3303.0 - Causes of Death, Australia, 2013 Quality Declaration
Previous ISSUE Released at 11:30 AM (CANBERRA TIME) 31/03/2015
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Type 1 and Type 2 Diabetes are the two main types of diabetes mellitus. Type 2 Diabetes has links to both genetic and lifestyle factors, whereas Type 1 Diabetes is not a lifestyle disease (Diabetes Australia). Over a 10 year time frame Type 2 Diabetes has increased by 37.5% as an underlying cause of death, rising from 1,428 deaths in 2004 to 1,964 in 2013. This is in contrast to Type 1 Diabetes which showed an 11.3% decrease in the same period, declining from 364 deaths in 2004 to 323 deaths in 2013. Table 2.3 shows the breakdown of deaths due to Type 1 Diabetes, Type 2 Diabetes, and Diabetes mellitus in total over a ten year time frame.
(d) Type 2 Diabetes: E11 Non-insulin dependent diabetes mellitus.
(e) Total Diabetes: E10, E11; E12: Malnutrition related diabetes mellitus; E13: Other specified diabetes mellitus; E14: Unspecified diabetes mellitus.
In 2013, for all deaths assigned an underlying cause of Type 2 Diabetes, there were on average 5.4 conditions that appeared on the death certificate. This compares to an average of 3.3 conditions listed on all death certificates. Due to the high number of associated causes of death reported on a death certificate with an underlying cause of Type 2 Diabetes, the multiple cause dataset offers greater insight into these deaths. Multiple causes include all conditions reported on the death certificate, whereas associated causes are all conditions on the death certificate other than the underlying cause of death.
Among deaths assigned an underlying cause of Type 2 Diabetes, the most common associated causes were diseases of the circulatory system. In 2013, 49.9% of deaths due to Type 2 Diabetes were reported with Ischaemic Heart Diseases (I20-I25) as an associated cause of death. Other commonly listed associated causes included Other forms of heart disease (I30-I52) and Hypertension (I10), with these conditions listed on 42.0% and 33.9% of certificates respectively.
Importantly, Type 2 Diabetes is more likely to be reported as an associated cause of death as opposed to an underlying cause of death. In these instances the certifier has recognised the diabetes as having a negative impact on the train of events leading to the person's death, but the diabetes did not initiate the train of morbid events. There has been a 41.5% increase in Type 2 diabetes as an associated cause of death over the 10 years from 2004 to 2013 (5,841 deaths in 2013 compared with 4,129 in 2004).
When Type 2 Diabetes is reported as an associated cause of death, Ischaemic heart diseases (I20-I25) are the most frequent underlying cause of death. In 2013 there were 1,203 deaths due to Ischaemic heart diseases I20-I25 with Type 2 Diabetes reported as an associated cause of death. Dementia and Alzheimer's disease (F01, F03, G30) were the second highest underlying cause of death to have Type 2 Diabetes reported as an associated cause, with 535 deaths reporting both conditions on the death certificate.
Other conditions likely to be an underlying cause of death with Type 2 Diabetes reported as an associated cause are certain specified malignant neoplasms (C00-C97, D45). The three malignant neoplasms most likely to have Type 2 Diabetes reported as an associated cause of death are Malignant neoplasm of bronchus and lung (C34), Malignant neoplasm of pancreas (C25) and Malignant neoplasm of prostate (C61), with 265, 143 and 136 deaths, respectively.
Type 2 Diabetes also appears frequently with kidney disease and other complications of the renal system. Rather than appearing as an associated cause, the renal complications are linked to the diabetes code as a fourth digit and output as an underlying cause of death with the code E112 Non-insulin dependent diabetes mellitus with renal complications. In 2013, 577 deaths were due to E112, meaning that 29.3% of deaths due to Type 2 Diabetes were reported with renal complications.
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