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| TAB4 Cohort Epidemiology Package |
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| TAB4 is a statistical analysis system for the tabulation of the experience of a defined cohort. This is performed by creating a multi-dimensional matrix, where each dimension represents one of the stratification parameters, sixteen of which are currently defined. These include age, sex, gender, employment factors and many others, particularly those associated with an individuals "exposure", (radiation or chemical) during their lifetime. |
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| An analysis is performed, allocating the experience of the cohort as person-days, to the elements of this matrix. At the same time, any deaths or morbidity notifications (cancer registrations) occurring amongst the analysis population are described in terms of one or more defined disease groups, together with the necessary information to identify the element of the matrix in which the observation occurred. |
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| These two data sets, (experience and observations) can then be combined to produce various reports summarising the cohort experience and mortality/morbidity of the analysis population. |
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| The available reports include the facility to compare the cohorts mortality/morbidity rate to those calculated from standardised figures. These standardised rates are provided by a queryable database (HM database) which at present holds national mortality and cancer registration rates for England and Wales, Scotland and various UK localities. These allow comparisons to take account of disease trends applicable to the cohorts geographical distribution. |
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| Other reports include internal trend analysis and facilities tailored for use upon Radiation Worker cohorts such as calculation of person-year weighted mean dose values. |
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| The outputs from TAB4 are easily imported into standard data processing packages such as SAS, Splus or MS Excel. This is one of the prime ways in which TAB4 is presently utilised by the Occupational Health / Medical Statistics Department of Westlakes Research Institute. |
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| A draft report on the methodology and capabilities of TAB4 can be made available to interested parties and will be published later this year. A list of published papers resulting from the application of TAB4 is also available through our publications section. |
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| Further information about TAB4 or our epidemiological facility can be obtained from: |
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| Mr Andrew Wilson |
| Tel: 01946 514000 |
| Email: tab4@westlakes.ac.uk |
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