Contact InformationBack
| Date of survey | : | 18-31 March 2010 | |
| 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 | : | 76.6% | |
| Std. sampling error | : | Less than 1.6% |
| Table 1 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
10,146 |
44.8% |
Fax/ data line |
829 |
3.7% |
Invalid number |
6,868 |
30.3% |
Call-forwarding/ mobile/ pager number |
119 |
0.5% |
Non-residential number |
782 |
3.5% |
Special technological difficulties |
54 |
0.2% |
No eligible respondents |
1,494 |
6.6% |
|
|
|
Respondents' eligibility not confirmed |
5,435 |
24.0% |
Line busy |
294 |
1.3% |
No answer |
3,997 |
17.6% |
Answering device |
133 |
0.6% |
Call-blocking |
114 |
0.5% |
Language problem |
329 |
1.5% |
Interview terminated before the screening question |
533 |
2.4% |
Others |
35 |
0.2% |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
6,078 |
26.8% |
Household-level refusal |
12 |
0.1% |
Known respondent refusal |
17 |
0.1% |
Appointment date beyond the end of the fieldwork period |
5,900 |
26.0% |
Partial interview |
54 |
0.2% |
Miscellaneous |
95 |
0.4% |
|
|
|
Successful cases |
1,005 |
4.4% |
|
|
|
Total |
22,664 |
100.0% |
| Table 2 Calculation of effective response rate |
|
