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Table 3 Temporal differences of measured variables ipsilateral to VS side, between and within groups (two-way mixed-design ANOVA, post hoc comparisons, SPSS Sidak adjusted p values)

From: Association of transcranial Doppler blood flow velocity slow waves with delayed cerebral ischemia in patients suffering from subarachnoid hemorrhage: a retrospective study

Variables

Time of measurement

DCI

(N = 19)

Non-DCI

(N = 13)

p value

CBFV (cm/s)

Pre VS

90.9 ± 25.5

85.9 ± 22.4

0.93

 

During VS

150.8 ± 33.2

167.9 ± 33.7

0.9

 

p value

 < 0.001

 < 0.001

 

CBFV SWs

[cm/s]

Pre VS

3.20 ± 1.02

2.25 ± 1.08

 < 0.001

 

During VS

3.95 ± 1.45

4.64 ± 1.43

0.91

 

p value

0.84

 < 0.001

 

Tau (s)

Pre VS

0.31 ± 0.20

0.20 ± 0.09

0.9

 

During VS

0.18 ± 0.09

0.17 ± 0.10

0.97

 

p value

0.71

0.93

 

Mxa

Pre VS

0.23 ± 0.23

0.26 ± 0.16

0.95

 

During VS

0.36 ± 0.18

0.26 ± 0.23

0.85

 

p value

0.85

0.93

 

SampEn

Pre VS

2.60 ± 0.90

2.70 ± 0.90

0.9

 

During VS

3.03 ± 1.01

2.90 ± 0.90

0.95

 

p value

0.9

0.95

 
  1. VS vasospasm, DCI delayed cerebral ischemia, tau time constant, CBFV cerebral blood flow velocity, SWs slow waves, Mxa mean autoregulatory velocity index, SampEn sample entropy