year old female presents with a history of feeling tired and listless. There
is no significant past medical history and she is not on any medication. There
is no relevant family history. She works at a call centre and says she is
finding it difficult to cope with her job.
clinical examination there are no abnormalities detected
Sodium 138 mmol/L
Potassium 3.8 mmol/L
Calcium 2.0 mmol/L (corrected)
Phosphate 0.6 mmol/L
Alkaline phosphatase 250 U/L
this patient which one of the following investigations would you arrange in
order to confirm your diagnosis?
Parathyroid hormone levels
Vitamin D levels