Contact InformationBack
Date of survey |
: |
17-21 September 2012 |
|
Survey method |
: |
Telephone survey with interviewers |
|
Target population |
: |
Hong Kong working population of age 18 or above |
|
Sampling method |
: |
All data were collected by our interviewers using a Computer Assisted Telephone Interview (CATI) system which allowed real-time data capture and consolidation. To ensure data quality, on top of on-site supervision, voice recording, screen capturing and camera surveillance were used to monitor the interviewers' performance. |
|
Sample size |
: |
504 successful cases |
|
Effective Response rate |
: |
75.9% |
|
Std. sampling error |
: |
Less than 2.2% |
| Table 1 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
3,899 |
32.9 |
Fax/ data line |
306 |
2.6 |
Invalid number |
2,836 |
24.0 |
Call-forwarding/ mobile/ pager number |
53 |
0.4 |
Non-residential number |
191 |
1.6 |
Special technological difficulties |
11 |
0.1 |
No eligible respondents |
502 |
4.2 |
|
|
|
Respondents' eligibility not confirmed |
3,549 |
30.0 |
Line busy |
293 |
2.5 |
No answer |
2,647 |
22.4 |
Answering device |
191 |
1.6 |
Call-blocking |
18 |
0.2 |
Language problem |
114 |
1.0 |
Interview terminated before the screening question |
256 |
2.2 |
Others |
30 |
0.3 |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
3,884 |
32.8 |
Household-level refusal |
3 |
0.0 |
Known respondent refusal |
4 |
0.0 |
Appointment date beyond the end of the fieldwork period |
3844 |
32.5 |
Partial interview |
21 |
0.2 |
Miscellaneous |
12 |
0.1 |
|
|
|
Successful cases |
504 |
4.3 |
|
|
|
Total |
11,836 |
100.0 |
| Table 2 Calculation of effective response rate |
|
