almost significantp = 0.0770
Frequency domain methods Group-by-time interaction, independent group and independent time did not affect the contributions of HF band, LF band, LF/HF ratio or respiratory rate (RESP), even though the independent group and group-by-time interaction were almost significant in LF/HF ratio ( p = 0.0770; F (2, 22) = 2.888) and RESP ( p = 0.0593; F (12, 119) = 1.778), respectively.