Table 1. Response rates.
Australia | Canada | Denmark | Norway | Sweden | UK | |
---|---|---|---|---|---|---|
Total number of households with connected telephone numbers approached |
35 730 |
46 672 |
5369 |
8921 |
7411 |
80 210 |
Number of households of unknown eligibilitya |
20 719 |
34 828 |
899 |
1922 |
1901 |
55 979 |
Number of households of known eligibility |
15 011 |
11 844 |
4470 |
6999 |
5510 |
24 231 |
Number of households in which the individual declined to take part either during or after assessment of eligibility |
433 |
1195 |
2337 |
4726 |
3345 |
3468 |
Number of ineligible householdsa |
10 119 |
8571 |
12 |
24 |
19 |
13 234 |
Number of eligible householdsa |
4892 |
3273 |
4458 |
6975 |
5491 |
10 997 |
Proportion of households eligible among those assessed for eligibility (%) |
32.6 |
27.6 |
99.7 |
99.7 |
99.7 |
45.4 |
Completed interviews |
4002 |
2064 |
2000 |
2009 |
2039 |
6965 |
Minimum response rate (%)b |
15.9 |
5.4 |
31.5 |
23.2 |
28.0 |
10.5 |
Estimated response rate (%)c | 47.4 | 38.8 | 31.6 | 23.0 | 27.5 | 40.0 |
A household was eligible if one or more people aged ⩾50 years lived in the household.
The minimum response rate represents the response rate assuming all households that we could not assess for eligibility were eligible, in other words the lowest possible response rate. It is calculated as the number of complete interviews divided by the number of interviews plus the number of incomplete interviews among eligible people (refusals and break-offs plus non-contacts) plus the number of all households of unknown eligibility (equivalent to the American Association for Public Opinion Research response rate formula 1).
The estimated response rate respresents the response rate after adjusting the size of the denominator for the likely proportion of housholds that were eligible. It is calculated by assuming that the proportion eligible among households of unknown eligibility is the same as the proportion of those tested for eligibility who were eligible (equivalent to American Association for Public Opinion Research response rate formula 3).