Table 1. List of potential risk factors in the development of post-surgical hypoparathyroidism (PoSH).

Category of risk factor	Individual variables
Perioperative biochemistry	Serum calcium
	Parathyroid hormone
	Vitamin D
	Magnesium
	Alkaline phosphatase
Surgery related	Parathyroid identification
	In situ preservation of parathyroid glands
	Parathyroid auto-transplantation
	Central neck dissection
	Inadvertent parathyroidectomy
	Surgical volume and duration
	Re-operative surgery
Patient factors	Age at surgery
	Gender
Disease related	Graves’ disease
	Weight of excised specimen
	Retrosternal extension