Table 5.

EFM features discriminative of acidemia in the last 120 minutes prior to delivery^*

	AUC (95% CI)	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)
Always Category II	0.61 (0.56, 0.65)	67.8 (59.6, 75.2)	50.2 (49.1, 51.2)	2.8 (1.9, 2.9)	98.9 (98.5, 99.2)
Ever Category III	0.62 (0.57, 0.66)	69.1 (61.0, 76.4)	50.0 (49.0, 51.2)	2.4 (2.0, 2.9)	98.9 (96.6, 99.2)
Ever moderate variability	0.62 (0.57, 0.66)	73.8 (66.0, 80.7)	44.3 (43.2, 45.4)	2.4 (1.9, 2.8)	98.7 (98.6, 99.3)
Total number of decelerations	0.66 (0.62, 0.71)	68.5 (61.7, 77.0)	58.8 (57.5, 59.6)	2.9 (2.4, 3.5)	99.1 (98.8, 99.3)
Number of decelerations & ever tachycardic	0.67 (0.63, 0.72)	73.2 (63.2, 78.3)	53.9 (53.6, 56.8)	2.8 (2.3, 3.3)	99.1 (98.8, 99.3)
Total deceleration area	0.76 (0.72, 0.80)	73.5 (64.8, 79.8)	67.2 (66.6, 68.6)	4.0 (3.3, 4.8)	99.3 (99.0, 99.5)
Total deceleration area & ever tachycardic	0.77 (0.73, 0.80)	66.0 (57.7, 73.6)	76.2 (75.4, 77.3)	5.0 (4.0, 6.0)	99.2 (98.9, 99.4)
Total deceleration area, ever tachycardic & always moderate variability	0.77 (0.73, 0.81)	71.4 (68.5, 82.8)	68.5 (66.3, 69.4)	4.0 (3.4, 5.0)	99.2 (99.1, 99.5)
Total deceleration area, ever tachycardic & mostly moderate variability	0.77 (0.73, 0.81)	64.6 (56.3, 72.3)	78.5 (77.9, 79.8)	5.3 (4.4, 6.5)	99.2 (98.9, 99.4)
Total deceleration area, ever tachycardic & ever moderate variability	0.77 (0.74, 0.81)	63.4 (61.3, 76.7)	72.6 (71.6, 73.6	4.3 (3.7, 5.4)	99.2 (99.0, 99.4)

^*Prevalence of acidemia 1.7% (n= 149/8580)