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Table 2 Sampling procedures and data collection methods in countries participating in the KIDSCREEN study: cooperation, completion, and response rates. Countries are ordered by sampling method and alphabetically by abbreviations.

From: Methods and representativeness of a European survey in children and adolescents: the KIDSCREEN study

  Sampling Data collection Response rate
Country Method ECCa Coop.a Coop. rate Modea V.C.a Qfilla Completion rate  
   N n %   N n % %
Phone & mail          
AT. Austria CATIa 4433 2425 54.7 Mail 2395 1544 64.5 35.3
CH. Switzerland CATI 4349 2423 55.7 Mail 2423 1746 72.1 40.2
DE. Germany CATI 4642 2430 52.3 Mail 2413 1873 77.6 40.6
ES. Spain CATI 4009 2052 51.2 Mail 1956b 924 47.2 24.2
FR. France CATI 4222 2459 58.2 Mail 2382b 1079 45.3 26.4
NL. The Netherlands CATI 866 426 49.2 Mail 1961 1919 97.8 48.1 c
  DIDOCa 2549 1949 76.5      74.8 c
Schools          
EL. Greece Schools 1656 1192 72.0 Schools 1192 1192 100 72.0
HU. Hungary Schools 3622 3560 97.2 Schools 3560 3297 92.6 90.0
IE. Ireland Schools 1534 1265 82.5 Schools 1265 1265 100 82.5
SE. Sweden Schools 3650 3354 91.2 Schools 3354 3354 100 91.2
Other          
UK. United Kingdom CATI 2517 1079 42.8 Mail 1062 468 44.1 18.9
  Schools 2210 1526 69.0 Schools 1526 1526 100 69.0
PL. Poland Schools 2915 2411 82.7 Mail 2378 1715 72.1 59.6
CZ. Czech Republic MPSa 2283 1632 71.5 Households 1632 1632 100 71.5
  1. a ECC: adults with eligible children contacted; Coop.: parents who agreed to participate ; Mode: Mode of administration; VC: valid cases or addresses; Qfill: questionnaires filled in by children or adolescents, and sent back; CATI: computer assisted telephone interview; DIDOC: large data services institute in the Netherlands; MPS: Multistage probability sampling for selecting households; bRefusals were confirmed in Spain (n = 205) and France (n = 5) by phone. c Mean response rate for the NL was 68.0%.