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Diabetes
Diabetes occurs when the body either fails to make enough insulin or no longer responds to it
as it should.1
There are two main types of diabetes: type 1 and type 2. Type 1 diabetes occurs
when the body fails to make insulin in sufficient quantity. This is usually caused by an
abnormality in the body’s immune system that leads to the destruction of the cells in the
pancreas that make insulin. Type 2 diabetes occurs when the body fails to respond to insulin as
it should.
If inadequately controlled, diabetes can cause a variety of complications. Principally, these
affect blood vessels and thus the blood supply to various organs in the body. The complications
of diabetes therefore include increased risk of heart attack, kidney failure, blindness,
inadequate blood supply to the extremities (especially the feet) that can lead to ulceration and
gangrene, and inadequate blood supply to nerves, especially in the extremities, leading to loss
of touch and pain sensation. It is thus a potentially serious condition.
The risk we face
Diabetes is a relatively common condition. Barnet GPs have identified some 14,000 people with
this condition,2
although the actual number is likely to be higher. This is shown in Figure 1,
which also shows that there is considerable variation throughout London in the burden of
diabetes. This is predominantly because of differences in the Black and minority ethnic makeup
in different areas.
A major risk factor for type 2 diabetes is obesity: an obese woman is 12.7 times as likely to
develop diabetes as a woman who is not obese and an obese man is 5.2 times as likely to do
so as a man who is not.i
Unless we can curb the year-on-year rise in obesity in Barnet then the
number of people with diabetes, and thus the number of people at risk of complications and
death as a consequence, will continue to rise.
Diabetes is not only associated closely with obesity. It becomes more common with age and is
more likely to occur in someone if one or more of their close family has diabetes, and in women
who developed glucose intolerance during pregnancy.
There is also a condition called ‘pre-diabetes’ (which is also referred to as ‘impaired glucose
tolerance’ and ‘impaired fasting glucose’. This is an asymptomatic condition characterised by
higher than normal blood glucose levels and insulin resistance. Without intervention and
appropriate treatment, people with pre-diabetes are at risk of developing type 2 diabetes
within10 years.ii
The risk factors for pre-diabetes are similar to those for type 2 diabetes.
There is evidence that by identifying and treating pre-diabetes with lifestyle change and – as
necessary – drugs, type 2 diabetes can be prevented or delayed and the risk of complications
associated with the condition, such as cardiovascular disease, can be reduced.iii,iv,v
1
Much of the food we eat is converted by the body into glucose. This is needed by body cells for them to function properly.
Insulin is a hormone that enables glucose to transfer from the blood stream into cells
2
Source: Barnet PCT Quality and Outcomes Framework 2007
Figure
1: The
estimated prevalence of diabetes in London PCTs compared with the QoF-reported
prevalence in March 2007 Source: Healthcare for London Report – Diabetes Care. July 2008
The relationship between diversity and deprivation and diabetes
Diabetes is more common in Asians and Blacks, and amongst African Caribbeans it is more
common in women than in than in men, as shown in Table 25. The average age at diagnosis of
diabetes is also lower in people of African Caribbean origin, the risk of death from diabetes is
between three and six times higher, and there is a greater susceptibility to the cardiovascular
and renal complications of diabetes amongst them.
In addition, Bangladeshi men are nearly six times more likely to develop diabetes than the
general population and African Caribbean women four times as likely to do so (noting that this
is an ethnicity and gender difference: African Caribbean men are only 2.5 times as likely to
develop diabetes as the general population.
The average age at diagnosis of diabetes is also lower in people of African Caribbean origin,
the risk of death from diabetes is between three and six times higher, there is also a greater
susceptibility to the cardiovascular and renal complications of diabetes.vi
Table 1: Standardised risk ratios for diabetes by ethnic group and gender in 1999
Men Women
General
population
1.0 1.0
Irish 1.4 1.0
Indian 3.0 2.9
Pakistani 5.4 5.6
Bangladeshi 5.8 5.8
Black Caribbean 2.5 4.2
Chinese 1.4 2.1
Source: Health Survey for England, 1999, Department of Health
There may be an association between deprivation and diabetes, but this is more likely to be a
reflection of the fact that obesity is more common amongst people who live in deprived areas.
Newham
Brent
Harrow
Redbridge
Ealing
WalthamForest
TowerHamlets
Hounslow
Croydon
Enfield
Lewisham
Barking&Dagenham
Barnet
Haringey
City&Hackney
Southwark
Greenwich
Lambeth
Hillingdon
Islington
Havering
Bexley
Bromley
Kensington&Chelsea
Westminster
Hammersmith
Camden
Sutton&Merton
Kingston
Wandsworth
Richmond&Twickenham
0
1
2
3
4
5
6
Proportionofpeoplewithdiabetes(%)
QoF-reported prevalence
Estimated additional prevalence
Newham
Brent
Harrow
Redbridge
Ealing
WalthamForest
TowerHamlets
Hounslow
Croydon
Enfield
Lewisham
Barking&Dagenham
Barnet
Haringey
City&Hackney
Southwark
Greenwich
Lambeth
Hillingdon
Islington
Havering
Bexley
Bromley
Kensington&Chelsea
Westminster
Hammersmith
Camden
Sutton&Merton
Kingston
Wandsworth
Richmond&Twickenham
0
1
2
3
4
5
6
Proportionofpeoplewithdiabetes(%)
QoF-reported prevalenceQoF-reported prevalence
Estimated additional prevalenceEstimated additional prevalence
Local targets
There are no specific PCT performance targets for diabetes other than in relation to screening
for diabetic retinopathy.3
However, in collaboration with a wide variety of experts on the subject,
the Healthcare Commission has identified a number of measures that might be used to assess
the quality of diabetes control in groups of patients. The glycosylated haemoglobin level is one
such measure and reflects the level of diabetes control over the preceding few weeks. In
contrast, testing for glucose in the urine or checking the level of glucose in the blood only
shows what is happening at that point in time.
Figure 2 shows the proportion of people with ‘tightly controlled’ diabetes as measured by their
glycosylated haemoglobin level. In comparison with most other parts of London, Barnet GPs
(who are the ones predominantly caring for people with diabetes) in collaboration with GP
practice nurses, diabetes nurse specialists and hospital doctors are providing a good service.
Figure 2 The proportion of patients with diabetes who have a record of HbA1c and in
whom this is 7.5 or less in the previous 15 months
Key things that need to be done
The key activities required are:
 continuing to identify people with diabetes and impaired glucose tolerance (‘pre-diabetes’)
and to manage this effectively;
 to increase the proportion of people with diabetes in whom the last HbA1c measurement in
the last 15 months is 7.4% or less;
 to enable people with diabetes to manage their own condition more effectively;
 to maintain the current high coverage of diabetic retinopathy screening; and
to encourage and enable people to avoid and to address lifestyle risk factors that increase their
likelihood of developing diabetes.
3
Diabetic retinopathy is the most common cause of acquired blindness in people of working age. The main damage caused
by diabetes is to the lining of blood vessels (hence the increased risk of heart attack and stroke). This blood vessel damage
affects many parts of the body, including the blood vessels supplying the retina.
45%
50%
55%
60%
65%
70%
Brom
leyEnfield
W
altham
ForestBarnet
R
ichm
ond
&
Tw
ickenhamKingstonH
aringeyIslington
H
averingH
arrow
Sutton
&
M
erton
Lew
ishamLam
bethC
am
den
Southw
ark
H
am
m
ersm
ith
&
Fulham
Kensington
&
C
helsea
London
average
H
ounslow
R
edbridge
W
estm
inster
Brent
W
andsw
orthC
roydon
Barking
&
D
agenham
H
illingdon
Tow
erH
am
lets
C
ity
&
H
ackney
TeachingEalingN
ew
ham
G
reenw
ich
45%
50%
55%
60%
65%
70%
Brom
leyEnfield
W
altham
ForestBarnet
R
ichm
ond
&
Tw
ickenhamKingstonH
aringeyIslington
H
averingH
arrow
Sutton
&
M
erton
Lew
ishamLam
bethC
am
den
Southw
ark
H
am
m
ersm
ith
&
Fulham
Kensington
&
C
helsea
London
average
H
ounslow
R
edbridge
W
estm
inster
Brent
W
andsw
orthC
roydon
Barking
&
D
agenham
H
illingdon
Tow
erH
am
lets
C
ity
&
H
ackney
TeachingEalingN
ew
ham
G
reenw
ich
i
National Audit Office Tackling obesity in England. National Audit Office. London, 2001
ii
Prediabetes: Prevention and treatment for your diabetes (Accessed 8 August 2006)
http://www.dlife.com/dlife.com/dLife/do/ShowContent/prediabetes/treatment.html
iii
Tuomilehto J, Lindstrom J, Eriksson JG et al.: Prevention of type 2 diabetes mellitus by changes in lifestyle
among subjects with impaired glucose tolerance. N Eng J Med, 2001;344:1343-1350
iv
The Diabetes Prevention Research Group: Reduction in the incidence of type 2 diabetes with lifestyle
intervention or metformin. N Eng J Med, 2002; 346:393-403
v
Buanan TA, Xiang AH, Peters RK et al: Preservation of pancreatic (beta) cell function and prevention of
type 2 diabetes by pharmacological treatment of insulin resistance in high-risk Hispanic women. Diabetes,
2002;51:2796-2803
vi
Department of Health. National Service Framework for Diabetes. Department of Health. London. 2001

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Linking Demand And Overall Spend
 

Diabetes

  • 1. Diabetes Diabetes occurs when the body either fails to make enough insulin or no longer responds to it as it should.1 There are two main types of diabetes: type 1 and type 2. Type 1 diabetes occurs when the body fails to make insulin in sufficient quantity. This is usually caused by an abnormality in the body’s immune system that leads to the destruction of the cells in the pancreas that make insulin. Type 2 diabetes occurs when the body fails to respond to insulin as it should. If inadequately controlled, diabetes can cause a variety of complications. Principally, these affect blood vessels and thus the blood supply to various organs in the body. The complications of diabetes therefore include increased risk of heart attack, kidney failure, blindness, inadequate blood supply to the extremities (especially the feet) that can lead to ulceration and gangrene, and inadequate blood supply to nerves, especially in the extremities, leading to loss of touch and pain sensation. It is thus a potentially serious condition. The risk we face Diabetes is a relatively common condition. Barnet GPs have identified some 14,000 people with this condition,2 although the actual number is likely to be higher. This is shown in Figure 1, which also shows that there is considerable variation throughout London in the burden of diabetes. This is predominantly because of differences in the Black and minority ethnic makeup in different areas. A major risk factor for type 2 diabetes is obesity: an obese woman is 12.7 times as likely to develop diabetes as a woman who is not obese and an obese man is 5.2 times as likely to do so as a man who is not.i Unless we can curb the year-on-year rise in obesity in Barnet then the number of people with diabetes, and thus the number of people at risk of complications and death as a consequence, will continue to rise. Diabetes is not only associated closely with obesity. It becomes more common with age and is more likely to occur in someone if one or more of their close family has diabetes, and in women who developed glucose intolerance during pregnancy. There is also a condition called ‘pre-diabetes’ (which is also referred to as ‘impaired glucose tolerance’ and ‘impaired fasting glucose’. This is an asymptomatic condition characterised by higher than normal blood glucose levels and insulin resistance. Without intervention and appropriate treatment, people with pre-diabetes are at risk of developing type 2 diabetes within10 years.ii The risk factors for pre-diabetes are similar to those for type 2 diabetes. There is evidence that by identifying and treating pre-diabetes with lifestyle change and – as necessary – drugs, type 2 diabetes can be prevented or delayed and the risk of complications associated with the condition, such as cardiovascular disease, can be reduced.iii,iv,v 1 Much of the food we eat is converted by the body into glucose. This is needed by body cells for them to function properly. Insulin is a hormone that enables glucose to transfer from the blood stream into cells 2 Source: Barnet PCT Quality and Outcomes Framework 2007
  • 2. Figure 1: The estimated prevalence of diabetes in London PCTs compared with the QoF-reported prevalence in March 2007 Source: Healthcare for London Report – Diabetes Care. July 2008 The relationship between diversity and deprivation and diabetes Diabetes is more common in Asians and Blacks, and amongst African Caribbeans it is more common in women than in than in men, as shown in Table 25. The average age at diagnosis of diabetes is also lower in people of African Caribbean origin, the risk of death from diabetes is between three and six times higher, and there is a greater susceptibility to the cardiovascular and renal complications of diabetes amongst them. In addition, Bangladeshi men are nearly six times more likely to develop diabetes than the general population and African Caribbean women four times as likely to do so (noting that this is an ethnicity and gender difference: African Caribbean men are only 2.5 times as likely to develop diabetes as the general population. The average age at diagnosis of diabetes is also lower in people of African Caribbean origin, the risk of death from diabetes is between three and six times higher, there is also a greater susceptibility to the cardiovascular and renal complications of diabetes.vi Table 1: Standardised risk ratios for diabetes by ethnic group and gender in 1999 Men Women General population 1.0 1.0 Irish 1.4 1.0 Indian 3.0 2.9 Pakistani 5.4 5.6 Bangladeshi 5.8 5.8 Black Caribbean 2.5 4.2 Chinese 1.4 2.1 Source: Health Survey for England, 1999, Department of Health There may be an association between deprivation and diabetes, but this is more likely to be a reflection of the fact that obesity is more common amongst people who live in deprived areas. Newham Brent Harrow Redbridge Ealing WalthamForest TowerHamlets Hounslow Croydon Enfield Lewisham Barking&Dagenham Barnet Haringey City&Hackney Southwark Greenwich Lambeth Hillingdon Islington Havering Bexley Bromley Kensington&Chelsea Westminster Hammersmith Camden Sutton&Merton Kingston Wandsworth Richmond&Twickenham 0 1 2 3 4 5 6 Proportionofpeoplewithdiabetes(%) QoF-reported prevalence Estimated additional prevalence Newham Brent Harrow Redbridge Ealing WalthamForest TowerHamlets Hounslow Croydon Enfield Lewisham Barking&Dagenham Barnet Haringey City&Hackney Southwark Greenwich Lambeth Hillingdon Islington Havering Bexley Bromley Kensington&Chelsea Westminster Hammersmith Camden Sutton&Merton Kingston Wandsworth Richmond&Twickenham 0 1 2 3 4 5 6 Proportionofpeoplewithdiabetes(%) QoF-reported prevalenceQoF-reported prevalence Estimated additional prevalenceEstimated additional prevalence
  • 3. Local targets There are no specific PCT performance targets for diabetes other than in relation to screening for diabetic retinopathy.3 However, in collaboration with a wide variety of experts on the subject, the Healthcare Commission has identified a number of measures that might be used to assess the quality of diabetes control in groups of patients. The glycosylated haemoglobin level is one such measure and reflects the level of diabetes control over the preceding few weeks. In contrast, testing for glucose in the urine or checking the level of glucose in the blood only shows what is happening at that point in time. Figure 2 shows the proportion of people with ‘tightly controlled’ diabetes as measured by their glycosylated haemoglobin level. In comparison with most other parts of London, Barnet GPs (who are the ones predominantly caring for people with diabetes) in collaboration with GP practice nurses, diabetes nurse specialists and hospital doctors are providing a good service. Figure 2 The proportion of patients with diabetes who have a record of HbA1c and in whom this is 7.5 or less in the previous 15 months Key things that need to be done The key activities required are:  continuing to identify people with diabetes and impaired glucose tolerance (‘pre-diabetes’) and to manage this effectively;  to increase the proportion of people with diabetes in whom the last HbA1c measurement in the last 15 months is 7.4% or less;  to enable people with diabetes to manage their own condition more effectively;  to maintain the current high coverage of diabetic retinopathy screening; and to encourage and enable people to avoid and to address lifestyle risk factors that increase their likelihood of developing diabetes. 3 Diabetic retinopathy is the most common cause of acquired blindness in people of working age. The main damage caused by diabetes is to the lining of blood vessels (hence the increased risk of heart attack and stroke). This blood vessel damage affects many parts of the body, including the blood vessels supplying the retina. 45% 50% 55% 60% 65% 70% Brom leyEnfield W altham ForestBarnet R ichm ond & Tw ickenhamKingstonH aringeyIslington H averingH arrow Sutton & M erton Lew ishamLam bethC am den Southw ark H am m ersm ith & Fulham Kensington & C helsea London average H ounslow R edbridge W estm inster Brent W andsw orthC roydon Barking & D agenham H illingdon Tow erH am lets C ity & H ackney TeachingEalingN ew ham G reenw ich 45% 50% 55% 60% 65% 70% Brom leyEnfield W altham ForestBarnet R ichm ond & Tw ickenhamKingstonH aringeyIslington H averingH arrow Sutton & M erton Lew ishamLam bethC am den Southw ark H am m ersm ith & Fulham Kensington & C helsea London average H ounslow R edbridge W estm inster Brent W andsw orthC roydon Barking & D agenham H illingdon Tow erH am lets C ity & H ackney TeachingEalingN ew ham G reenw ich
  • 4. i National Audit Office Tackling obesity in England. National Audit Office. London, 2001 ii Prediabetes: Prevention and treatment for your diabetes (Accessed 8 August 2006) http://www.dlife.com/dlife.com/dLife/do/ShowContent/prediabetes/treatment.html iii Tuomilehto J, Lindstrom J, Eriksson JG et al.: Prevention of type 2 diabetes mellitus by changes in lifestyle among subjects with impaired glucose tolerance. N Eng J Med, 2001;344:1343-1350 iv The Diabetes Prevention Research Group: Reduction in the incidence of type 2 diabetes with lifestyle intervention or metformin. N Eng J Med, 2002; 346:393-403 v Buanan TA, Xiang AH, Peters RK et al: Preservation of pancreatic (beta) cell function and prevention of type 2 diabetes by pharmacological treatment of insulin resistance in high-risk Hispanic women. Diabetes, 2002;51:2796-2803 vi Department of Health. National Service Framework for Diabetes. Department of Health. London. 2001