Table 2.
Full sample dispositions consistent with American Association for Public Opinion Research standards for mail surveys of specifically named persons, offering two modes of participation (web & paper) [24, 41]
| AAPOR Code |
N | % | |
|---|---|---|---|
| Returned Questionnaire, Interview (I) | 1.0000 | ||
| Complete (I) | 1.1000 | 24,824 | 27.6 |
| Eligible, Non-Interview (R + NC + O) | 2.0000 | ||
| Refusal and Breakoff (R) | 2.1000 | ||
| Refusal | 2.1100 | 321 | 0.4 |
| Other Person Refusal/Household-level Refusal | 2.1110 | 456 | 0.5 |
| Known-respondent Refusal | 2.1120 | 4012 | 4.5 |
| Read receipt confirmation, Refusal (web) | 2.1122 | 595 | 0.7 |
| Breakoff/Implicit Refusala | 2.1200 | 657 | 0.7 |
| Non-Contact (NC) | 2.2000 | ||
| Respondent unavailable during field period | 2.2500 | 65 | 0.1 |
| Other, non-refusals (O) | 2.3000 | ||
| Deceased respondent including Postal Service category: Deceasedb; c | 2.3100 | ||
| Physically or mentally unable/incompetent | 2.3200 | 873 | 1.0 |
| Language problem | 2.3300 | 68 | 0.1 |
| Someone other than designated respondent completes part/all of questionnaire | 2.3600 | 153 | 0.2 |
| Miscellaneousd | 2.9000 | 166 | 0.2 |
| Unknown eligibility, Non-Interview (UH + UO) | 3.0000 | ||
| Nothing known about respondent or address/Unknown households (UH) | 3.1000 | 57,669 | 64.1 |
| Housing unit, unknown if eligible respondent/Unknown other (UO) | 3.2000 | ||
| Postal Service category: Refused to accepte | 3.2310 | 110 | 0.1 |
| Unknown if person is a HH resident/mail returned undeliveredf | 3.3000 | ||
| Adjusted Gross Sample (Total sample used) | 89,969 | 100 | |
| Not eligible (NE) | 4.0000 | ||
| Out of Sampleg | 4.1000 | 2645 | |
| Other | 4.9000 | 157 | |
| Gross sample | 92,771 | ||
| Response Rate 1 I/((I) + (R + NC + O) + (UH + UO)) | 27.6 |
aCut-off point for this category is less than 70% of questions are answered
bCorresponding Deutsche Post category used is ‘Empfänger soll verstorben sein‘
cDeceased cases will only be classified as part of code 2.31 if person has died after the first contact/during field period. If status occurs prior to first day of the field period, case is treated as part of code 4.90 (ineligible)
dCases of questionnaires sent back without the signed consent form are classified under this category
eCorresponding Deutsche Post category used is ‘Annahme verweigert‘
fCases will only be classified under this category if status was determined after the first contact/during field period. If status occurs prior to first day of the field period, case would be treated as part of code 4.10 (ineligible)
gFor example: if named person no longer lives at the address for which he or she was sampled, it makes the person ineligible and s/he is out of the sample