Table 3.

Combinations of sensitivity and specificity for various cut-off points of the day 1 calcium levels and slope levels (day 1-day of operation)

	Cut-off point
	–0.30	–0.25	–0.24	–0.23	–0.20	–0.15	–0.10
Slope
Sensitivity (%)	55.6	55.6	66.7	88.9	100	100	100
1-Specificity (%)	1.4	4.3	5.8	5.8	7.2	20.3	44.9
Calcium day 1
Cut-off point	1.90	1.92	1.94	1.97	2.00	2.02	2.04
Sensitivity (%)	55.6	66.7	88.9	100	100	100	100
1-Specificity (%)	5.8	8.7	14.5	21.7	27.5	33.3	40.6