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Table 4 Median Age at Menarche by Demographics

From: Puberty timing associated with obesity and central obesity in Chinese Han girls

  Menarche P value
Median Age (95% CI)
Overall 12.36(12.27,12.45)
Place
 Urban 12.17(12.04,12.30)  
 Rural 12.52(12.40,12.65) < 0.001
WHtR
 < 0.5 12.47(12.38,12.57)  
 ≥ 0.5 11.70(11.43,11.97) < 0.001
WC
 < 90th 12.44(12.35,12.54)  
 ≥ 90th 11.48(11.04,11.93) < 0.001
BMI
 Normal weight 12.51(12.42,12.61)  
 Overweight 11.75(11.50,12.00) < 0.001a
 Obese 11.44(11.04,11.84) < 0.001b
   0.175c
  1. Abbreviations: BMI Body mass index, CI confidence interval, WHtR Waist to height ratio, WC Waist circumference
  2. a P value of comparison between overweight and normal weight
  3. b P value of comparison between obesity and normal weight
  4. c P value of comparison between overweight and obesity