Table 9

Effect of mode on survey costs (2008 prices, in $AU)

Simultaneous mixed

Sequential mixed

Online


Total costs

AMPCo rental of list

$15,830

$15,830

$15,830

Monetary incentives

$60,000

$60,000

$60,000

Web survey costs

$4,000

$4,000

$4,000

AMPCO handling and postage

$97,157

$72,024

$65,361

Printing of letters, further info, fax sheet, envelopes

$17,981

$18,470

$18,458

Printing of surveys

$21,284

$19,794

$10,995

Data entry

$33,684

$16,630

$6,636

Total

$249,936

$206,748

$181,280

Incremental cost effectiveness ratios (compared to online mode)

Response rate

19.71%

20.69%

12.95%

Estimated number of responses

10,677

11,208

7,015

Change in response rate compared to online

6.76%

7.74%

-

Change in number of responses compared to online

3,662

4,193

-

Change in total cost compared to online

$68,656

$25,468

-

Additional cost per 1% increase in response rate1

$10,156

$3,290

-

Additional cost per additional response2

$18.75

$6.07

-


Notes: 1. Δcost/Δ response rate; 2. Δcost/Δ number of responses

Scott et al. BMC Medical Research Methodology 2011 11:126   doi:10.1186/1471-2288-11-126

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