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Table 1 The comparison of mean HR when the RA was greater or less than the value 3

From: Nocturnal heart rate variability in 1-year-old infants analyzed by using the Least Square Cosine Spectrum Method

Subject Mean HR when the RA value ≥ 3 (bpm) Mean HR when the RA value < 3 (bpm) P value
A 88.9 ± 5.6 (n = 273) 92.3 ± 9.0 (n = 1079) < 0.001
B 104.4 ± 7.8 (n = 336) 114.4 ± 11.1 (n = 838) < 0.001
C 105.8 ± 6.4 (n = 323) 115.1 ± 6.4 (n = 741) < 0.001
D 89.3 ± 6.2 (n = 275) 94.3 ± 10.7 (n = 722) < 0.001
E 102.6 ± 3.4 (n = 510) 109.1 ± 9.3 (n = 690) < 0.001
F 98.8 ± 7.9 (n = 595) 106.2 ± 9.6 (n = 789) < 0.001
  1. We calculated the HR value when the RA was greater or less than 3. Values are expressed as mean ± SD. The difference of HR was assessed using the t test, and a P value < 0.05 was considered statistically significant. There was statistically significant difference in all subjects (P < 0.001)