Table 2. Educational Attainment Among Individuals With PTSD Recorded Before the Corresponding Educational Milestone Compared With Their Unaffected Full Siblings.
| Variable | No. (%)a | OR (95% CI)b | ||
|---|---|---|---|---|
| Full siblings with PTSD | Full siblings without PTSD | Unadjusted model | Adjusted modelc | |
| Compulsory education | ||||
| No. | 512 | 717 | NA | NA |
| Eligibility to access upper secondary education | 334 (65.2) | 579 (80.8) | 0.38 (0.28-0.51) | 0.40 (0.27-0.60) |
| Post–compulsory education | ||||
| No. | 1264 | 1916 | NA | NA |
| Finishing upper secondary education | 424 (33.5) | 1182 (61.7) | 0.24 (0.20-0.29) | 0.22 (0.17-0.27) |
| No. | 1407 | 2083 | NA | NA |
| Starting a university degree | 250 (17.8) | 516 (24.8) | 0.58 (0.48-0.71) | 0.53 (0.41-0.68) |
| No. | 1306 | 1881 | NA | NA |
| Finishing a university degree | 136 (10.4) | 301 (16.0) | 0.52 (0.40-0.67) | 0.48 (0.35-0.66) |
Abbreviations: NA, not applicable; OR, odds ratio; PTSD, posttraumatic stress disorder.
a
The denominators for the percentages of siblings with PTSD and without PTSD are the total number of exposed and unexposed siblings, respectively, in a corresponding subcohort. For example, in the subcohort for the analysis of finishing compulsory education, of 512 siblings with PTSD, 334 achieved this milestone. Therefore, the percentage among exposed siblings is 65.2% ([334 ÷ 512] × 100%).
b
All statistically significant.
c
Adjusted for sex, year of birth, maternal age at birth, and paternal age at birth.