Multicentre validation of CT grey-level co-occurrence matrix features for overall survival in primary oesophageal adenocarcinoma

Robert O’Shea, Samuel J. Withey, Kasia Owczarczyk, Christopher Rookyard, James Gossage, Edmund Godfrey, Craig Jobling, Simon L. Parsons, Richard J.E. Skipworth, Vicky Goh*, Tom D.L. Crosby, Freddie Bartlett, Russell D. Petty, Helen Coleman, Damian McManus, Richard Turkington, Anna Grabowska, Krishna Moorthy, Christopher J. Peters, George B. HannaSharmila Sothi, Michael Scott, Rehan Haidry, Laurence Lovat, John Saunders, Philip Kaye, Irshad Soomro, Loveena Sreedharan, Bhaskar Kumar, Ed Cheong, David Chan, Grant Sanders, Francesca D. Ciccarelli, Ula Mahadeva, Fuju Chang, Andrew Davies, Jesper Lagergren, Ben L. Grace, Timothy J. Underwood, Gianmarco Contino, Sonia Puig, Philippe Taniere, Andrew Beggs, Olga Tucker, J. Robert O’Neill, Vicki Save, Izhar Bagwan, Shaun R. Preston, Andrew Sharrocks, Yeng Ang, on behalf of the OCCAMS Consortium

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Background: Personalising management of primary oesophageal adenocarcinoma requires better risk stratification. Lack of independent validation of proposed imaging biomarkers has hampered clinical translation. We aimed to prospectively validate previously identified prognostic grey-level co-occurrence matrix (GLCM) CT features for 3-year overall survival. 

Methods: Following ethical approval, clinical and contrast-enhanced CT data were acquired from participants from five institutions. Data from three institutions were used for training and two for testing. Survival classifiers were modelled on prespecified variables (‘Clinical’ model: age, clinical T-stage, clinical N-stage; ‘ClinVol’ model: clinical features + CT tumour volume; ‘ClinRad’ model: ClinVol features + GLCM_Correlation and GLCM_Contrast). To reflect current clinical practice, baseline stage was also modelled as a univariate predictor (‘Stage’). Discrimination was assessed by area under the receiver operating curve (AUC) analysis; calibration by Brier scores; and clinical relevance by thresholding risk scores to achieve 90% sensitivity for 3-year mortality. 

Results: A total of 162 participants were included (144 male; median 67 years [IQR 59, 72]; training, 95 participants; testing, 67 participants). Median survival was 998 days [IQR 486, 1594]. The ClinRad model yielded the greatest test discrimination (AUC, 0.68 [95% CI 0.54, 0.81]) that outperformed Stage (ΔAUC, 0.12 [95% CI 0.01, 0.23]; p =.04). The Clinical and ClinVol models yielded comparable test discrimination (AUC, 0.66 [95% CI 0.51, 0.80] vs. 0.65 [95% CI 0.50, 0.79]; p >.05). Test sensitivity of 90% was achieved by ClinRad and Stage models only. 

Conclusions: Compared to Stage, multivariable models of prespecified clinical and radiomic variables yielded improved prediction of 3-year overall survival. Clinical relevance statement: Previously identified radiomic features are prognostic but may not substantially improve risk stratification on their own. 

Key Points: • Better risk stratification is needed in primary oesophageal cancer to personalise management. • Previously identified CT features—GLCM_Correlation and GLCM_Contrast—contain incremental prognostic information to age and clinical stage. • Compared to staging, multivariable clinicoradiomic models improve discrimination of 3-year overall survival.

Original languageEnglish
Pages (from-to)6919-6928
Number of pages10
JournalEuropean Radiology
Volume34
Issue number10
Early online date25 Mar 2024
DOIs
Publication statusPublished - Oct 2024

Keywords

  • Adenocarcinoma
  • Oesophageal neoplasms
  • Precision medicine
  • Prognosis
  • Radiomics

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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