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Table 5 Dynamic CA parameters in stroke and control participants by geographical region

From: Pooling data from different populations: should there be regional differences in cerebral haemodynamics?

Variables Stroke Patients Controls
SP (n = 25) LEI (n = 25) SP (n = 25) LEI (n = 25)
AH UH AH UH
Coherence VLF range 0.65 (0.19) 0.64 (0.14) 0.61 (0.14) 0.59 (0.14) 0.52 (0.16) 0.48 (0.11)
Coherence LF range 0.68 (0.23)# 0.73 (0.19)# 0.68 (0.17)# 0.71 (0.15)# 0.56 (0.18) 0.58 (0.15)
Coherence HF range 0.72 (0.18)# 0.77 (0.10)# 0.69 (0.17)# 0.67 (0.16)# 0.52 (0.21) 0.51 (0.15)
Normalized gain VLF range, % mm Hg− 1 1.26 (0.57) 1.17 (0.66) 0.94 (0.33) 0.91 (0.34) 1.01 (0.39) 1.19 (0.43)
Normalized gain LF range, % mm Hg− 1 1.32 (0.48) 1.22 (0.46) 1.35 (0.44) 1.26 (0.69) 1.45 (0.83) 1.49 (0.78)
Normalized gain HF range, % mm Hg− 1 1.50 (0.74)* 1.36 (0.51) 1.36 (0.54) 1.28 (0.55) 1.35 (0.63) 1.40 (0.58)
Phase VLF range, radians 0.53 (0.42)# 0.78 (0.39)# 0.58 (0.50)# 0.70 (0.49)# 0.88 (0.35) 0.87 (0.41)
Phase LF range, radians 0.30 (0.45) 0.25 (0.38) 0.30 (0.35) 0.31 (0.39) 0.48 (0.19) 0.45 (0.41)
Phase HF range, radians 0.09 (0.29) 0.10 (0.25) 0.11 (0.40)# 0.17 (0.21)# 0.05 (0.21) 0.01 (0.28)
ARI 4.8 (2.3)# 4.9 (2.0)# 5.1 (1.8)# 5.0 (1.1)# 5.9 (1.5) 5.5 (1.2)
  1. Data are presented as mean (SD)
  2. LEI Leicester, UK SP, Sao Paulo, Brazil, AH affected hemisphere, UH unaffected hemisphere, ARI Autoregulatory Index, VLF, LF, HF Very low, low and high frequency ranges, respectively
  3. *p < 0.01, Tukey’s post-hoc test for comparisons between stroke affected and unaffected hemispheres
  4. #p < 0.05, Tukey’s post-hoc test for comparisons between controls and stroke participants