Skip to main content

Table 3 Predictors of consent at baseline and completion of the 3-month follow-up (n = 1246)

From: Effect of prepaid and promised financial incentive on follow-up survey response in cigarette smokers: a randomized controlled trial

  Consented to follow-up Completed follow-up
Predictors Adjusted risk ratio (95% CI) P-value Adjusted risk ratio (95% CI) P-value
Incentive schemes   0.18   0.20
 No incentive Ref   Ref  
 Promised HK$100 0.92 (0.75–1.13) 0.92 1.07 (0.79–1.45) 0.65
 Promised HK$200 1.09 (0.89–1.34) 0.46 1.23 (0.91–1.66) 0.18
 Mixed incentive 1.14 (0.94–1.38) 0.20 1.33 (1.00–1.77) 0.05
Sex     
 Female Ref  
 Male 1.30 (1.08–1.57) <0.01
Age group (years)   0.49   
 15–29 Ref    
 30–39 1.02 (0.75, 1.38) 0.90
 40–49 1.02 (0.77, 1.36) 0.87
 50–59 1.03 (0.78, 1.37) 0.84
 60–65 0.78 (0.53, 1.15) 0.21
 Above 65 1.05 (0.71, 1.55) 0.81
Education level   <0.01   0.08
 Primary or below Ref   Ref  
 Secondary 1.45 (1.14–1.84) <0.01 1.32 (0.98–1.79) 0.07
 Tertiary 1.66 (1.27–2.17) <0.01 1.47 (1.05–2.07) 0.03
Employment status   0.14   
 Employed Ref  
 Others 1.17 (0.93–1.49) 0.17
 Retired 1.27 (0.95–1.68) 0.12
Had children under 16 1.28 (1.07–1.54) <0.01
Place of birth   0.01   <0.01
 Hong Kong Ref   Ref  
 China Mainland 0.80 (0.67–0.95) <0.01 0.74 (0.58–0.93) 0.01
 Other places 0.57 (0.32–1.00) 0.05 0.34 (0.12–1.01) 0.05
Intention to quit   <0.01   0.08
 No intention Ref   Ref  
 Quit after 30 days 1.37 (1.13–1.65) <0.01 1.13 (0.84–1.52) 0.43
 Quit within 30 days 1.31 (1.11–1.54) <0.01 1.30 (1.04–1.62) 0.02
Ever used Ecigs or HTP     
 No Ref  
 Yes 1.07 (0.89–1.28) 0.49
  1. HK$100 = US$12.8; Ecigs or HTP: E-cigarettes or heated tobacco products; Baseline predictors shown in the table had p-value below 0.1 in the univariate analysis. Other variables with p-value 0.1 or higher were not included in the multivariate models
\