Table 1

Waves 1–3 retention numbers and rates for adult male smokers

CityWave 1 sampleWave 2 recontactsWave 3 recontacts
Beijing746674 (90.3%)600 (80.4%)
Shenyang740553 (74.7%)352 (47.6%)
Shanghai765686 (89.7%)596 (77.9%)
Changsha732591 (80.7%)511 (69.8%)
Guangzhou746525 (70.4%)438 (58.7%)
Yinchuan772642 (83.2%)482 (62.4%)
Total45013671 (81.6%)2979 (66.2%)