joint strategic needs assessment foundation profile - JSNA

Interative Hull Atlas: www.hullpublichealth.org/Pages/hull_atlas.htm More information: www.jsnaonline.org and www.hullpublichealth.org
by number of patients 75 – see section 6.9 on page 131 for more information on the
IMD). Therefore, these two tables should be considered when interpreting any
prevalence figures at practice level, and caution should be used when comparing
practices.
12.14 PBS Diabetes Model
As part of Yorkshire and Humber (Y&H) Public Health Observatory (PHO) work to create
a Diabetes Commissioning Toolkit, the prevalence of diabetes was estimated for all
PCTs in England (Merrick 2006) in different phases. The work was undertaken in
conjunction with the (Y&H) PHO, Brent PCT and School of Health and Related
Research (ScHARR) and the model is referred to as the PBS model (taking the first
letter of each of these organisations).
For more information about the modelled and synthetic estimates, see section 12.1 on
page 770.
In Phase 1, the PBS model applied age-gender-ethnic group specific estimates of
diagnosed and undiagnosed diabetes prevalence derived from epidemiological
population studies and applied these estimates to local resident populations based on
the 2001 Census. No single epidemiological study gave the age-gender specific
prevalence of type 1 and type 2 diabetes for all ethnic groups. The following UK studies
were used:
The White and Asian type 2 age-gender-ethnic specific prevalence rates from a
Coventry study which including those with previously known and newly diagnosed
(by oral glucose tolerance test) type 2 diabetes (Simmons, Williams et al. 1991;
Simmons and Williams 1993).
The Black type 2 age-sex-ethnic specific prevalence rates used in the PBS model
were those observed in European white population in the Coventry diabetes
study, multiplied by age-gender specific excess diabetes risk ratios derived from
a comparison of Black African-Caribbean and European white populations in a
London (Brent) study (Chaturvedi, McKeigue et al. 1993).
Type 1 age-gender specific prevalence rates from a study of 418,200 people in
Wales using a capture-recapture technique with the same prevalence rates
applied to all ethnic groups (Harvey, Craney et al. 2002).
75 The IMD 2007 score is used for each patient (based on their postcode and assigning the score relating
to the lower layer super output area – geographical area containing on average 1,500 residents – which
includes their postcode). The mean score for each practice is weighted by the population (i.e. number of
patients with that specific IMD 2007 score).
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