Table 4.
Subcategories in motives for study participation referring to altruism: Connection to common humanity, Connection to Science, and Connection to Community Organizations. Raters who categorized the motives were blinded from all information on the study participants including diagnosis.
| Unaffected controls | Schizophrenia | Statistic a | ||
|---|---|---|---|---|
| Subcategories of altruistic motives: | Frequency (%) | Frequency (%) | χ2 | p-value |
| Common humanity | 2616 (65.4) | 1336 (58.1) | 32.5 | < 0.0001 |
| Connection to Science | 1367 (34.2) | 947 (41.2) | ||
| Community Organizations | 20 (0.50) | 15 (0.65) | ||
a
Pearson χ2 test.
There were statistically significant differences in the distribution of altruistic motives for study participation between unaffected controls (n=4003) and schizophrenia (n=2298). Answers that were not possible to classify and not included in the analysis: Unaffected controls (n=323) and schizophrenia (n=17).