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Ziaf021

Zia Farooq

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Survival Analysis: Celiac disease dataset
This study investigates if patients with celiac disease are at a higher risk of future colorectal cancer (CRC) compared to controls. The start of CRC is defined as the day of the first ICD code starting by C18, C19, or C20. End of follow-up of the study is 2019-12-31. The design is a matched cohort study, where each celiac patient was matched to maximum 2 non-celiac persons on age and sex at start of follow-up. The data can be found in 3 files. celiac.txt contains 7 variables: - Id.number: The number identifying the celiac patient - Start.of.flwp: Start of follow-up. - Gender: 1= Male, 2= Female - Age: The person’s age - Birthday: The person’s birthday - Date.of.Death: The day the person died - Date.of.Migration: The day the person migrated. nonceliac.txt contains 4 variables: - Id.number: The number identifying the non-celiac person - Celiac.number: The number identifying the celiac patient the person is matched to - Date.of.Death: The day the person died - Date.of.Migration: The day the person migrated. ICD.txt contains 3 variables - Id.number: The number identifying the person - ICD.codes: The list of ICD codes assigned at a specific date. - Date.of.ICD.codes: The date the ICD codes were assigned Present all requested results in the table below. You can use any software you like. How would you interpret these results? Write them down in a scientific way below the table (max 10 lines). Also paste the syntax from your calculations at the bottom of this document.