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| Date of survey | : | 8-20 May 2001 | |
| Target population | : | Cantonese speakers in Hong Kong aged 18 or above who possess mobile phones | |
| Survey method | : | Telephone interviews | |
| Sampling method | : | Telephone numbers were selected randomly from residential telephone directories and mixed 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. | |
| Sample size | : | 1,535 successful cases | |
| Response rate | : | 66.4% | |
| Standard sampling error | : | Less than 1.3% |
