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Table 2 Repeated measures ANOVA on differences in heart rate and HRV indices between before and during lighting

From: Suppression of vagal cardiac modulation by blue light in healthy subjects

  Main effect Interaction
Color (DF = 2) Time (DF = 1)a Time × color (DF = 2)
F value P F value P F value P
Heart rate 0.07 0.93 2.83 0.12 1.30 0.30
LF power 0.52 0.60 0.01 0.93 0.58 0.57
HF power 4.62 0.030 42.04 <0.001 6.52 0.010
LF/HF 1.70 0.22 6.52 0.024 0.92 0.42
  1. DF degree of freedom, HF high-frequency component, LF low-frequency component, LF/HF LF-to-HF ratio in power
  2. aEffect of time between before and during lighting