Table 4.
Number of questions answered
| |
Model 1* |
||
|---|---|---|---|
| |
Mean (S.E) |
p-value |
|
| Incentive group | Control group | Incentive vs control group | |
|
a) Pre-reminder |
6.72 (0.033) |
6.60 (0.038) |
0.015 |
|
b) Total |
6.70 (0.030) |
6.56 (0.032) |
0.001 |
| |
Model 2** |
||
| |
Mean (S.E) |
p-value |
|
| |
Incentive group |
Control group |
Incentive vs control group |
|
a) Pre-reminder |
6.71 (0.032) |
6.60 (0.036) |
0.029 |
| b) Total | 6.70 (0.029) | 6.57 (0.031) | 0.002 |
GLM Univariate Analysis.
* Model 1. Number of questions answered as dependent variable and respondents in the incentive group or controll group (1,0) as fixed factor.
** Model 2. The same as model 1 but with gender, age and education as covariates. Age and education are significant in both the pre-reminder and total models.