Income-Group Representation in Neurosurgical Clinical Trials Registered on ClinicalTrials.gov, 2010–2024: data and code

Data and analysis code accompanying the study "Income-Group Representation in Neurosurgical Clinical Trials Registered on ClinicalTrials.gov, 2010–2024: A Registry-Based Cross-Sectional Analysis" (Atwa MA). The deposit contains: the analytic dataset of 9,483 interventional neurosurgical trials with year-matched World Bank income classifications (data.zip); Python code reproducing the data pull, income labelling, statistical models, sensitivity and leave-one-country-out analyses, and all figures (code.zip); the main and supplementary figures plus the study-selection flow diagram (figures.zip); and model-output tables (outputs.zip). See README.md for a full data dictionary and reproduction instructions. Data derive from the public ClinicalTrials.gov API (v2) and the World Bank historical income classification (OGHIST). Code is released under the MIT License; data and documentation under CC BY 4.0.