Table 3.
Comparison between the mean scores of adolescents’ knowledge and the theory of planned behavior components
| Variable | Before the intervention (n = 86) |
6 weeks after the intervention (n = 86) |
Mean difference (n = 86) |
P* |
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | ||
| Knowledge | 21.43 ± 7.09 | 34.50 ± 2.12 | 13.06 ± 7.17 | < 0.001 |
| Attitude | 84.18 ± 5.96 | 90.47 ± 4.34 | 6.29 ± 6.71 | < 0.001 |
| Subjective norms | 47.48 ± 5.55 | 51.27 ± 4.87 | 3.79 ± 5.74 | < 0.001 |
| Perceived behavioral control | 31.44 ± 7.35 | 42.16 ± 4.45 | 10.72 ± 6.99 | < 0.001 |
| Intention | 28.66 ± 3.89 | 30.75 ± 3.83 | 2.93 ± 5.08 | < 0.001 |
| Behavior | 20.88 ± 6.73 | 29.54 ± 4.98 | 8.66 ± 6.73 | < 0.001 |
*
Comparison between before and 6 weeks after the intervention, paired t-test
SD: Standard deviation