Contact InformationBack
| Date of survey | : | 3 - 11 November,2008 | |
| 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 | : | 1,005 successful cases | |
| Effective Response rate | : | 76.8% | |
| Std. sampling error | : | Less than 1.6% |
| Table 1 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
2,457 |
27.3% |
Fax/ data line |
227 |
2.5% |
Invalid number |
1,332 |
14.8% |
Call-forwarding/ mobile/ pager number |
67 |
0.7% |
Non-residential number |
277 |
3.1% |
Special technological difficulties |
21 |
0.2% |
No eligible respondents |
533 |
5.9% |
|
|
|
Respondents' eligibility not confirmed |
2,160 |
24.0% |
Line busy |
112 |
1.2% |
No answer |
1,421 |
15.8% |
Answering device |
30 |
0.3% |
Call-blocking |
19 |
0.2% |
Language problem |
121 |
1.3% |
Interview terminated before the screening question |
394 |
4.4% |
Others |
63 |
0.7% |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
3,365 |
37.4% |
Household-level refusal |
11 |
0.1% |
Known respondent refusal |
5 |
0.1% |
Appointment date beyond the end of the fieldwork period |
3,183 |
35.4% |
Partial interview |
27 |
0.3% |
Miscellaneous |
139 |
1.5% |
|
|
|
Successful cases |
1,005 |
11.2 % |
|
|
|
Total |
8,987 |
100. 0% |
| Table 2 Calculation of effective response rate |
|
