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Table 4 Relation between US evidence of HIE and Sarnat stages

From: Correlation between increased serum malondialdehyde and spectrum of cranial ultrasonography findings in hypoxic ischemic encephalopathy: could it be used as a predictor of disease severity?

  HIE by US (n = 11) No HIE by US (n = 21)    
Sarnat stage N % N % χ2 df P value¶
Stage I 0 .0% 10 47.6% 5.782 1 0.016
Stage II 4 36.4% 4 19.0%    
Stage III 7 63.6% 7 33.3%    
  1. χ2 chi-squared statistic, df Degree of freedom
  2. Chi-squared test for trend