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| Date of survey | : | 28/9 - 5/10/2001 | |
| Target population | : | Cantonese-speaking population of Hong Kong aged 15 or above | |
| Survey method | : | Standard POP telephone sampling method was used. Telephone numbers were selected randomly from telephone directories, together with additional numbers generated by the computer. If more than one subject had been available, the one who had his/her birthday next was selected. | |
| Weighting method | : | The data reported have been adjusted according to the age and gender distributions of the Hong Kong population as reported in the 2001 Population Census. | |
| Sample size | : | 1,555 successful cases | |
| Response rate | : | 64.2% | |
| Standard sampling error | : | Less than 1.3% |
