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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)