Table 4.
Comparison of the survey results of the theory of planned behavior scale before and after intervention in the web-based intervention group.
| Factor | Before, mean (SD) | After, mean (SD) | t test (df) | P value | Improved, mean (SD) | 95% CI |
| Attitude | 17.36 (2.338) | 18.19 (2.234) | 4.770 (278) | <.001 | 0.84 (2.292) | 0.49-1.18 |
| Subjective behavioral norms | 14.9 (2.898) | 16.22 (2.974) | 5.940 (278) | <.001 | 1.32 (2.91) | 0.88-1.76 |
| Perceived behavioral control | 51.82 (5.772) | 54.44 (6.165) | 5.858 (278) | <.001 | 2.62 (5.848) | 1.74-3.50 |
| Blood donation willingness | 20.79 (3.114) | 22.04 (3.168) | 5.697 (278) | <.001 | 1.25 (2.859) | 0.81-1.68 |
| Outcome expectations | 12.99 (1.71) | 13.66 (1.535) | 5.732 (278) | <.001 | 0.66 (1.507) | 0.43-0.89 |
| Self-identity | 16.2 (3.274) | 17.55 (6.138) | 2.755 (278) | .007 | 1.35 (6.348) | 0.38-2.31 |
| Blood donation anxiety | 12.46 (1.941) | 13.27 (1.802) | 6.234 (278) | <.001 | 0.82 (1.717) | 0.56-1.08 |
| Cognition of the blood donation environment | 27.25 (4.464) | 29.82 (4.138) | 9.128 (278) | <.001 | 2.57 (3.686) | 2.02-3.13 |
| Previous blood donation experience | 10.82 (2.646) | 11.25 (2.855) | 2.613 (278) | .01 | 0.22 (2.745) | 0.2-0.63 |
| Total | 184.56 (21.124) | 196.19 (21.986) | 8.931 (278) | <.001 | 11.64 (17.039) | 9.07-14.21 |