| Hospital Episode Statistics (HES) | 'Exeter' Cervical Screening data | Local Hospital Histopathology data |
---|---|---|---|
Identifiers for linkage | NHS Number, date of birth, postcode of home address. | NHS Number, date of birth, postcode of home address. | NHS Number. |
Data items | Ethnicity, dates of hysterectomy operation, admission and discharge, surgical operation code(s) OPCS, diagnosis code(s) SNOMED morphology, hospital, consultant, GP and PCT of residence. | Dates of all smear tests, results of those smear tests and recommended follow up, details of smear taker, registered GP, current cervical screening status and date of death (where applicable). | Details of histology at hysterectomy, details of all specimens removed, details of results of analysis (morphology or diagnosis codes), full details of smear tests processed at the laboratory. |
Data to be thus derived or calculated | Deprivation score (IMD), duration of stay, diagnostic grading of operation (benign vs pre-malignant or malignant disease), age at surgery. | Deprivation score (IMD), scoring of screening history using algorithm, whether any vault smears undertaken (also using operation date from HES). | Confirmation of whether total or subtotal hysterectomy undertaken. |
Explanatory Notes | Request full data on all West Midlands resident women who had a hysterectomy during the year, 1st April 2002 to 30th March 2003. Requires approval of HES security and confidentiality advisory group. | Request full cervical screening histories on all women identified in HES database. Requires individual permission from each of 10 database controllers. | Request full histopathology records on all women with NHS numbers identified in HES. Requires permission from each of 17 hospitals ethics committees and heads of department. |