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Table 2 Basic comparison of day and night fetal heart rate (FHR) parameters in normal fetuses at home and in hospital setting

From: Circadian changes and sex-related differences in fetal heart rate parameters

  Home (n = 30) Hospital (n = 24)
Parameters Day recordings Night recordings P value Day recordings Night recordings P value
bFHR (bpm) 136.1 ± 9.2 131.6 ± 7.4 =0.005 142.6 ± 9.3 131.9 ± 8.6 <0.0001
STV (ms) 10.9 ± 2.7 11.8 ± 2.8 0.04 10.5 ± 2.7 11.7 ± 3.1 =0.024
LTV (ms) 58.3 ± 14.1 63.3 ± 14.8 =0.009 56.3 ± 14.2 63.4 ± 16.6 =0.017
Accelerations (numbers) 10.0 [6.5–14.0] 13.0 [9.8–17.0] <0.0001 10.2 [7.0–13.8] 13.5 [9.0–17.0] >0.1
HV (ms) 58.5 [43.3–68.3] 58.5 [51.4–73.5] =0.09 51.7 [37.1–66.7] 67.2 [54.1–72.8] <0.001
RMSSD (ms) 11.0 ± 1.6 10.7 ± 1.6 >0.3 10.7 10.3 >0.5
  1. Data are shown as mean ± SD or median [IQR]
  2. bFHR basal fetal heart rate, STV short term variation, ms milliseconds, LTV long term variation, HV high variation, RMSSD root mean square of successive difference