Table 2.
Effectiveness of video self-instruction (intervention group) and instructor-led (control group) on CPR knowledge level across time points (pretest, posttest, 1 month, 3 month, and 6 month), adjusted with covariates.
| Variables | Adjusted coefficient | Standard error | Adjusted odds ratio | 95% Cl for odds ratio | P -value | |
|---|---|---|---|---|---|---|
| Lower bound | Upper bound | |||||
| Intercept | −0.180 | 0.341 | ||||
| Group | ||||||
| Control | Ref | |||||
| Intervention | 0.725 | 0.378 | 2.065 | 0.985 | 4.328 | 0.055 |
| Time point | ||||||
| Pretest (Baseline) | Ref | |||||
| Posttest | 4.393 | 0.774 | 80.885 | 17.735 | 368.891 | <0.001* |
| 1 month | 1.981 | 0.372 | 7.252 | 3.497 | 15.039 | <0.001* |
| 3 months | 1.171 | 0.358 | 3.227 | 1.600 | 6.505 | 0.001* |
| 6 months | −0.657 | 0.394 | 0.518 | 0.239 | 1.122 | 0.095 |
| Interaction | ||||||
| Control * pretest (baseline) | Ref | |||||
| Intervention * posttest | −0.904 | 1.030 | 0.405 | 0.054 | 3.050 | 0.380 |
| Intervention * 1 month | 0.217 | 0.568 | 1.243 | 0.408 | 3.783 | 0.702 |
| Intervention * 3 month | −0.594 | 0.505 | 0.552 | 0.205 | 1.485 | 0.239 |
| Intervention * 6 month | 0.134 | 0.525 | 1.143 | 0.409 | 3.198 | 0.798 |
*
Variable with p < 0.05.
SE, standard error; CI, Confidence interval; Ref, Reference category.
QIC = 783.439, QICC = 778.062, knowledge model adjusted with covariates: gender, age (years) group, professional status, years of experience group, duration of CPR training and survival outcome.