| Condition | Calcium | Phosphate | Alkaline phosphatase | Parathyroid hormone | Comments |
|---|---|---|---|---|---|
| Osteopenia | unaffected | unaffected | normal | unaffected | decreased bone mass |
| Osteopetrosis | unaffected | unaffected | elevated | unaffected [citation needed] | thick dense bones also known as marble bone |
| Osteomalacia and rickets | decreased | decreased | elevated | elevated | soft bones |
| Osteitis fibrosa cystica | elevated | decreased | elevated | elevated | brown tumors |
| Paget's disease of bone | unaffected | unaffected | variable (depending on stage of disease) | unaffected | abnormal bone architecture |
