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Cataract Operations

Volume 455: debated on Tuesday 16 January 2007

To ask the Secretary of State for Health how many cataract operations were carried out at (a) Good Hope Hospital and (b) Sir Robert Peel Hospital in each of the last 10 years. (112820)

The information for the Sir Robert Peel Hospital is not collected centrally. However, data relating to the Good Hope Hospital National Health Service Trust have been set out in the table.

The table shows the number of cataract operations undertaken at Good Hope Hospital NHS Trust each year since 1999. Prior to this date no cataract operations were performed at the trust.

Count of finished in year admission episodes where cataracts were the main operation

















1. Main operation

The main operation is the first recorded operation in the HES data set and is usually the most resource intensive procedure performed during the episode. It is appropriate to use main operation when looking at admission details, eg time waited, but the figures for “all operations count of episodes” give a more complete count of episodes with an operation.

2. OPCS codes:

C71 Extracapsular extraction of lens

C72 Intracapsular extraction of lens

C74 Other extraction of lens

C75 Prosthesis of lens

Primary care trust (PCT) and strategic health authority (SHA) data quality PCT and SHA data were added to historic data-years in the HES database using 2002-03 boundaries, as a one-off exercise in 2004. The quality of the data on PCT of Treatment and SHA of Treatment is poor in 1996-97, 1997-98 and 1998-99, with over a third of all finished episodes having missing values in these years. Data quality of PCT of general practitioner (GP) practice and SHA of GP practice in 1997-98 and 1998-99 is also poor, with a high proportion missing values where practices changed or ceased to exist. There is less change in completeness of the residence-based fields over time, where the majority of unknown values are due to missing postcodes on birth episodes. Users of time series analysis including these years need to be aware of these issues in their interpretation of the data.

3. Finished in-year admissions

A finished in-year admission is the first period of in-patient care under one consultant within one healthcare provider, excluding admissions beginning before 1 April at the start of the datayear. Please note that admissions do not represent the number of in-patients, as a person may have more than one admission within the year.


Hospital Episode Statistics (HES), The Information Centre for health and social care.