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Table 3 The total and per unit cost of surveys 1, 2 and 3 conducted between 2000–2005.

From: Emerging advantages and drawbacks of telephone surveying in public health research in Ireland and the U.K

  Survey 1 Survey 2 Survey 3
Set-up and database € 3,810 €1,419 € 8,870
Interviewer salaries €27,940 €6,918 €55,707
Phone charges €5,067 €1,794 €1,500
Data entry € 7,620 0 0
Total cost €44, 437 €10,131 €66,077
Unit cost per completed interview €4.48 €6.65 €15.65