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Table 2 Comparison of response rates by invitation mode and survey type

From: Comparison of response rates on invitation mode of a web-based survey on influenza vaccine adverse events among healthcare workers: a pilot study

 

Total

Email invitation

Postal invitation

p-value

Number sent

Response ratea

Number sent

Response ratea

Number sent

Response ratea

Email vs postal

Overall

1328

30.2

649

34.8

679

25.8

< 0.001

Length & type

 Short, closed

316

27.9

154

28.6

162

27.2

0.78

 Short, open

330

31.2

162

36.4

168

26.2

0.05

 Long, closed

334

31.4

154

35.1

180

28.3

0.19

 Long, open

348

30.2

179

38.6

169

21.3

< 0.001

  1. aAAPOR response rate2 (number completed + number partial completes/sample size)