Web-Based Versus Traditional Paper Questionnaires: A Mixed-Mode Survey With a Nordic Perspective

Lena Hohwü   ¹ , MHSc, PhD Student ;   Heidi Lyshol   ² ;   Mika Gissler   ^{3, 4} , PhD ;   Stefan Hrafn Jonsson   ⁵ , PhD ;   Max Petzold   ⁶ , PhD ;   Carsten Obel   ¹ , PhD

¹ Department of Public Health, Section for General Practice, Aarhus University, Aarhus C, Denmark

² Department of Health Statistics, Norwegian Institute of Public Health, Oslo, Norway

³ THL National Institute for Health and Welfare, Helsinki, Finland

⁴ NHV Nordic School of Public Health, Gothenburg, Sweden

⁵ University of Iceland and The Directorate of Health, Reykjavik, Iceland

⁶ Sahlgrenska Academy, Centre for Applied Biostatistics, University of Gothenburg, Gothenburg, Sweden