26 Phase Coherence Between Cardiovascular Oscillations in Malaria …
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Fig. 26.2 Comparisons of normalised time-averaged wavelet power of the IHF extracted from ECG
recordings. Each curve is obtained as a median over all subjects. a Febrile malaria (FM) compared
with non-malaria (NM). b Non-febrile malaria (NFM) compared with non-malaria (NM). c FM
compared with NFM. Red shading indicates the range between 25th and 75th percentiles in FM,
blue shading indicates the range between 25th, and 75th percentiles in NM, gold shading indicates
the range between 25th, and 75th percentiles in NFM, and brown shading indicates significant
( p<0.05) differences between the FM–NM and NFM–NM comparisons. The lower panel divides
the results into the six characteristic frequency intervals. The upper and lower limits of each box
represent the 75th and 25th percentiles, respectively; the line between these is the median value. *p
< 0.05, **p < 0.001. The FM group is represented in red, NFM in gold, and NM in blue. The FI-II
to FI-VI frequency intervals are specified in Sect. 26.1