Table 2.
Twin Correlations for DSM-IV Criteria for Borderline Personality Disordera
| Criterion | Criterion No. | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| 1. Avoidance of abandonment | |||||||||
| MZ twins | 0.21 | 0.20 | 0.19 | 0.20 | 0.15 | 0.16 | 0.19 | 0.12 | 0.18 |
| DZ twins | 0.14 | ||||||||
| 2. Unstable relationships | |||||||||
| MZ twins | 0.23 | 0.23 | 0.17 | 0.23 | 0.22 | 0.25 | 0.14 | 0.20 | |
| DZ twins | 0.14 | 0.17 | |||||||
| 3. Identity disturbance | |||||||||
| MZ twins | 0.24 | 0.17 | 0.22 | 0.23 | 0.26 | 0.13 | 0.19 | ||
| DZ twins | 0.14 | 0.16 | 0.17 | ||||||
| 4. Impulsive self-harm | |||||||||
| MZ twins | 0.44 | 0.24 | 0.12 | 0.18 | 0.14 | 0.15 | |||
| DZ twins | 0.14 | 0.14 | 0.13 | 0.27 | |||||
| 5. Suicidal behavior | |||||||||
| MZ twins | 0.50 | 0.30 | 0.26 | 0.17 | 0.23 | ||||
| DZ twins | 0.14 | 0.20 | 0.18 | 0.21 | 0.42 | ||||
| 6. Affective instability | |||||||||
| MZ twins | 0.32 | 0.22 | 0.15 | 0.23 | |||||
| DZ twins | 0.11 | 0.15 | 0.15 | 0.10 | 0.23 | 0.21 | |||
| 7. Feeling of emptiness | |||||||||
| MZ twins | 0.39 | 0.12 | 0.19 | ||||||
| DZ twins | 0.16 | 0.20 | 0.21 | 0.16 | 0.23 | 0.16 | 0.34 | ||
| 8. Intense anger | |||||||||
| MZ twins | 0.21 | 0.18 | |||||||
| DZ twins | 0.10 | 0.11 | 0.11 | 0.12 | 0.17 | 0.13 | 0.12 | 0.15 | |
| 9. Paranoid ideation | |||||||||
| MZ twins | 0.29 | ||||||||
| DZ twins | 0.14 | 0.16 | 0.15 | 0.14 | 0.23 | 0.19 | 0.16 | 0.16 | 0.25 |
Abbreviations: DZ, dizygotic; MZ, monozygotic.
a
Data represent polychoric correlations based on the full A, C, E Cholesky decomposition (model 1; eTable 2 in the Supplement); see the Statistical Analysis subsection in the Methods section for a full description of the model. MZ twin correlations are in bold.