Table 1.
Comparison of proportions (%) of eligible participants by demographic characteristics and incentive arm (Arm 1: n = 1,304, 49.8%; Arm 2: n = 1,317, 50.2%) and response status (Arm 1: responder n = 281, 21.5%, non-responder 78.5%; Arm 2: responder n = 205, 15.6%, non-responder n = 1,112, 84.4%)
| Overall (n = 2,621) | Arm 1: $2 Upfront Incentive (n = 1,304) |
Arm 2: $10 Contingent Incentive (n = 1,317) |
p value | |
|---|---|---|---|---|
| Age (years) | 0.0002* | |||
| 18–64 | 32.2 | 35.7 | 28.9 | |
| 65+ | 67.8 | 64.3 | 71.2 | |
| Sex | 0.2189* | |||
| Female | 49.8 | 51.0 | 48.6 | |
| Male | 50.2 | 49.0 | 51.4 | |
| Race/ethnicity | 0.6744* | |||
| Non-Hispanic white | 95.1 | 94.9 | 95.3 | |
| Other | 4.9 | 5.1 | 4.7 |
| Responder (n = 281) | Non-Responder (n = 1,023) |
Responder (n = 205) | Non-Responder (n = 1,112) |
||
|---|---|---|---|---|---|
| Age (years) | 0.4938 † | ||||
| 18–64 | 36.3 | 35.5 | 24.9 | 29.6 | |
| 65+ | 63.7 | 64.5 | 75.1 | 70.4 | |
| Sex | 0.6926 † | ||||
| Female | 48.0 | 51.8 | 50.7 | 48.2 | |
| Male | 52.0 | 48.2 | 49.3 | 51.8 | |
| Race/ethnicity | 0.1088 † | ||||
| Non-Hispanic white | 97.2 | 94.3 | 95.6 | 95.2 | |
| Other | 2.9 | 5.7 | 4.4 | 4.8 |
*
p value for comparison of eligible participants by demographic characteristics in Arm 1 and Arm 2 using Chi-square test
†
p value for comparison of responders to non-responders by demographic characteristics stratified by arm using Cochran-Mantel–Haenszel test