Aged Care Residents Influenza Vaccination Survey, November 2004
Contents
H. Sample Design
H1 Sample design
What sample design will be used, eg census, stratified simple random sample? (H1)
Note. Should include the sample selection strategy, and, if the sample design is multi-stage or multi-phase (or both), the sample selection strategy used in each stage/phase.
If a census, go to H4
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H2 Sample stratification
What stratification has been used in the sample design? (H2)
Note. Should include: stratification variables; stratification boundaries (noting any strata which are completely enumerated); reasons stratification strategy adopted; and, if multi-stage/phase sampling is being used, report stratification for each stage/phase.
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H3 Sample allocation
How has the sample been allocated to strata? (H3)
Note. Should include: allocation formulae (if used), and from where data referenced by formulae obtained; minimum and maximum stratum sample size constraints; reasons why the allocation strategy was adopted; and, if multi-stage or multi-phase sampling is being used, report for each stage/phase.
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H4 Sample size
What is the expected total number of businesses you will attempt to contact (ie total sample size initially drawn)? How has this been set? (H4)
Note. Should include: total number of businesses that the agency will attempt to contact including expected non-responding businesses; any constraints which have been imposed (eg RSEs, Confidence Intervals, cost); if multi-stage/phase sampling is being used, should report for each stage/phase; if the survey is a census, then the total sample size should be the same as the total number of units on the frame reported in G4; and, if quota sampling is used, should indicate the number of businesses the agency will attempt to contact.
In order to complete 200 interviews we require a sample of 265 facilities, based on the 2003 response rate of 75%. The majority of the sample will be businesses for SCH purposes. A response rate of 75% was achieved in 2003.
The initial sample will be randomly drawn from a register of active residential aged care facilities.
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H5 Expected live and in scope units
Of the total number of businesses reported in H4, how many businesses are expected to be live and in scope? (H5)
Note. Should include how these estimates were determined (response should take into consideration frame issues reported in G6) and, if the sample is multi-phase, should include these quantities for each phase. Should exclude: businesses expected to be defunct (ie no longer in business); expected non businesses (eg private individual); businesses contacted that are expected to not fall into the scope of the survey for some other reason (eg a retail business in a manufacturing survey); if quota sampling is used, businesses expected to be contacted but not required (eg where quotas have already been filled).
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H6 Response rate
Of the number of businesses reported in H5, how many businesses are expected to respond (ie the responding sample size)? (H6)
Note. Should include: how these estimates were determined; target relative standard error (RSE) levels on selected data output items (if any) and reasons for choice; if the sample is multi-phase, should indicate these quantities for each phase; and, if quota sampling is used, should indicate the size of the desired sample (this should be a subset of H5).
As described in question 12, we are expecting to interview 200 residential aged care facilities, of which approximately 180 will be non-government businesses.
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H7 Representativeness of respondents
What evidence is there that the expected respondents will be representative of non-respondents? (H7)
Note. This item addresses the concern that expected survey non-response may bias the survey results. The effect of non-response bias on survey results is lowest when the response rate is high, or when respondents are representative of non-respondents.
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If a census, go to I1
H8 Allowances for non-response
What allowances have been made for expected non-response and frame deficiencies in the sample design? (H8)
Note. Should include allowances made for: refusals, non-contacts, expected defunct units (ie units no longer in business), and expected out of scope units.
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H9 Respondent burden across surveys
What consideration has been given to ensuring respondent burden is spread evenly by controlling sample selection across surveys, or (for repeating surveys) over survey cycles? (H9)
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