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Table 1 Physical characteristics of the study population

From: Factors affecting bone maturation in Chinese girls aged 4–8 years with isolated premature thelarche

  Advanced BA group Control group p-value
Number of girls 206 (48.7%) 217 (51.3%) -
Chronological age (years) 7.56 (6.90, 7.95) 7.72 (7.06, 8.04) 0.189
Disease duration (years) 0.50 (0.25, 1.00) 0.33 (0.25, 0.75) 0.029
Age at onset (years) 6.86 (6.12, 7.41) 7.13 (6.37, 7.60) 0.082
Height-for-age (cm) 130.77 ± 6.28 126.76 ± 7.14 < 0.001
Height-for-age SDS 1.16 ± 0.86 0.36 ± 0.88 < 0.001
Height-for-BA SDS -1.45 ± 0.72 -0.79 ± 0.95 < 0.001
Genetic target height SDS -0.48 ± 0.80 -0.64 ± 1.39 0.165
HtBA SDS - THt SDS -0.97 ± 0.80 -0.16 ± 1.42 < 0.001
Weight-for-age (kg) 30.06 ± 5.90 26.58 ± 4.93 < 0.001
Weight-for-age SDS 1.46 ± 1.05 0.64 ± 0.96 < 0.001
BMI 17.45 ± 2.39 16.44 ± 2.06 < 0.001
BMI SDS 1.16 ± 1.10 0.64 ± 1.07 < 0.001
Breast Tanner stage    0.083
 2 137 (32.4%) 161 (38.1%)  
 3 69 (16.3%) 56 (13.2%)  
Birth weight (kg) 3.25 ± 0.40 3.24 ± 0.42 0.762
  1. Categorical variables are presented as number (%, percentage). Continuous variables with normal distribution are presented as the mean ± standard deviation, and variables with non-normal distribution are presented as the median and quartiles
  2. BA Bone age, SDS Standard deviation score, HtBA SDS THt SDS height-for-BA SDS minus genetic target height SDS, BMI Body mass index