Table 4. Statistical differences between guests and cohort participants.
Table showing statistical comparisons. Mann-Whitney U-tests were used to compare the opinions of cohort members and guests.Results have not been adjusted for multiple comparisons. There is no indication that failure to answer one question had any impact on the next, so each question has been analysed individually. Cohort groups have been compared using Kruskal Wallis tests. Where the results were significant post-hoc pairwise comparisons were performed using Dunn's test and the Bonferroni correction for multiple tests applied. Significant results are highlighted in yellow and labelled. The number of people who answered each question is also listed. There are many reasons why people may not have answered a particular question including practical factors like arriving late or leaving early, or failing to press a button within the allocated 10 seconds. In addition, some people have been excluded from this analysis, because they did not answer question 1, therefore we cannot allocate them to the categories of ‘cohort member’ or ‘guest’.
| Comparing Cohort members to guests | Comparing Cohort
Groups |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Question | No. Cohort
Members |
No. of
Guests |
Total
(n) |
Mann-
Whitney U |
Significance
(p) |
Notes | Kruskal
Wallis (H) |
Degrees
of freedom |
Significance
(p) |
Post-hoc pairwise
comparisons (Dunn's test adjusted for multiple comparisons) |
| 1.Which
cohort/guest |
||||||||||
| 2. Age of
consent |
129 | 60 | 189 | 3346 | 0.121 | 7.322 | 3 | 0.062 | ||
| 3. Pregnant
Women |
135 | 64 | 199 | 4111 | 0.518 | 12.246 | 3 | 0.007 | ACONF more positive
than LBC (p=0.020) |
|
| 4. Blood spots | 135 | 64 | 199 | 4102 | 0.413 | 11.206 | 3 | 0.011 | ACONF more positive
than Gen Scot (p=0.047) |
|
| 5. Access
health record |
134 | 63 | 197 | 3738 | 0.081 | 4.987 | 3 | 0.173 | ||
| 6. Fitbit | 133 | 62 | 195 | 3888 | 0.427 | 4.697 | 3 | 0.195 | ||
| 7. Trust
researchers |
133 | 64 | 197 | 3349 | 0.008 | Cohort members
more trusting than guests |
4.328 | 3 | 0.228 | |
| 8. Trust
doctors |
135 | 63 | 198 | 3110 | 0.001 | Cohort members
more trusting than guests |
8.823 | 3 | 0.032 | No statistically significant
results |
| 9. Trust
companies |
134 | 61 | 195 | 3499 | 0.095 | 4.049 | 3 | 0.256 | ||
| 10. Brain scan
for research |
128 | 56 | 184 | 3279 | 0.319 | 3.366 | 2 | 186 | ||
| 11. Brain scan
for health info |
128 | 57 | 185 | 3256 | 0.209 | 1.224 | 2 | 0.542 | ||
| 12. Invite
children/ grandchildren |
125 | 56 | 181 | 3460 | 0.825 | 2.322 | 2 | 0.313 | ||
| 13.
Reapproach re: post- mortem brain donation |
121 | 51 | 172 | 2291 | 0.005 | Cohort members
more positive than guests |
0.172 | 2 | 0.917 | |
| 14. Repeat
testing more regularly |
121 | 40 | 161 | 1886 | 0.015 | Cohort members
more positive than guests. |
5.239 | 2 | 0.073 | |
| 15. Change
lifestyle |
125 | 46 | 171 | 2530 | 0.205 | 10.647 | 2 | 0.005 | ACONF more positive
than LBC (p=0.007) |
|
| 16. Take new
drug |
122 | 47 | 169 | 2757 | 0.687 | 1.429 | 2 | 0.489 | ||