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Contact information

Email
sofia.massa@ndorms.ox.ac.uk

Website
Google Scholar Profile

ORCID
https://orcid.org/0000-0003-3205-6706

Research groups

Colleges

St Catherine's College

Sofia Massa

PhD in Statistical Sciences

OCTRU Lead Statistician

Since February 2023 I am a Lead Statistician in the Oxford Clinical Trial Research Unit within the Centre for Statistics in Medicine. I am a member of the senior statistical team and I lead the experimental design and statistical analyses of randomised controlled trials and health research observational studies.

My research interests include advancing statistical methods for experimental design, causal methods for observational studies and the statistical combination of evidence.

I am currently supervising 1 DPhil student and I have supervised 4 DPhil students (in Population Health) to completion and I regularly supervise MSc students.

Previous positions

October 2016-January 2023: Senior Statistician and Module Lead in Statistics (50% Research and 50% Teaching -Nuffield Department of Population Health within the Big Data Institute). I co-lead the statistical and methodological aspects of research studies involving large population studies (UK Biobank, China Kadoorie Biobank, Cuba Prospective Study, Life Line Screening, TILDA among others).

September 2010-September 2016: Departmental Lecturer in Statistics and MSc in Applied Statistics co-ordinator (50% Research and 50% Teaching - Department of Statistics).

Recent publications

Medium-term recovery of patients with complex lower limb fractures : follow-up study of fracture types in the Wound Healing in Surgery for Trauma (WHIST) trial.

Goh EL. et al, (2026), Bone Joint J, 108-B, 681 - 687

Agreement and utility between registry and trial mortality data - a data utility comparison in the BOSS trial.

Zimmermann A. et al, (2026), Trials, 27

A0644 PRESIDENT: PRostatEctomy Surgery In Disseminated low-volume metastatic hormone sensitive prostate cancer with Endpoint assessment using Nuclear imaging Technology using PSMA (Prostate-Specific Membrane Antigen) PET/CT (Positron Emission Tomography/Computed Tomography) imaging: A definitive randomised controlled trial

Sooriakumaran P. et al, (2026), European Urology, 89, S1 - S1

What is the association between time to surgery and patient outcome after hip fracture? : a systematic review.

Mazarello Paes V. et al, (2026), Bone Joint J, 108-B, 30 - 38

Clinical Outcomes of Ultra-Hypofractionated MR-Guided Adaptive SABR (SMART) for Localized Pancreatic Cancer: EMERALD Phase 1 Trial (ISRCTN10557832)

Moreno-Olmedo E. et al, (2026)

Real-World Treat-to-Target Strategy in Psoriatic Arthritis: 48-week Results from the MONITOR-PsA Cohort

Letarouilly J-G. et al, (2026)

PRESIDENT: PRostatEctomy Surgery In Disseminated low-volume metastatic hormone sensitive prostate cancer with Endpoint assessment using Nuclear imaging Technology using PSMA (Prostate-Specific Membrane Antigen) PET/CT (Positron Emission Tomography/Computed Tomography) imaging: A definitive randomised controlled trial

Sooriakumaran P. et al, (2026), EUROPEAN UROLOGY, 89

Lessons learned from the BOSS trial.

Old O. et al, (2025), Lancet Gastroenterol Hepatol, 10, 971 - 972

Cost-Effectiveness of Regular Surveillance Versus Endoscopy at Need for Patients With Barrett's Esophagus: Economic Evaluation Alongside the Barrett's Oesophagus Surveillance Study (BOSS) Randomized Controlled Trial.

Deidda M. et al, (2025), Gastroenterology, 169, 1244 - 1252.e7

Barrett's Oesophagus Surveillance Versus Endoscopy at Need Study (BOSS): A Randomized Controlled Trial.

Old O. et al, (2025), Gastroenterology, 169, 1233 - 1243.e8

A review of the statistical analysis of randomised controlled trials conducted within OCTRU.

Ooms A. et al, (2025), Trials, 26

Su1221: COST-EFFECTIVENESS OF REGULAR SURVEILLANCE VERSUS ENDOSCOPY AT NEED FOR PATIENTS WITH BARRETT’S ESOPHAGUS: ECONOMIC EVALUATION ALONGSIDE THE BOSS RANDOMIZED CONTROLLED TRIAL

Old O. et al, (2025), Gastroenterology, 169

622: BARRETT’S OESOPHAGUS SURVEILLANCE VERSUS ENDOSCOPY AT NEED STUDY (BOSS): A RANDOMIZED CONTROLLED TRIAL

Old O. et al, (2025), Gastroenterology, 169, S - 149

Clinical outcomes from EMERALD trial: A phase I evaluating ultra-hypofractionated MR-Guided Adaptive SABR (SMART) for localized pancreatic cancer

Mukherjee S. et al, (2025), RADIOTHERAPY AND ONCOLOGY, 206, S1783 - S1785

Barrett's Oesophagus Surveillance Versus Endoscopy at Need Study (BOSS): A Randomized Controlled Trial

Old O. et al, (2025), GASTROENTEROLOGY, 169

COST-EFFECTIVENESS OF REGULAR SURVEILLANCE VERSUS ENDOSCOPY AT NEED FOR PATIENTS WITH BARRETT'S ESOPHAGUS: ECONOMIC EVALUATION ALONGSIDE THE BOSS RANDOMIZED CONTROLLED TRIAL

Old O. et al, (2025), GASTROENTEROLOGY, 169, S709 - S710

Five-year outcomes for patients sustaining severe fractures of the lower limb from the Wound Healing in Surgery for Trauma (WHIST) trial.

Costa ML. et al, (2024), Bone Joint J, 106-B, 858 - 864

The protocol of a clinical effectiveness trial comparing standard step-up care, early combination DMARD therapy and early use of TNF inhibitors for the treatment of moderate to severe psoriatic arthritis: the 3-arm parallel group SPEED randomized controlled trial

Watson M. et al, (2024), Therapeutic Advances in Musculoskeletal Disease, 16

Anti-TNF (adalimumab) injection for the treatment of pain-predominant early-stage frozen shoulder: the Anti-Freaze-Feasibility randomised controlled trial.

Hopewell S. et al, (2024), BMJ Open, 14

The protocol of a clinical effectiveness trial comparing standard step-up care, early combination DMARD therapy and early use of TNF inhibitors for the treatment of moderate to severe psoriatic arthritis: the 3-arm parallel group SPEED randomized controlled trial.

Watson M. et al, (2024), Ther Adv Musculoskelet Dis, 16

More publications