Respiratory diseases hospitalisations by disease type, LHD and year

Females, All LHDs
281 (275.8, 286.2)Females, Far West
336.6 (253.7, 436.9)Females, Western NSW
457 (423.4, 492.5)Females, Murrumbidgee*
345.1 (317.1, 374.8)Females, Southern NSW
335 (301.6, 371)Females, Mid North Coast
340.6 (307.3, 376.2)Females, Northern NSW
300.3 (273.9, 328.4)Females, Hunter New England
266.1 (251.8, 280.8)Females, Central Coast
255.4 (233.4, 278.8)Females, Northern Sydney
247 (233.3, 261.4)Females, Nepean Blue Mountains
321.2 (295.5, 348.5)Females, Western Sydney
292.5 (276.4, 309.4)Females, Illawarra Shoalhaven
299.7 (277.4, 323.3)Females, South Eastern Sydney
234.1 (220.4, 248.3)Females, South Western Sydney
282.8 (267.5, 298.7)Females, Sydney
228.3 (211.3, 246.2)Males, All LHDs
364.9 (358.7, 371.1)Males, Far West
416.5 (322.9, 528.2)Males, Western NSW
548.5 (510.8, 588.3)Males, Murrumbidgee*
504.3 (469.7, 540.8)Males, Southern NSW
438 (399.6, 479.1)Males, Mid North Coast
429.6 (393.1, 468.4)Males, Northern NSW
375.5 (346, 406.8)Males, Hunter New England
362.5 (345.6, 380.1)Males, Central Coast
323.5 (297.9, 350.8)Males, Northern Sydney
292.4 (276.6, 308.9)Males, Nepean Blue Mountains
405.6 (373.1, 440)Males, Western Sydney
388.8 (367.9, 410.4)Males, Illawarra Shoalhaven
348.1 (323.6, 374)Males, South Eastern Sydney
316.9 (300, 334.5)Males, South Western Sydney
356.9 (338.4, 376.2)Males, Sydney
322.4 (300.7, 345.2)
 
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Notes

NSW Admitted Patient Data Collection and ABS population estimates (SAPHaRI). Centre for Epidemiology and Evidence, NSW Ministry of Health.

COPD= chronic obstructive pulmonary disease. Only NSW residents are included. Figures are based on where a person resides, not where they are treated. Hospital separations were classified using ICD-9-CM up to 1997-98 and ICD-10-AM from 1998-99 onwards. Rates were age-adjusted using the Australian population as at 30 June 2001. Numbers for the two latest years include an estimate of the small number of hospitalisations of NSW residents in interstate public hospitals, data for which were unavailable at the time of production. LL/UL 95%CI = lower and upper limits of the 95% confidence interval for the point estimate. Murrumbidgee * Local Health District includes Albury Local Government Area.

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Methods: Local Health Districts

Local Health Districts (LHDs) are health administrative areas constituted under Section 17 of the NSW Health Services Act, 1997 which became effective from January 2011 and were initially called Local Health Networks.

There are 15 geographically-based LHDs (8 covering the Sydney metropolitan region and 7 rural and regional NSW) and two specialist networks focussing on Children's and Paediatric Services and Forensic Mental Health. A third network operates across the public health services provided by three Sydney facilities operated by St Vincent's Health: these include St Vincent's Hospital and the Sacred Heart Hospice at Darlinghurst and St Joseph’s at Auburn.

LHDs replaced the former Area Health Services and have their own budgets, management and accountabilities. Geographically-based LHDs are overseen by Governing Boards. Please refer to the NSW Health website for a list of Local Health Districts and the membership of Boards.  

Local Health Districts are:

Metropolitan NSW: Central Coast, Illawarra Shoalhaven, Nepean Blue Mountains, Northern Sydney, South Eastern Sydney, South Western Sydney, Sydney, Western Sydney.

Rural & regional NSW:  Far West, Hunter New England, Mid North Coast, Murrumbidgee, Northern NSW, Southern NSW, Western NSW

Smoothing of estimates for rare conditions analysed by Local Health District in this report

The term ‘small area’ refers to a small geographical area and a small population. Data from a small area are characterised by considerable variability. Smoothing is a general term for statistical methods used to reduce the random variability of data. Examples include rounding, moving averages, extending the period of time in which cases are counted or increasing the size of the areas. In addition, Bayesian statistical smoothing can be used to adjust raw estimates in small areas by taking into account information from adjacent areas (local or spatial variability) and from the whole state (global or non-spatial variability).

In this report, extending the period of time, in which cases in the Local Health Districts are counted, was the most frequently used smoothing technique. Results for some Local Health Districts were completely suppressed in few indicators due to very low numbers and privacy concerns.  Refer to Notes under the graphs or Methods tabs for confirmation of suppression and the smoothing technique used.

References

NSW Health. Home page. Last updated 1 July 2011. Available at http://www.health.nsw.gov.au/services/pages/default.aspx

 


Methods: Respiratory diseases

Inclusion of lung cancer with respiratory diseases

Lung cancer is excluded from some analyses of respiratory diseases (collectively) in this report, as it is classified with cancers, not with respiratory diseases, in the International Statistical Classification of Diseases  and Related Health Problems (ICD-9-CM, ICD-10-AM), which is the coding system used for health data in NSW.

Lung cancer is included with respiratory diseases in selected analyses in this report. It is appropriate, from a clinical and health services planning perspective, to include lung cancer together with other respiratory diseases when considering the burden of respiratory disease. When lung cancer is included in the analysis it is always made explicit.


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Codes: Selected respiratory diseases

The International Statistical Classification of Diseases and Related Health Problems

National Centre for Classification in Health, Australia; CM - Clinical Modification; AM - Australian Modification

DescriptionICD-9 & ICD-9-CMICD-10 & ICD-10-AMComments
Asthma 493 J45,J46 All records are included, NSW residents only, all ages.
Cancer: lung 162 C33-C34 All records are included, NSW residents only, all ages.
Chronic obstructive pulmonary disease 491-492, 496 J41-J44 All records are included, NSW residents only, all ages.
Influenza and pneumonia 480-487 J09-J18 All records are included, NSW residents only, all ages.

 


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Related Indicators

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Hospitalisations by category of cause

Number, rate and proportion by category of cause, sex, age, Local Health District, Medicare Local, remoteness from service centres and year.
 
 

Respiratory diseases deaths

Number and rate by disease type,sex and year
 
Key points: Respiratory disease

• In 2012 in NSW, around 9% of adult males and 13% of adult females had asthma, and in 2009 and 2010, around 15% of boys and 11.5% of girls aged 2-15 years had asthma. Asthma was responsible for 130 deaths in 2007 and around 12,000 hospitalisations in 2010-11.

• Chronic obstructive pulmonary disease (COPD), which includes chronic bronchitis and emphysema, was responsible for over 1,700 deaths in 2007 in NSW and almost 20,000 hospitalisations in 2010-11.

• In 2007, 75% of all deaths from chronic obstructive pulmonary disease in NSW and 91% of all lung cancer deaths were attributable to smoking. In 2009-10, smoking caused around 80% of all hospitalisations for chronic obstructive pulmonary disease and lung cancer.

• Asbestosis is a chronic lung disease that is associated with occupational exposure to asbestos.  Total hospitalisations due to asbestos in NSW have decreased in the past five years. 

• Death rates from respiratory tuberculosis have remained low and stable since 1994 in NSW.

• The rate of new cases of malignant mesothelioma (a cancer that is associated with past exposure to asbestos) more than doubled in NSW between 1986 and 2003. It has been slowly decreasing since then.


Introduction: Respiratory disease

 Respiratory diseases

Respiratory diseases include acute diseases, such as influenza and pneumonia, and chronic respiratory diseases (specifically asthma, chronic obstructive pulmonary disease, asbestosis, and respiratory tuberculosis), where preventive measures and better management of conditions can reduce the burden of disease and reduce associated healthcare costs. Respiratory diseases, including lung cancer, were together responsible for around 14% of all deaths in NSW in the period 2003 to 2007, and about 5% of hospital separations in 2008-09.

Chronic respiratory diseases were responsible for 7.1% of total burden of disease and injury in Australia in 2003, with chronic obstructive pulmonary disease and asthma accounting for 46% and 34% of this burden, respectively (Begg et al. 2007).

Influenza and pneumonia

Influenza and pneumonia are acute respiratory diseases that can be very severe and, in persons at high risk, can lead to death. Influenza and pneumonia cause around 1.8% of all deaths and around 0.9% of hospital separations and are an important cause of hospitalisations in the very young, and of death and hospitalisations among older age groups.

Asthma

Asthma is a significant public health problem in Australia and it is estimated that Australian prevalence rates are among the highest in the world. Fortunately, recent studies in children show no further increase in prevalence. The overall prevalence of asthma reported in Australia was 9.9%, down from 11.6% in the 2001 ((ABS Cat. no. 4364.0 2009).  Among children asthma is the most prevalent long term condition in Australia. In Australia in 2003, asthma was estimated to account for 2.3% of the disease burden (Begg et al. 2007).

Chronic obstructive pulmonary disease

Chronic bronchitis and emphysema are the two main conditions comprising chronic obstructive pulmonary disease (COPD). In Australia in 2003, COPD was estimated to account for 2.9% of the disease burden.

Tuberculosis

Tuberculosis (TB) is caused by the bacterial organism Mycobacterium tuberculosis. Despite the increasing burden from respiratory tuberculosis globally, it is not a major public health problem in NSW. In fact the mortality and morbidity from all types of tuberculosis in NSW is one of the lowest in the world.

Lung cancer

Lung cancer is excluded from analyses of respiratory diseases, as it is classified with cancers, and not with respiratory diseases, in the International Classification of Diseases (the coding system used for health data in NSW). However, some indicators analysing respiratory diseases explicitly include lung cancer to provide a more appropriate measure of the burden of respiratory disease from a clinical and health services planning perspective.

Risk factors

Cigarette smoking is the main risk factor for both COPD and lung cancer and the current incidence rates of these conditions reflect smoking rates 20 years and more in the past. Lung cancer is one of the leading causes of death in Australia.

References

Australian Bureau of Statistics. National Health Survey: Summary of Results, 2007-2008 (Reissue). Cat. no. 4364.0. Canberra: ABS, 2009. Available at http://www.abs.gov.au/ausstats/abs@.nsf/mf/4364.0/

Begg S, Vos T, Barker B. The burden of disease and injury in Australia, 2003. Cat. no. PHE 82 edition. Canberra: AIHW, 2007. Available at http://www.aihw.gov.au/publications/index.cfm/title/10317

 


Interventions: Respiratory diseases

Potentially preventable hospitalisations for chronic conditions

The most common chronic conditions defined as potentially preventable hospitalisations or ambulatory care sensitive hospitalisations are included in the NSW Severe Chronic Disease Management Program.

In response to the Garling Report 2008, the NSW Department of Health is implementing the NSW Severe Chronic Disease Management Program. This program is being overseen by the Chronic Disease Management Office to improve the quality of life of older people with chronic and complex conditions, their carers and families and to prevent unplanned and avoidable hospital admissions. It achieves this by coordinating a statewide chronic disease management approach.

The NSW Severe Chronic Diseases Management Program is focused on five major chronic diseases of interest that are recognised as having a major impact on the burden of disease in NSW. Furthermore, these conditions have been demonstrated to have improved outcomes through CDM approaches. The diseases of interest are Chronic Obstructive Pulmonary Disease (mainly emphysema and chronic bronchitis); Coronary Artery Disease (also known as coronary or ischaemic heart disease); Diabetes; Hypertension (high blood pressure); and Congestive Heart Failure.

People who are diagnosed with these diseases and who are experiencing repeated episodes in hospital are offered enrolment to the program. In the future the program will expand and be offered to people with these conditions even if they are not being admitted to hospital frequently to prevent their deterioration.

Asthma

Written asthma management plans are recommended as part of the National Guidelines for the management of asthma (NAC, 2002). They enable people with asthma to recognise a deterioration in their condition and initiate appropriate treatment, thereby reducing the severity of acute episodes.

The National Asthma Campaign publicised the Six Step Plan for the identification and management of more severe cases of asthma, where preventive therapy is recommended.

Tuberculosis

The NSW Tuberculosis Program is successful as the incidence of tuberculosis in NSW remained  stable over the last decade despite large-scale migration from high-prevalence countries and the  treatment success rates have been high, with the absence of treatment failures and low rates of relapse of cases initially treated in Australia.

The main challenges to the NSW Tuberculosis Program are similar to those that face tuberculosis control globally. They include control of multi-drug resistant and extreme drug-resistant tuberculosis and identification and management of tuberculosis-HIV coinfection (O'Connor et al. 2009).

Influenza and Pneumonia

Influenza and pneumococcal disease are covered by the National Immunisation Programs in NSW.

Influenza has been a notifiable disease by all laboratories under the Public Health Act in NSW since 2001. Surveillance is enhanced in winter months when the NSW Department of Health collects and reports weekly on influenza-like illness presentations to Emergency Departments , through the Public Health Real-time Emergency Department Surveillance System (PHREDSS), and laboratory confirmed diagnoses of influenza virus infections.

Emergency Departments in NSW are prepared for influenza epidemics with peak visit plans and similar measures in winter months.

References

NSW Department of Health . NSW Chronic Care Program: Phase Three: 2006-2009, NSW Chronic Disease Strategy: Executive Summary. Sydney: NSW Department of Health, 2006.

NSW Premier's Department. A new direction for NSW. State Plan. Sydney: NSW Premier's Department, 2006. Available at http://www.nsw.gov.au/stateplan/index.aspx?id=8f782cbd-0528-4077-9f40-75af9e4cc3e5

O'Connor B, Fritsche L, Christensen A, McAnulty J. EpiReview: Tuberculosis in New South Wales, 2003-2007. 2009. Available at www.publish.csiro.au/index.cfm?act=view_file&file_id=NB09001.pdf


For more information: Respiratory diseases

Useful websites include:

Australian Centre for Asthma Monitoring at http://www.asthmamonitoring.org

National Asthma Council Australia at http://www.nationalasthma.org.au

Australian Bureau of Statistics at http://www.abs.gov.au

Australian Institute of Health and Welfare at http://www.aihw.gov.au

HealthInsite at http://www.healthinsite.gov.au