Waves 1–3 retention numbers and rates for adult female non-smokers
| City | Wave 1 sample | Wave 2 recontacts | Wave 3 recontacts |
|---|---|---|---|
| Beijing | 120 | 114 (95.0%) | 110 (91.7%) |
| Shenyang | 136 | 120 (88.2%) | 102 (75.0%) |
| Shanghai | 113 | 105 (92.9%) | 95 (84.1%) |
| Changsha | 119 | 96 (80.7%) | 91 (76.5%) |
| Guangzhou | 134 | 100 (74.6%) | 89 (66.4%) |
| Yinchuan | 132 | 118 (89.4%) | 100 (75.8%) |
| Total | 754 | 653 (86.6%) | 587 (77.9%) |