. Author manuscript; available in PMC: 2022 Sep 1.

Published in final edited form as: Obstet Gynecol. 2021 Sep 1;138(3):409–416. doi: 10.1097/AOG.0000000000004508

Table 5:

Intervention characteristics and improvement of FHR tracing to Category I within 60 minutes by ACOG category II tracing type

	N	Accelerations or moderate variability^*	Absent accelerations and absent/ minimal variability^*	p-value
Any intervention	2,251	1,189/1,919 (62.0)	244/332 (73.5)	<0.001
Oxygen	1,698	911/1,446 (63.0)	194/252 (77.0)	<0.001
IVF bolus	659	366/560 (65.4)	76/99 (77)	0.03
Amnioinfusion	240	108/207 (52.2)	17/33 (52)	0.94

IVF = intravenous fluid

Data are proportion (%)

ACOG category II tracing type in the 30 minutes immediately before the intervention