Contact InformationBack
Date of survey |
: |
26-30 March 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 |
: |
506 successful cases |
|
Effective Response rate |
: |
70.3% |
|
Std. sampling error |
: |
Less than 2.2% |
| Table 1 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
7,804 |
46.8 |
Fax/ data line |
725 |
4.3 |
Invalid number |
6,050 |
36.3 |
Call-forwarding/ mobile/ pager number |
78 |
0.5 |
Non-residential number |
403 |
2.4 |
Special technological difficulties |
12 |
0.1 |
No eligible respondents |
536 |
3.2 |
|
|
|
Respondents' eligibility not confirmed |
4,600 |
27.6 |
Line busy |
346 |
2.1 |
No answer |
3,492 |
20.9 |
Answering device |
196 |
1.2 |
Call-blocking |
62 |
0.4 |
Language problem |
156 |
0.9 |
Interview terminated before the screening question |
344 |
2.1 |
Others |
4 |
0.0 |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
3,769 |
22.6 |
Household-level refusal |
6 |
0.0 |
Known respondent refusal |
3 |
0.0 |
Appointment date beyond the end of the fieldwork period |
3,714 |
22.3 |
Partial interview |
31 |
0.2 |
Miscellaneous |
15 |
0.1 |
|
|
|
Successful cases |
506 |
3.0 |
|
|
|
Total |
16,679 |
100.0 |
| Table 2 Calculation of effective response rate |
|
