Table 3 Incentive and likelihood of returning a survey by communication group
Email groupa | Postcard group | |||
|---|---|---|---|---|
Likelihood of returning | Likelihood of returning | |||
AORb | 95% CIc | AORb | 95% CIc | |
Incentive group | ||||
Yes | 1.3 | (1.1, 1.5) | 1.3 | (1.0, 1.6) |
No | Ref | 1 | Ref | 1 |
Sex | ||||
Female | 1.1 | (1.1, 1.2) | 1.2 | (1.1, 1.4) |
Male | Ref | 1 | Ref | 1 |
Age at 9/11 | ||||
< 18 | 1.7 | (1.2, 2.3) | 0.9 | (0.5, 1.5) |
18–24 | 0.8 | (0.7, 1.0) | 0.8 | (0.6, 1.0) |
25–44 | Ref | 1 | Ref | 1 |
45–64 | 1.3 | (1.2, 1.4) | 1.2 | (1.0, 1.3) |
65+ | 1.3 | (0.9, 1.9) | 0.7 | (0.5, 1.1) |
Race | ||||
Non-Hispanic white | Ref | 1 | Ref | 1 |
Non-Hispanic black | 0.8 | (0.8, 0.9) | 0.8 | (0.7, 0.9) |
Hispanic | 0.9 | (0.8, 1.0) | 1.1 | (0.9, 1.3) |
Asian | 0.8 | (0.7, 1.0) | 0.8 | (0.6, 1.1) |
Multi-racial | 0.7 | (0.5, 0.9) | 0.8 | (0.6, 1.3) |
Other | 0.7 | (0.5, 1.1) | 0.7 | (0.4, 1.3) |
Total household Income in 2002, $ | ||||
< 25,000 | Ref | 1 | Ref | 1 |
25,000– < 50,000 | 1.0 | (0.9, 1.2) | 1.0 | (0.8, 1.3) |
50,000– < 75,000 | 1.1 | (0.9, 1.3) | 1.2 | (0.9, 1.4) |
75,000– < 150,000 | 1.0 | (0.9, 1.2) | 1.2 | (0.9, 1.5) |
> =150,000 | 1.0 | (0.8, 1.2) | 1.1 | (0.8, 1.4) |
Education | ||||
High school and below | Ref | 1 | Ref | 1 |
College | 1.0 | (0.9, 1.2) | 1.1 | (0.9, 1.3) |
Post-graduate | 1.1 | (1.0, 1.3) | 1.2 | (1.1, 1.4) |
Reminder call | ||||
Yes | 1.1 | (1.0, 1.2) | 1.6 | (1.4, 1.8) |
No | Ref | 1 | Ref | 1 |
Door to door outreach | ||||
Yes | 0.3 | (0.2, 0.4) | 0.5 | (0.3, 0.6) |
No | Ref | 1 | Ref | 1 |
Number of previous surveys completed | ||||
Three | 6.0 | (5.1, 6.9) | 6.9 | (5.8, 8.3) |
Two | 2.4 | (2.1, 2.7) | 2.5 | (2.1, 3.0) |
One | Ref | 1 | Ref | 1 |