Table 3

Assessment of edema by specific gravity of brain tissue

Measurement

Group (n)

Left hemisphere

Right hemisphere

P


SG

C (8)

1.0444 ± 0.0001

1.0443 ± 0.0002

0.24

S (8)

1.0429 ± 0.0009a,b

1.0424 ± 0.0012c,d

0.44

C-Mg (8)

1.0444 ± 0.0002

1.0444 ± 0.0001

0.44

S-Mg (8)

1.0438 ± 0.0007

1.0439 ± 0.0004e

0.24

KW

18.831

24.724

d.f.

3

3

P

< 0.001

<0.0001


Abbreviations: d.f., degrees of freedom; KW, Kruskal–Wallis test statistic; P, approximate χ2 P value; SG, specific gravity. Groups: sham control (C), sham control MgSO4-treated (C-Mg), septic (S) and septic MgSO4-treated (S-Mg). Data are expressed as means ± standard deviation.

Dunn's multiple comparisons test: aseptic versus sham control, P < 0.001; bseptic versus sham control MgSO4-treated, P < 0.01; cseptic versus sham control, P < 0.01; dseptic versus sham control MgSO4-treated, P < 0.001; eseptic MgSO4-treated versus sham control MgSO4-treated, P < 0.05. A Mann–Whitney test was used for within-group comparisons. Two-tailed P values are shown in the last column.

Esen et al. Critical Care 2005 9:R18   doi:10.1186/cc3004

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