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| Date of survey | : | September 28 to October 20, 2012 | |
| Survey method | : | Telephone survey conducted by telephone interviewers | |
| Target population | : | Hong Kong working population aged 18 to 60 who speak Cantonese | |
| Sampling method | : |
Telephone numbers were selected randomly from residential telephone directories and mixed with additional numbers generated by the computer. If more than one eligible subject had been available, the one who had his/her birthday next was selected.
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| Sample size | : | 1,021 successful cases | |
| Effective response rate | : | 77.4% | |
| Std. sampling error | : | At 95% confidence level, the maximum sampling error of all percentages should be no more than +/-3.1 percentage points |
