| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Senile osteopenia | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Steroid-induced osteopenia | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Osteopenia | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Osteopenia | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Senile osteopenia | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Steroid-induced osteopenia | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Osteopenia of prematurity | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Osteopenia of prematurity | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Neonatal osteopenia | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 2 | 
| Global developmental delay, osteopenia, ectodermal defect syndrome | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 2 | 
| Eiken syndrome | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 3 | 
| Osteopenia with high fracture risk | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Osteopenia, myopia, hearing loss, intellectual disability, facial dysmorphism syndrome | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 5 | 
| Osteopenia, intellectual disability, sparse hair syndrome | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 4 | 
| Osteopenia caused by drug | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Premenopausal idiopathic osteopenia | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Osteopenia following menopause | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 2 | 
| Osteopenia due to disuse | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Eiken syndrome | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 2 | 
| Osteopenia, myopia, hearing loss, intellectual disability, facial dysmorphism syndrome | Associated morphology | False | Osteopenia | Inferred relationship | Existential restriction modifier | 2 | 
| Osteopenia, intellectual disability, sparse hair syndrome | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 2 | 
| Global developmental delay, osteopenia, ectodermal defect syndrome | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Craniofacial dysplasia osteopenia syndrome | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 3 | 
| Neonatal osteopenia | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 | 
| Neurodevelopmental delay, seizures, ophthalmic anomalies, osteopenia, cerebellar atrophy syndrome | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 3 | 
| Osteopenia following menopause | Associated morphology | True | Osteopenia | Inferred relationship | Existential restriction modifier | 1 |