Contact InformationBack
| Date of survey | : | 9-21 September 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 | : | 1,016 successful cases | |
| Effective Response rate | : | 76.9% | |
| Std. sampling error | : | Less than 1.6% |
| Table 1 Breakdown of contact information of the survey |
|
Frequency |
Percentage |
Respondents' ineligibility confirmed |
6,298 |
38.2% |
Fax/ data line |
416 |
2.5% |
Invalid number |
4,127 |
25.0% |
Call-forwarding/ mobile/ pager number |
116 |
0.7% |
Non-residential number |
457 |
2.8% |
Special technological difficulties |
29 |
0.2% |
No eligible respondents |
1,153 |
7.0% |
|
|
|
Respondents' eligibility not confirmed |
3,839 |
23.3% |
Line busy |
221 |
1.3% |
No answer |
2,720 |
16.5% |
Answering device |
104 |
0.6% |
Call-blocking |
45 |
0.3% |
Language problem |
184 |
1.1% |
Interview terminated before the screening question |
552 |
3.3% |
Others |
13 |
0.1% |
|
|
|
Respondents' eligibility confirmed, but failed to complete the interview |
5,340 |
32.4% |
Household-level refusal |
10 |
0.1% |
Known respondent refusal |
14 |
0.1% |
Appointment date beyond the end of the fieldwork period |
5,271 |
32.0% |
Partial interview |
17 |
0.1% |
Miscellaneous |
28 |
0.2% |
|
|
|
Successful cases |
1,016 |
6.2% |
|
|
|
Total |
16,493 |
100.0% |
| Table 2 Calculation of effective response rate |
|
