- Related to prolonged bed-bound state (e.g. major injury, recovery from significant illness, paralysis)
- Elevations usually mild
- Hypercalcemia = Ca2+> 10.5; Adjust for low albumin by adding .8x(4-albumin) to Ca2+
- Mild hypercalcemia 10.5-12; Moderate 12-14; Severe > 14