|
Total
|
Email invitation
|
Postal invitation
|
p-value
|
---|
Number sent
|
Response ratea
|
Number sent
|
Response ratea
|
Number sent
|
Response ratea
|
Email vs post
|
---|
Overall
|
1328
|
30.2
|
649
|
34.8
|
679
|
25.8
|
< 0.001
|
Age groupb
|
18–34 yrs
|
202
|
17.8
|
101
|
23.8
|
101
|
11.9
|
0.03
|
35–49 yrs
|
504
|
25.4
|
243
|
34.2
|
261
|
17.2
|
< 0.001
|
50–64 yrs
|
475
|
36.4
|
230
|
40.0
|
245
|
33.1
|
0.12
|
≥ 65 yrs
|
131
|
48.1
|
65
|
40.0
|
66
|
56.1
|
0.07
|
p-value (trend)
| |
< 0.001
| |
0.01
| |
< 0.001
| |
Sexc
|
Female
|
1063
|
29.9
|
509
|
36.0
|
554
|
24.4
|
< 0.001
|
Male
|
263
|
31.6
|
138
|
31.2
|
125
|
32.0
|
0.88
|
Age and sexb,c
|
Female 18–49 yrs
|
564
|
23.6
|
268
|
32.1
|
296
|
15.9
|
< 0.001
|
Male 18–49 yrs
|
140
|
22.1
|
74
|
28.4
|
66
|
15.2
|
0.06
|
Female ≥50 yrs
|
489
|
37.8
|
236
|
41.1
|
253
|
34.8
|
0.15
|
Male ≥50 yrs
|
117
|
43.6
|
59
|
35.6
|
58
|
51.7
|
0.08
|
- vs: versus; yrs.: years
- aAAPOR response rate2 (number completed + number partial completes/sample size)
- b16 respondents had no data for age
- c2 respondents had no data for sex