ArticleFrontiers in pharmacology2026
Spatial inequalities and contextual correlates of methylphenidate dispensing in Jiangsu Province, China.
Article in Frontiers in pharmacology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Understanding geographic inequalities in psychotropic medication dispensing is important for improving health equity and informing place-based pharmaceutical management. This study characterized the spatiotemporal distribution of methylphenidate hydrochloride extended-release tablet dispensing in Jiangsu Province, China, from 2019 to 2023 and examined its socioeconomic and education-related correlates. Methods: Annual county-level dispensed tablet volumes were analyzed using Getis-Ord Gi* hot-spot analysis, standard deviational ellipses, and weighted-centroid analysis. Prefecture-level contextual correlates were examined using annual Lasso models interpreted with SHAP. Results: The proportion of county-level units with zero recorded dispensing decreased from approximately 52%-36%, while the proportion with annual volumes exceeding 20,000 tablets increased from 7% to 20%. Southern Jiangsu consistently exhibited higher dispensing volumes than Northern Jiangsu, with Central Jiangsu generally occupying an intermediate position. Getis-Ord Gi* identified localized high-value concentrations mainly in Southern and parts of Central Jiangsu. The standard deviational ellipse area increased by 23.1%, while the weighted centroid remained in south-central Jiangsu. Within the annual Lasso models, predictive importance was allocated mainly to economic-demographic indicators in 2019-2020 and more strongly to education-related indicators in 2021-2023. Discussion: The findings support geographically differentiated monitoring of medication access, dispensing patterns, and prescribing quality.
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