Table 3.

Summary of five cohort studies evaluating the accuracy of a >65% change in PTH (measured pre‐operation to 1–2 h post‐thyroidectomy) for identifying hypocalcaemia.

First author	r 11i	n 1i	Sensitivity	r 00i	n 0i	Specificity	Observed proportion with outcome
Lam	12	12	1.0	24	26	0.92	0.32
Lombardi	15	16	0.94	29	35	0.83	0.31
McLeod	11	12	0.92	19	25	0.76	0.32
Warren, 2002	1	2	0.50	6	8	0.75	0.2
Warren, 2004	3	3	1.0	17	23	0.74	0.12

^r11i, number of true positives; n _1i, number with hypocalcaemia.

^r 00i, number of true negatives; n _0∖i, number without hypocalcaemia.

PTH, parathyroid.