4324.0.55.001 - Microdata: Australian Health Survey, National Health Survey, 2011-12 Quality Declaration
ARCHIVED ISSUE Released at 11:30 AM (CANBERRA TIME) 11/05/2017
Page tools: Print Page Print All | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
USING THE BASIC CURF
The nature of the changes made, and the relatively small number of records involved ensure that the effects on data for analysis purposes is considered negligible. These changes also mean that estimates produced from the Basic CURF may differ from those published in Australian Health Survey: First Results, 2011-12 (cat. no. 4364.0.55.001), subsequent publications and/or the Expanded CURF. Detailed information about the data collected, comments regarding data quality and other points to assist in using and interpreting the data are contained in Australian Health Survey: Users' Guide, 2011-13 (cat. no. 4363.0.55.001). It is recommended that relevant parts of the guide be read in conjunction with the use of the NHS 2011-12 Basic CURF. COUNTS AND WEIGHTS NUMBER OF RECORDS BY LEVEL, NHS 2011-12 BASIC CURF
*Note: Biomedical persons (Benchmarked weight) must be used to produce population estimates of persons 5 years and over with the specified biomedical characteristics, rather than Persons (Benchmarked weight). The Biomedical persons (Benchmarked weight) applies a weight of 0 to children under 5 years and biomedical non-participants, ensuring that they do not contribute to the population estimate. IDENTIFIERS
Copying information across levels The following SAS code is an example of copying information from a lower level to a level above:
For more information regarding merges across levels (including sample SPSS and Stata code), see SAMPLE CODE AND USING CURFS. MULTI-RESPONSE ITEMS A number of questions in the survey allowed respondents to provide one or more responses. Each response category for these multi-response data items is treated as a separate data item. On the CURF, these data items share the same identifier (SAS name) prefix, but are each separately suffixed with a letter - A for the first response, B for the second response, C for the third response and so on. For example, the multi-response data item 'Days in last week consumed alcohol' has seven response categories (excluding 'Not applicable' and 'No alcohol consumed in last week'). There are seven data items named ALCDYWA, ALCDYWB, ALCDYWC...ALCDYWG. Each data item in the series will have either a positive response code or a null response code, with the exception of the first item in the series, ALCDYWA. ALCDYWA has four potential response codes: the positive response code 1 - 'Monday', the code 0 - null response, as well as the two additional response codes, code 8 - 'No alcohol consumed in last week' and code 9 - 'Not applicable'. The remaining items ALCDYWB--G have just the two response codes each, either null response or a valid response corresponding to the day of the week. The data item list identifies all multi-response items and lists the corresponding codes and response categories. Note that the sum of individual multi-response categories will be greater than or equal to the population applicable to the particular data item as respondents are able to select more than one response. RELIABILITY OF ESTIMATES As the survey was conducted on a sample of private households in Australia, it is important to take account of the method of sample selection when deriving estimates from the CURF. This is particularly important as a person's chance of selection in the survey varied depending on the state or territory in which the person lived. If these chances of selection are not accounted for, by use of appropriate weights, the results will be biased. For details on the NHS weighting process, see Weighting, Benchmarks and Estimation procedures in Australian Health Survey: Users' Guide, 2011-13 (cat. no. 4363.0.55.001). Each person record has a main weight (NHSFINWT). This weight indicates how many population units are represented by the sample units. When producing estimates of sub-populations from the CURF, it is essential that they are calculated by adding the weights of persons in each category and not just by counting the sample number in each category. If each person's weight were to be ignored when analysing the data to draw inferences about the population, then no account would be taken of a person's chance of selection or of different response rates across population groups, with the result that the estimates produced could be biased. The application of weights ensures that estimates will conform to an independently estimated distribution of the population by age, by sex, etc. rather than to the distributions within the sample itself. Each person record on the CURF contains 60 replicate weights in addition to the main weight. Replicate weights can be used to calculate measures of sampling error. For details on sampling error calculations and replicate weights, see Technical Note. CODING ISSUES Issues have been identified with the coding of the 2011-12 data for the conditions 'Back pain/problem, disc disorder', 'Diseases of the digestive system', 'Symptoms, signs and conditions not elsewhere classified', 'Rheumatism' and 'Other diseases of the musculoskeletal system and connective tissue'. Analysis indicates that at the national level:
Therefore, 2011-12 data for these conditions are not comparable to other years. However, 2014-15 data have been correctly coded. BASIC CURF FILES ASCII text format files These files contain the raw confidentialised survey data in hierarchical comma delimited ASCII text format. NHS11B.csv contains all levels NHS11BHH.csv contains Household level data NHS11BSP.csv contains Person level data NHS11BA3.csv contains Alcohol day level data NHS11B14.csv contains Alcohol type level data NHS11BAC.csv contains Actions level data NHS11BCN.csv contains Conditions level data NHS11BMD.csv contains Medications level data NHS11BBI.csv contains Biomedical level data SAS files These files contain the data for the CURF in SAS format. NHS11BHH.sas7bdat contains Household level data NHS11BSP.sas7bdat contains Person level data NHS11BA3.sas7bdat contains Alcohol day level data NHS11B14.sas7bdat contains Alcohol type level data NHS11BAC.sas7bdat contains Actions level data NHS11BCN.sas7bdat contains Conditions level data NHS11BMD.sas7bdat contains Medications level data NHS11BBI.sas7bdat contains Biomedical level data SPSS files These files contain the data for the CURF in SPSS format. NHS11BHH.sav contains Household level data NHS11BSP.sav contains Person level data NHS11BA3.sav contains Alcohol day level data NHS11B14.sav contains Alcohol type level data NHS11BAC.sav contains Actions level data NHS11BCN.sav contains Conditions level data NHS11BMD.sav contains Medications level data NHS11BBI.sav contains Biomedical level data STATA files These files contain the data for the CURF in Stata format. NHS11BHH.dta contains Household level data NHS11BSP.dta contains Person level data NHS11BA3.dta contains Alcohol day level data NHS11B14.dta contains Alcohol type level data NHS11BAC.dta contains Actions level data NHS11BCN.dta contains Conditions level data NHS11BMD.dta contains Medications level data NHS11BBI.dta contains Biomedical level data Information files FORMATS.sas7bcat is a SAS library containing formats NHS11B.sas contains a SAS program to load NHS11B.csv and the SAS formats into SAS for Windows IMPORTANT INFORMATION.pdf describes the file contents of the CURF and information on using the CURF COPYRITE1.bat describes Copyright obligations for CURF users Frequency files The following plain text format files contain data item code values and category labels at each level. Weighted frequencies are included for the household, person and biomedical levels. FREQUENCIES_NHS11BHH.txt contains Household level data FREQUENCIES_NHS11BSP.txt contains Person level data FREQUENCIES_NHS11BA3.txt contains Alcohol day level data FREQUENCIES_NHS11B14.txt contains Alcohol type level data FREQUENCIES_NHS11BAC.txt contains Actions level data FREQUENCIES_NHS11BCN.txt contains Conditions level data FREQUENCIES_NHS11BMD.txt contains Medications level data FREQUENCIES_NHS11BBI.txt contains Biomedical level data Document Selection These documents will be presented in a new window.
|