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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Obstet Gynecol. 2016 Apr;127(4):674–680. doi: 10.1097/AOG.0000000000001339

Table 4.

Predictive characteristics of different cut-points of venous lactate for the composite neonatal outcome (N=7741)

Venous lactate cut-point (mmol/L) Sensitivity
(95% CI)		 Specificity
(95% CI)		 Positive Predictive Value
(95% CI)		 Negative Predictive Value
(95% CI)		 Positive Likelihood Ratio
(95% CI)		 Negative Likelihood Ratio
(95% CI)
3.4
(‘optimal’ cut-point in cohort)		 75.0
(65.6, 83.0)		 69.7
(68.6, 70.7)		 3.3
(2.6, 4.1)		 99.5
(99.3, 99.7)		 2.5
(2.2, 2.8)		 0.4
(0.3, 0.5)
4.4
(based on arterial cut-point of 4.8 [23])		 53.8
(43.8, 63.7)		 86.3
(85.5, 87.1)		 5.1
(3.9, 6.6)		 99.3
(99.0, 99.5)		 3.9
(3.3, 4.7)		 0.5
(0.4, 0.7)
5.6
(based on arterial cut-point of 6.0 [2])		 36.5
(27.3, 46.6)		 94.8
(94.3, 95.3)		 8.7
(6.2, 11.8)		 99.1
(98.8, 99.3)		 7.0
(5.4, 9.2)		 0.7
(0.6, 0.8)
5.7
(95th percentile in cohort)		 35.6
(26.4, 45.6)		 95.2
(94.7, 95.6)		 9.1
(6.5, 12.3)		 99.1
(98.8, 99.3)		 7.4
(5.6, 9.7)		 0.7
(0.6, 0.8)
8.0
(99th percentile in cohort)		 18.3
(11.4, 27.1)		 99.2
(98.9, 99.4)		 23.2
(11.6, 33.8)		 98.9
(98.6, 99.5)		 22.1
(13.8, 35.6)		 0.8
(0.7, 0.9)