| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Ionized calcium | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium isotope | Is a | False | Calcium | Inferred relationship | Some |  | 
| Non-ionized calcium | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium challenge tests | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Calcium measurement in 24 hour excretion in faeces | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Calcium excretion, 2-hour collection, fasting, urine | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Milk alkali syndrome | Causative agent | False | Calcium | Inferred relationship | Some |  | 
| Subacute milk alkali syndrome | Causative agent | False | Calcium | Inferred relationship | Some |  | 
| Chronic milk alkali syndrome | Causative agent | False | Calcium | Inferred relationship | Some |  | 
| Calcium measurement | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Calcium measurement, urine | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Calcium, serum, ionized measurement | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Hypercalcemia associated with chronic dialysis | Causative agent | False | Calcium | Inferred relationship | Some |  | 
| Acute milk alkali syndrome | Causative agent | False | Calcium | Inferred relationship | Some |  | 
| Corrected serum calcium measurement (procedure) | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Serum calcium measurement | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Blood calcium measurement | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| 24 hour urine calcium output measurement | Has measured component | False | Calcium | Inferred relationship | Some |  | 
| Calcium challenge tests | Component | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium profile | Component | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium measurement in 24 hour excretion in faeces | Component | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium excretion, 2-hour collection, fasting, urine | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium measurement | Component | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium measurement, urine | Component | False | Calcium | Inferred relationship | Some |  | 
| Calcium, serum, ionized measurement | Component | False | Calcium | Inferred relationship | Some |  | 
| Corrected serum calcium measurement (procedure) | Component | True | Calcium | Inferred relationship | Some | 3 | 
| Serum calcium measurement | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Blood calcium measurement | Component | True | Calcium | Inferred relationship | Some | 2 | 
| 24 hour urine calcium output measurement | Component | False | Calcium | Inferred relationship | Some |  | 
| Product containing calcium in parenteral dose form (medicinal product form) | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium 667mg gel | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Calcium acetate (substance) | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium lactate (substance) | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium salt preparation | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium gluconate (substance) | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium carbonate (substance) | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium chloride (substance) | Is a | False | Calcium | Inferred relationship | Some |  | 
| Plasma calcium level (procedure) | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Plasma corrected calcium level (procedure) | Component | True | Calcium | Inferred relationship | Some | 3 | 
| Serum ionised calcium measurement | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Serum ionized calcium (pH 7.4) level (procedure) | Component | True | Calcium | Inferred relationship | Some | 3 | 
| Calcium analyte | Is a | False | Calcium | Inferred relationship | Some |  | 
| Medicinal product acting as calcium supplement (product) | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Product containing precisely calcium phosphate 3.3 gram/1 sachet powder for conventional release oral suspension (clinical drug) | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Calcium+ergocalciferol 400units tablet | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Product containing calcium and ergocalciferol (medicinal product) | Has active ingredient | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium, urine, qualitative | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Calculus calcium content measurement | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium+vitamin D 500units tablet | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Fluid sample calcium level (procedure) | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium/creatinine ratio measurement | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium and magnesium product | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Product containing calcium and vitamin D | Has active ingredient | False | Calcium | Inferred relationship | Some | 1 | 
| Product containing calcium and magnesium (medicinal product) | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Urine calcium / creatinine ratio measurement (procedure) | Component | True | Calcium | Inferred relationship | Some | 3 | 
| Product containing calcium and risedronate | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Calcium 500 mg and risedronate sodium 35 mg oral tablet | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Product containing calcium phosphate and colecalciferol (medicinal product) | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Calcium glycinate (substance) | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium carbonate pediatric compound mixture | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Calcium salts | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Product containing calcium phosphate (medicinal product) | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Product containing calcium iodide (medicinal product) | Has active ingredient | False | Calcium | Inferred relationship | Some |  | 
| Total calcium | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calcium electrolyte | Is a | True | Calcium | Inferred relationship | Some |  | 
| Adjusted calcium | Is a | False | Calcium | Inferred relationship | Some |  | 
| Calculation of ionised calcium concentration | Component | True | Calcium | Inferred relationship | Some | 1 | 
| Measurement of calcium in dialysis fluid specimen | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Corrected measurement of calcium (procedure) | Component | True | Calcium | Inferred relationship | Some | 1 | 
| Measurement of fractional excretion of calcium using urine specimen and serum or plasma specimen (procedure) | Component | True | Calcium | Inferred relationship | Some | 3 | 
| Measurement of ionized calcium in blood specimen | Component | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium 500 mg and risedronate sodium 35 mg oral tablet | Has active ingredient | False | Calcium | Inferred relationship | Some | 1 | 
| Calcium 500 mg and risedronate sodium 35 mg oral tablet | Has basis of strength substance (attribute) | False | Calcium | Inferred relationship | Some | 1 | 
| Calcium 500 mg and risedronate sodium 35 mg oral tablet | Has basis of strength substance (attribute) | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium modified diet (regime/therapy) | Direct substance | True | Calcium | Inferred relationship | Some | 1 | 
| Increased calcium diet (regime/therapy) | Direct substance | False | Calcium | Inferred relationship | Some | 3 | 
| Decreased calcium diet (regime/therapy) | Direct substance | False | Calcium | Inferred relationship | Some | 2 | 
| Calcium supplement therapy (regime/therapy) | Direct substance | True | Calcium | Inferred relationship | Some | 1 | 
| Product containing calcium (medicinal product) | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium-containing product in oral dose form | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium 500 mg and risedronate sodium 35 mg oral tablet | Has precise active ingredient | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium- and risedronic acid-containing product in oral dose form | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Product containing calcium and risedronic acid (medicinal product) | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Product containing only calcium (medicinal product) | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Product containing only calcium and risedronic acid (medicinal product) | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Product containing only calcium and ergocalciferol (medicinal product) | Has active ingredient | True | Calcium | Inferred relationship | Some | 2 | 
| Calcium and magnesium only product | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Product containing only calcium and risedronic acid in oral dose form (medicinal product form) | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium only product in oral dose form | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium only product in parenteral dose form | Has active ingredient | True | Calcium | Inferred relationship | Some | 1 | 
| Calcium intake | Process output | False | Calcium | Inferred relationship | Some | 2 | 
| Estimated quantity of intake of calcium in 24 hours | Process output | False | Calcium | Inferred relationship | Some | 6 | 
| Decreased calcium diet (regime/therapy) | Direct substance | True | Calcium | Inferred relationship | Some | 1 | 
| Increased calcium diet (regime/therapy) | Direct substance | True | Calcium | Inferred relationship | Some | 1 | 
| Measured quantity of intake of calcium in 24 hours | Process output | False | Calcium | Inferred relationship | Some | 5 | 
| Estimated required quantity of intake of calcium in 24 hours (observable entity) | Process output | False | Calcium | Inferred relationship | Some | 4 | 
| Calcium intake | Process acts on | True | Calcium | Inferred relationship | Some | 2 | 
| Estimated quantity of intake of calcium in 24 hours | Process acts on | True | Calcium | Inferred relationship | Some | 3 | 
| Measured quantity of intake of calcium in 24 hours | Process acts on | True | Calcium | Inferred relationship | Some | 5 | 
| Estimated required quantity of intake of calcium in 24 hours (observable entity) | Process acts on | True | Calcium | Inferred relationship | Some | 4 |