4816.0.55.001 - Occasional Paper: Long-term Health Conditions - A Guide To Time Series Comparability From The National Health Survey, Australia, 2001  
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 04/06/2003   
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Assessment:

1989-90 to 1995 . .
1995 to 2001 NA
      NHS1989-9019952001
      Question description
      Included in Q230, "- DO YOU HAVE ANY CONDITIONS LIKE THESE?"
      Prompt card 5 was shown which included "DIABETES OR HIGH BLOOD SUGAR (Specify)" among a list of 41 conditions.
      Q417 asked "HAVE YOU EVER BEEN TOLD BY A DOCTOR OR NURSE THAT YOU HAVE-
      DIABETES
      HIGH SUGAR LEVELS IN YOUR BLOOD OR URINE?"
      Subsequent questions 418-420 establish whether the diabetes/high sugar levels are still current and the type of diabetes.
      Response categories included:
      "Non-insulin Dependent Diabetes Mellitus (Type 2)".
      Q500 asked "...HAVE YOU EVER BEEN TOLD BY A DOCTOR OR NURSE THAT YOU HAVE -
      DIABETES
      HIGH SUGAR LEVELS IN YOUR BLOOD OR URINE?"
      Subsequent questions 501-508 establish age of diagnosis, type of diabetes/high sugar levels, whether the diabetes/high sugar levels are still current and long-term.
      Response categories included:
      "Type 2 (Non-Insulin Dependent Diabetes Mellitus, Adult Onset Diabetes)".
      ICD-9 codes250.0
      NHS codes used. .079 689,948
      NotesCannot separate into types of diabetes. Add code 106 to include high sugar levels. Need to select diabetes as a "current" condition.
      Estimate '000. .173.4433.8
      Standardised rate per 1,000 population(a). .10.222.9
      95 % confidence intervals on standardised rates. . 8.5 - 11.921.0 - 24.8
      CommentsFrom 1995 to 2001 the level of reported type 2 diabetes has increased more than two-fold, while the level of unknown/unspecifed diabetes declined by 75%. These opposing trends have a degree of cancelling each other overall, but renders the type 2 time series not acceptable.
      (a) Age standardised to 2001 NHS benchmark population.

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