. Author manuscript; available in PMC: 2022 Feb 14.

Published in final edited form as: Am J Obstet Gynecol. 2020 Feb 20;223(2):244.e1–244.e12. doi: 10.1016/j.ajog.2020.02.012

Table 3.

Primary Outcome

	% Interpretable Tracing (Interpretable FHR minutes/Total minutes in labor)	p value
Primary Outcome
Percentage of interpretable FHR minutes generated in labor
All Subjects
Fetal ECG	58.0% (28,689/49,480)	0.821
Standard electronic monitoring	58.1% (28,394/48,911)	0.821
Subjects with BMI<30
Fetal ECG	61.1% (13,761/22,506)	< 0.001^a
Standard electronic monitoring	66.5% (14,145/21,265)	< 0.001^a
Subjects with BMI≥ 30
Fetal ECG	55.3% (14,928/26,974)	< 0.001^a
Standard electronic monitoring	51.5% (14,249/27,646)	< 0.001^a

Abbreviations: FHR, Fetal Heart Rate; ECG, electrocardiogram; BMI, body mass index

Significant P values (<0.05)