S1355
Interdisciplinary - Global health
ESTRO 2026
due to inconsistent or incomplete data collection, limited interoperability, and workforce or infrastructure gaps. An APAC-specific minimum dataset (MDS) is necessary to reflect regional resource variation and clinical practice differences, not adequately captured by frameworks developed in high-income contexts. This study, conducted under the IAEA Regional Cooperative Agreement Technical Cooperation Project RAS6108, aimed to establish a consensus-based MDS for radiotherapy across APAC, relevant to both high and LMIC countries. Material/Methods: A multinational modified Delphi process ran from May-July 2025, involving radiation oncologists, medical physicists, radiation therapists, and health information specialists from IAEA APAC member states. Candidate data elements (n=76) were derived from international standards, regional surveys, clinical guidelines, and expert recommendations, grouped into patient, diagnosis, technical, and administrative domains. Two electronic survey rounds, and one 60-minute in- person workshop were conducted. Participants rated each element on a 4-point Likert scale for importance and feasibility, with consensus defined a priori as ≥ 75% agreement for “must include.” Breast, cervical, and palliative bone metastases were presented as initial use cases for the MDS given their population incidence, and relevance to general and site-specific data elements. Results: There were 20, 15, and 39 respondents across the three rounds respectively, representing 17 APAC countries. Consensus following the survey phase identified 33 elements for inclusion. Workshop discussion refined these to 16 priority-one and 9 priority-two variables. Highest consensus was observed for variables fundamental to treatment delivery (including primary diagnosis site, body site treated, total dose, fractionation), while manually entered or institution-specific fields were less favoured. Participants reported a mean of 28.5 variables (range 0–200) as feasible for routine collection, consistent with the final MDS list (Table 1, 2).
Conclusion: This is the first region-wide consensus on OIS data collection in APAC. The MDS provides a scalable foundation for harmonised data capture. Implementing standardised data practices will enhance interoperability, data quality, and visibility of radiotherapy activity within cancer information ecosystems. Future phases will operationalise the dataset and evaluate feasibility and compliance. References: 1. Bray, F., Laversanne, M., Sung, H., Ferlay, J., Siegel, R.L., Soerjomataram, I. and Jemal, A., 2024. Global cancer statistics 2022: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA: a cancer journal for clinicians, 74(3), pp.229-263. Keywords: oncology information systems, data harmonisation
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