Table 1 Response rates and reasons for non-response
N | % | |
|---|---|---|
Total sample size | 28 299 | |
Undeliverable survey contacts | 1512 | 5.3 |
Address unknown | 49.0 | |
Moved to unknown place | 20.7 | |
Language problems | 18.7 | |
Main residence outside PSU | 11.5 | |
Deceased | 0.1 | |
Target population | 26 787 | |
NONRESPONSE | N | % |
Non-responders | 9146 | |
No-shows, cancellations | 6.0 | |
Withdrawn (child scared to participate) | 5.7 | |
Not interested (healthy child) | 4.2 | |
Refused | 3.5 | |
No time | 3.2 | |
Unable to reach | 2.6 | |
No suitable appointment | 2.0 | |
Child needs continuous medical care | 1.3 | |
Too much effort; intolerable for child | 1.1 | |
Not a place of residence | 0.8 | |
Health problems | 0.5 | |
Other reasons | 2.5 | |
STUDY PARTICIPANTS, RESPONSE | N | % |
Total study population | 17 641 | 66.6 |
Gender | ||
Girls | 8656 | 67 |
Boys | 8985 | 66 |
Age groups (years) | ||
0–2 | 2805 | 65 |
3–6 | 3875 | 66 |
7–10 | 4148 | 70 |
11–13 | 3076 | 69 |
14–17 | 3737 | 63 |
Citizenship | ||
Non-German | 1479 | 51 |
German | 16 162 | 68 |
Region of residence | ||
Western Germany | 11 741 | 65 |
Eastern Germany | 5362 | 70 |
Berlin | 538 | 61 |