Study definitions
hypocalcaemia, hypoparathyroidism
HYPOCALCAEMIA, HYPOPARATHYROIDISM
A low level of PTH was defined as a concentration below the reference range for the bioassay used as opposed to normal/high level. Clinically relevant biochemical hypocalcaemia was defined by a total calcium level below 2.00 mmol/l. Temporary hypoparathyroidism was defined by the need for treatment with a vitamin D analogue or oral calcium therapy after surgery to maintain a normal level of blood calcium, which was terminated within 6 months. Permanent hypoparathyroidism was defined by the need for treatment with a vitamin D analogue or oral calcium therapy for more than 6 months.