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Table 3 Univariate analysis of the association of Bacteroidetes and Firmicutes with BMI levels by gender

From: Correlation of intestinal microbiota with overweight and obesity in Kazakh school children

Variables Total Normal group Overweight group Obesity group P-values
Total (n = 175) (n = 91) (n = 62) (n = 22)  
Bacteroidetes × 107copies/μL 1.31 ± 1.94 1.5 ± 2.2 1.37 ± 1.77 0.33 ± 0.47 0.002*
Firmicutes × 107copies/μL 2.58 ± 4.52 2.43 ± 4.53 2.05 ± 3.01 4.7 ± 7.01 0.628
Bact/Firm 0.98 ± 0.71 1.06 ± 0.62 1.03 ± 0.82 0.48 ± 0.52†‡ <0.001*
Boy (n = 87) (n = 45) (n = 30) (n = 12)  
Bacteroidetes × 107copies/μL 1.02 ± 1.53 1.00 ± 1.42a 1.30 ± 1.86 0.41 ± 0.56 0.218
Firmicutes × 107copies/μL 1.99 ± 3.38 1.71 ± 3.32a 1.57 ± 2.04 4.12 ± 5.36 0.170
Bact/Firm 1.06 ± 0.81 1.15 ± 0.72 1.12 ± 0.97 0.59 ± 0.59 0.066
Girl (n = 88) (n = 46) (n = 32) (n = 10)  
Bacteroidetes × 107copies/μL 1.59 ± 2.26 1.99 ± 2.69 1.43 ± 1.70 0.23 ± 0.32†‡ 0.002*
Firmicutes × 107copies/μL 3.17 ± 5.37 3.14 ± 5.41 2.50 ± 3.68 5.39 ± 8.87 0.725
Bact/Firm 0.90 ± 0.58 0.98 ± 0.51 0.94 ± 0.66 0.36 ± 0.43†‡ 0.003*
  1. Data were presented as mean ± SD; Differences among three groups were compared using Kruskal-Wallis test and between two groups were compared using the Mann–Whitney U test because data were not normally distributed.
  2. *P < 0.05, indicated significant differences among three groups.
  3. †,‡P < 0.0167, indicated significant differences as compared with the normal and overweight groups.
  4. aP < 0.05, indicated significant differences between boys and girls in normal group. No significant difference between boys and girls were found either in overweight group or in obesity group.