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Table 2 Comparison of demographic data between respondents by paper or web questionnaire.

From: Parents' attitudes towards hepatitis B vaccination for their children. A survey comparing paper and web questionnaires, Sweden 2005

  No. of subjects No. of paper (%) No. of web (%) OR 95% CI P-value
Parent's age       
≤ 34 697 572 (82) 125 (18)    
≥ 35 532 424 (80) 108 (20) 1.17 0.87–1.57 0.29
No. of children       
≤ 2 906 727 (80) 179 (20)    
≥ 3 323 269 (83) 54 (17) 0.82 0.57 – 1.15 0.23
Parent's education       
≤ High school 637 538 (84) 99 (16)    
> High school 592 458 (77) 134 (23) 1.59 1.18 – 2.14 0.001
Living in       
Urban area 667 543 (81) 124 (19)    
Non-urban area 562 453 (81) 109 (19) 1.05 0.78 – 1.42 0.72
Children born 2002 received all recommended vaccinations       
Yes 1173 951 (81) 222 (19)    
No 56 45 (80) 11 (20) 1.05 0.50 – 2.14 0.89