictor of functional disability in older CVD patients across diverse middle-income countries. These findings highlight the necessity of integrating pain management into cardiovascular care to promote functional independence in aging populations. Future research should explore culturally tailored interventions to mitigate the impact of pain on disability in diverse healthcare systems.