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Table 2 Chi-square tests of newborn weight by maternal BMI in five categories

From: Effect of maternal body mass index on pregnancy outcome and newborn weight

BMI Birth Weight p- value of chi-square test
  2500 ≥ 2500 - 4000 4000 ≤  
20 > 23 105 0 0.001**
  18% 8.3% 0%  
20-24.9 28 370 14 0.001
  6.8% 89.8% 3.4%  
25-29.9 34 311 11 0.372
  9.6% 78.5% 2.9%  
30 - 34.9 9 79 10 0.01**
  9.2% 80.6% 10.2%  
> 35 0 5 1 0.01**
   83.4% 16.6%  
  1. ** p < .01; * p- < .05