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Table 3 Assessment of edema by specific gravity of brain tissue

From: Effect of magnesium sulfate administration on blood–brain barrier in a rat model of intraperitoneal sepsis: a randomized controlled experimental study

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  
  1. 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.
  2. 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.