|
Testing post-pre difference of approaches |
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| Approach |
Mean (SD) |
Pre* |
Post* |
Post minus Pre |
P-value for difference (paired t-test)** |
|
|
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| 1. Consent for each use |
Mean (SD) |
0.34 (1.95) |
0.14 (2.07) |
-0.21 (2.02) |
0.315 (df = 95***) |
| 2. Assumed consent |
Mean (SD) |
0.44 (1.99) |
0.18 (2.10) |
-0.29 (1.82) |
0.122 (df = 96) |
| 3. Broad Consent |
Mean (SD) |
1.55 (1.64) |
1.21 (1.55) |
-0.32 (1.54) |
0.048 (df = 94) |
|
* 7 Point scale where 3 = strongly like, 0 = neutral, & 3 = strongly dislike ** Bonferroni correction: Alpha = 0.017 (0.05/3) *** df: Degree of freedom; | |||||
Willison et al. BMC Medical Ethics 2008 9:18 doi:10.1186/1472-6939-9-18 |
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