Table 2 Variables of interest for cases and controls
From: An ongoing case–control study to evaluate the NHS Bowel Cancer Screening Programme
Patient characteristics | Primary CRA & CRC pathology variables2 | Screening variables3 |
|---|---|---|
Patient unique ID | Tumour unique ID | Screening Health Authority cipher (NHAIS) |
NHS number | Tumour status | Screening office code |
Sex | Tumour description | Screening office reference |
Case or control | ICD-10 code | Year of first invitation to bowel cancer screening |
• C18 - Colon | ||
• C19 - Rectosigmoid junction | ||
• C20 - Rectum | ||
Date of birth | Dates of diagnoses (all CRAs & CRCs) | For bowel/cervical/breast screening |
Patient status (Alive or dead at end of study period)1 | Tumour detection mode (all CRAs & CRCs) | Episode number |
Date of death (where applicable) | Anatomical subsite (all CRAs & CRCs) | Episode type |
Age at death (where applicable) | CRC Dukes' stage (& any subsequent restaging) | Episode date |
Date of index tumour diagnosis | CRA villousness | Screen date |
Age at index tumour diagnosis | Tumour size (all CRAs & CRCs) | End code |
Died of primary CRC (where applicable) | Treatment/procedure at diagnosis (all CRAs & CRCs) | Flag: NHS or Screening Programme registration by age 60 |
Cancer registry | Any further treatment/procedure (all CRAs & CRCs) | |
Geographical area (as available in NCDR) | Optional: Dates of treatment (all CRAs & CRCs) | |
IMD quintile (or postcode) | ||
Ethnicity |