Abstract
The objective of this study was to quantify the temporal patterns and cross-country inequities in the quality of care for gastrointestinal (GI) cancers from 1990 to 2021. Using data from the 2021 Global Burden of Disease Study, which employs advanced methodologies such as Bayesian meta-regression and the Cause of Death Ensemble model to produce robust health estimates, we conducted a secondary analysis of esophageal cancer, stomach cancer, and colorectal cancer at global, regional, and national levels. Principal component analysis was applied to evaluate 4 key ratios: mortality-to-incidence, disability-adjusted life years-to-prevalence, prevalence-to-incidence, and years of life lost-to-years lived with disability. The most influential component derived from this analysis was defined as the quality of care index (QCI), which was constructed to assess the quality of care for GI cancers. Scores were then calculated and scaled on a 0 to 100 range, with higher scores reflecting a better status. Temporal trends in QCI were evaluated using estimated annual percentage change, and associations with the sociodemographic index (SDI) were explored via Spearman correlation analysis. Cross-country inequalities in QCI were quantified using the slope index of inequality for absolute inequalities and the concentration index for relative inequalities. Global age-standardized QCI improved from 1990 to 2021: esophageal cancer from 23.86 to 41.13, stomach cancer from 39.58 to 57.57, colorectal cancer from 65.67 to 80.68. Spearman analysis revealed a positive correlation between higher SDI values and improved age-standardized QCI for all GI cancers. However, absolute and relative inequalities persist. At the SDI regional and GBD super regional levels, varied change patterns were observed, with most regions experiencing worsening inequalities. Notably, females exhibited more pronounced inequities in QCI than males. Our study reveals significant improvements in GI cancer care quality, yet substantial inequities persist. Equitable resource allocation and global collaboration are crucial to mitigate these inequities.