Table 2.

Summary of five cohort studies evaluating the accuracy of a >65% change in PTH (measured pre‐operation to 0–20 min post‐thyroidectomy) for identifying hypocalcaemia.

First author	r 11i	n 1i	Sensitivity	r 00i	n 0i	Specificity	Observed proportion with outcome
Lo	11	11	1.0	56	89	0.63	0.11
Lombardi	13	16	0.81	31	35	0.89	0.31
McLeod	9	13	0.69	33	43	0.77	0.23
Warren, 2002	3	4	0.75	10	12	0.83	0.25
Warren, 2004	2	3	0.67	20	23	0.87	0.12

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

^r00i, number of true negatives; n _0i, number without for identifying hypocalcaemia.

PTH, parathyroid.