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Table 3 Median Age at Tanner Stages for Pubic Hair Development by Demographics

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

  ≥PH2 Median Age (95% CI) P value ≥PH3 Median Age (95% CI) P value ≥PH4 Median Age (95% CI) P value ≥PH5 Median Age (95% CI) P value
Overall 11.62(11.51,11.73) 12.70(12.61,12.80) 14.38(14.28,14.48) 16.92(16.78,17.06)
Place
 Urban 11.53(11.38,11.68)   12.38(12.24,12.53)   13.98(13.84,14.12)   16.61(16.43,16.78)  
 Rural 11.70(11.55,11.85) 0.132 12.97(12.85,13.10) < 0.001 14.71(14.57,14.86) < 0.001 17.25(17.02,17.48) < 0.001
WHtR
 < 0.5 11.68(11.56,11.79)   12.76(12.66,12.86)   14.48(14.38,14.60)   16.98(16.84,17.13)  
 ≥ 0.5 11.25(10.91,11.60) 0.008 12.30(12.00,12.60) 0.001 13.82(13.57,14.08) < 0.001 16.55(16.15,16.94) 0.029
WC
 < 90th 11.68(11.57,11.79)   12.77(12.67,12.87)   14.49(14.38,14.59)   16.98(16.84,17.13)  
 ≥ 90th 9.83(8.37,11.30) < 0.001 11.52(10.84,12.20) < 0.001 13.63(13.31,13.94) < 0.001 16.49(16.05,16.92) 0.028
BMI
 Normal weight 11.76(11.64,11.87)   12.79(12.69,12.90)   14.48(14.37,14.59)   17.01(16.87,17.16)  
 Overweight 11.31(10.96,11.66) 0.021a 12.49(12.16,12.82) 0.086a 13.71(13.37,14.04) < 0.001a 16.03(15.59,16.47) < 0.001a
Obese 10.57(10.00,11.14) < 0.001b 11.93(11.54,12.31) < 0.00b 13.81(13.45,14.18) 0.003b 16.29(15.52,17.06) 0.022b
   0.021c   0.031c   0.631c   0.535c
  1. Abbreviations: BMI Body mass index, CI Confidence interval, PH Pubic hair stage, WHtR Waist to height ratio, WC Waist circumference
  2. aP 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