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Table 1 Anthropometric and general characteristics of indigenous and non-indigenous girls in the Araucanía Region, Chile

From: Postmenarche growth: cohort study among indigenous and non-indigenous Chilean adolescents

Characteristics Non-indigenous (n = 126) Indigenous (n = 114) P value
Age at menarche (months)    
\( \overline{x}\pm \mathrm{S}\mathrm{D} \) 146.7 ± 11.3 151.0 ± 10.8 0.003*
Height at menarche (cm)    
\( \overline{x}\pm \mathrm{S}\mathrm{D} \) 152.1 ± 5.7 149.9 ± 4.8 0.002*
Z-score for height/age at menarche    
\( \overline{x}\pm \mathrm{S}\mathrm{D} \) −0.01 ± 1.02 −0.61 ± 0.81 < 0.001*
Weight at menarche (kg)    
\( \overline{x}\pm \mathrm{S}\mathrm{D} \) 49.6 ± 8.8 51.7 ± 9.2 0.073*
Z-score for BMI/age at menarche    
\( \overline{x}\pm \mathrm{S}\mathrm{D} \) 0.95 ± 1.1 1.27 ± 0.98 0.017*
Mother’s schooling (years)    
\( \overline{x}\pm \mathrm{S}\mathrm{D} \) 9.5 ± 2.8 6.6 ± 2.9 0.001 *
Father’s schooling (years)    
\( \overline{x}\pm \mathrm{S}\mathrm{D} \) 9.6 ± 2.8 7.2 ± 2.8 0.001*
Socioeconomic level    
%    
Middle 46.2 8.5  
Middle-low 44.4 41.5 < 0.001**
low 9.4 50.0  
  1. \( \overline{x}\pm \mathrm{S}\mathrm{D} \) = mean ± standard deviation.
  2. *ANOVA test.
  3. **χ2 test.