In the second sensitivity analysis, defining marked variability with a minimum duration of 2 minutes instead of 1 minute in the main analysis (Table S2 ), the estimation of the adjusted relative risk was close to the main analysis but did not reach statistical significance (aRR 1.53, 95% CI 0.81–2.88). 4.
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Association between marked fetal heart rate variability and neonatal acidosis: A prospective cohort study.
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