Iacovino ML, Celant S, Tomassini L, Arenare L, Caglio A, Canciello A, Salerno F, Olimpieri PP, Di Segni S, Sferrazza A, Piccirillo MC, Beretta GD, Pinto C, Blasi L, Cinieri S, Cavanna L, Di Maio M, Russo P, and Perrone F
Background: Generalizability of registrative clinical trials to real-world clinical practice is influenced by comparability of patients in the two settings. We compared characteristics of cancer patients in registrative trials with real-world clinical practice in Italy., Methods: Data on age, sex and performance status (PS) were derived from web-based monitoring registries developed by Italian Medicines Agency (AIFA) and corresponding registrative trials reported in the European Public Assessment Reports (EPAR) of European Medicines Agency (EMA). Weighted means were calculated in registries and trials and differences were described. Multivariate analysis was performed using Principal Component Analysis and Cluster Analysis., Findings: From January, 2013 to April, 2023, 419,461 unique pairs of patients and therapeutic indications were recorded in 129 AIFA registries. Within 140 related trials, 87,452 patients had been enrolled. Median age and rate of elderly (≥65 years old) patients were higher in monitoring registries than in clinical trials [mean difference of median age 5.3 years, p < 0.001; mean difference of elderly rate 17.17% (95% CI 1.06, 1.48)]. Overall, rate of female patients was not different between registries and trials [mean difference -0.55% (95% CI -1.06, -0.05)]. Mean rate of patients with deteriorated PS was low both in trials (3.1%) and in registries (4.3%) with a mean difference of 1.27% (95% CI 1.06, 1.48). Two clusters were identified with multivariate analysis: one including more registries (higher median age and elderly rate, lower female rate, higher rate of deteriorated patients), the other more trials (lower median age and elderly rate, higher female rate, lower rate of deteriorated patients)., Interpretation: This study supports that cancer patients enrolled in trials do only partially represent those who have been treated in Italy in clinical practice. Inclusiveness of registrative trials should be increased to ensure generalizability of results to real-world population., Funding: Partially supported by Italian Ministry of Health., Competing Interests: SC declares: support for attending meetings and/or travel from Novartis and Roche; payment for participation on advisory board from EliLilly and AstraZeneca; leadership in scientific society: President of AIOM 2021–2023. MCP declares: institutional grants or contracts from Bayer, AstraZeneca, Roche; payment or honoraria for lectures, presentations, speakers bureaus, manuscript writing or educational events from Astellas, Pfizer, Ipsen, AstraZeneca; support for attending meetings and/or travel from Menarini. MDM declares: institutional grants or contracts from Tesaro/GSK, Beigene, Exelixis, MSD, Pfizer and Roche; fees for consulting or participation in advisory board from AstraZeneca, Boehringer Ingelheim, Janssen, Merck Sharp & Dohme, Novartis, Pfizer, Roche, GlaxoSmithKline, Amgen, Merck, Takeda. FP declares: institutional grants or contracts from Roche, Bayer, AstraZeneca, Pfizer, Incyte, Tesaro/GSK, Merck; consulting fees from Bayer, Pierre Fabre, Astra Zeneca, Incyte, Ipsen, Clovis, Astellas, Sanofi, Roche, Pfizer; leadership in scientific society: President of AIOM 2023–2025. All the other Authors declare no potential conflict of interest., (© 2024 The Author(s).)