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PHIS2013 H7. Age-standardised Data for Selected Principal Procedures 1994-2011

Creator:

Information Unit, Department of Health

Subject Keywords: Age-standardised discharge data and standardised morbidity ratios for selected principal procedures.
Topic: Chronic Conditions
Catalogue: Data
Secondary Data Sources - Indicator Sets
Type: Table
Region: Republic of Ireland
Description:

The data reported in this table are derived from the HIPE (Hospital In-Patient Enquiry) data set, which records data on discharges from all publicly funded acute hospitals. Age-standardised discharge rates by county, sex and principal procedures are presented. These allow comparison of discharge rates between populations of different age composition, and also of discharge rates over time.

This table covers the years from 1994 to 2011. Data are classified by principal procedure categories. The procedure categories are based on the ICD-9-CM classification from 1994 – 2004, and the ICD-10-AM classification. Data for 1995 to 2004 were classified using ICD-9-CM. All HIPE discharges from 2005 are now coded using ICD-10-AM (The Australian Modification of ICD-10 incorporating the Australian Classification of Health Interventions). The ICD-10-AM classification of procedures is significantly different to the ICD-9-CM classification which makes comparison of procedures activity between 1994-2004 and 2005-2011 very difficult. However, certain surgical procedures can be mapped reasonably well across the two classifications, and a shortlist of 20 of these procedures is provided in this table. This data is based on principal procedure only, as the ICD-9-CM and ICD-10-AM classifications differ on the coding of separate procedure components.

The age-standardised discharge rate (SDR) for an area is the number of discharges (per 100,000) that would occur if that area had the same age structure as the WHO European Standard Population and the local age-specific rates for that area applied. Confidence intervals for these rates are also presented. Standardised Morbidity Ratios (SMRs) are also included. SMRs express the difference between the observed discharges in each county compared to the expected discharges if the age-specific rates of the national population applied. It is presented as a ratio. A ratio that is greater than 100 indicates that county experienced higher discharges than would be expected. A ratio of less than 100 indicates that county experienced lower discharges than would be expected. Confidence intervals for these rates are also presented.

The data reported in this table are derived from the HIPE (Hospital In-Patient Enquiry) data set, which records data on discharges from all publicly funded acute hospitals. Age-standardised discharge rates by county, sex and principal procedures are presented. These allow comparison of discharge rates between populations of different age composition, and also of discharge rates over time.

The age-standardised discharge rate (SDR) for an area is the number of discharges (per 100,000) that would occur if that area had the same age structure as the WHO European Standard Population and the local age-specific rates for that area applied. Confidence intervals for these rates are also presented. Standardised Morbidity Ratios (SMRs) are also included. SMRs express the difference between the observed discharges in each county compared to the expected discharges if the age-specific rates of the national population applied. It is presented as a ratio. A ratio that is greater than 100 indicates that county experienced higher discharges than would be expected. A ratio of less than 100 indicates that county experienced lower discharges than would be expected. Confidence intervals for these rates are also presented.

NOTES:

1. SMRs and SDRs based on a small number of cases should be viewed with caution. Similarly, confidence intervals based on less than 50 cases should be viewed with caution as larger, less exact confidence intervals are produced.

2. The SMRs presented cannot be used to compare counties with each other, as each county’s population structure weights the age-specific morbidity rates differently. #

3. It should be noted that persons who are hospitalised several times during the course of the year are recorded in the statistics for each episode of hospitalisation. For these and other reasons, the data should not be used as a proxy for prevalence. It provides indicators of public hospital utilisation and should be interpreted in this context.

4. Discharges from private hospitals are not included.

5. Data relating to non-residents are not included in this table.

6. For historical reasons a small number of non-acute hospitals are included in HIPE. This activity represents a small proportion of all activity in HIPE.

 

Date:

10/03/2014

Rights: © Information Unit, Department of Health
Suggested citation:

Information Unit, Department of Health. (2014) PHIS2013 H7. Age-standardised Data for Selected Principal Procedures 1994-2011 [Online]. Available from: http://publichealthwell.ie/node/98911 [Accessed: 23rd August 2019].

  

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