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Table 1 Marginal distribution of gender and age by allocation to mode of data collection

From: A randomized trial of mailed questionnaires versus telephone interviews: Response patterns in a survey

  Mailed questionnaire Telephone interview
  % N % N
Gender     
Men 50.5 1319 49.0 681
Women 49.5 1292 51.0 708
Age     
20 – 30 26.7 698 25.3 352
31 – 40 25.0 653 25.0 347
41 – 50 24.9 649 25.3 351
51 – 60 23.4 611 24.4 339
Total 100 2611 100 1389