Volume 44, Issue 8 pp. 1909-1917
ORIGINAL ARTICLE

Validated algorithms for identifying timing of second event of oropharyngeal squamous cell carcinoma using real-world data

Shahreen Khair MA

Shahreen Khair MA

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

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Joseph C. Dort MD, MSc

Joseph C. Dort MD, MSc

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

Department of Surgery, Cumming School of Medicine, University of Calgary, North Tower, Foothills Medical Centre, Calgary, Alberta, Canada

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May Lynn Quan MD, MSc

May Lynn Quan MD, MSc

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

Department of Surgery, Cumming School of Medicine, University of Calgary, North Tower, Foothills Medical Centre, Calgary, Alberta, Canada

Department of Oncology, Cumming School of Medicine, University of Calgary, Tom Baker, Cancer Centre, Calgary, Alberta, Canada

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Winson Y. Cheung MD, MPH

Winson Y. Cheung MD, MPH

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

Department of Surgery, Cumming School of Medicine, University of Calgary, North Tower, Foothills Medical Centre, Calgary, Alberta, Canada

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Khara M. Sauro PhD

Khara M. Sauro PhD

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

Department of Surgery, Cumming School of Medicine, University of Calgary, North Tower, Foothills Medical Centre, Calgary, Alberta, Canada

Department of Oncology, Cumming School of Medicine, University of Calgary, Tom Baker, Cancer Centre, Calgary, Alberta, Canada

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Steven C. Nakoneshny BSc

Steven C. Nakoneshny BSc

The Ohlson Research Initiative, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, Alberta, Canada

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Brittany Lynn Popowich BHSc

Brittany Lynn Popowich BHSc

Centre for Health Informatics, Cumming School of Medicine, University of Calgary, Teaching Research and Wellness (TRW), Calgary, Alberta, Canada

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Ping Liu PhD

Ping Liu PhD

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

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Guosong Wu PhD

Guosong Wu PhD

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

Centre for Health Informatics, Cumming School of Medicine, University of Calgary, Teaching Research and Wellness (TRW), Calgary, Alberta, Canada

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Yuan Xu MD PhD

Corresponding Author

Yuan Xu MD PhD

Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

Department of Surgery, Cumming School of Medicine, University of Calgary, North Tower, Foothills Medical Centre, Calgary, Alberta, Canada

Department of Oncology, Cumming School of Medicine, University of Calgary, Tom Baker, Cancer Centre, Calgary, Alberta, Canada

Centre for Health Informatics, Cumming School of Medicine, University of Calgary, Teaching Research and Wellness (TRW), Calgary, Alberta, Canada

Correspondence

Yuan Xu, Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, Alberta T2N4Z6, Canada.

Email: [email protected]

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First published: 02 June 2022

Abstract

Background

Understanding occurrence and timing of second events (recurrence and second primary cancer) is essential for cancer specific survival analysis. However, this information is not readily available in administrative data.

Methods

Alberta Cancer Registry, physician claims, and other administrative data were used. Timing of second event was estimated based on our developed algorithm. For validation, the difference, in days between the algorithm estimated and the chart-reviewed timing of second event. Further, the result of Cox-regression modeling cancer-free survival was compared to chart review data.

Results

Majority (74.3%) of the patients had a difference between the chart-reviewed and algorithm-estimated timing of second event falling within the 0–60 days window. Kaplan–Meier curves generated from the estimated data and chart review data were comparable with a 5-year second-event-free survival rate of 75.4% versus 72.5%.

Conclusion

The algorithm provided an estimated timing of second event similar to that of the chart review.

CONFLICT OF INTEREST

The authors declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of the research reported.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.