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Table 1 Characteristics of obese subjects and healthy controls

From: Adolescent obesity, joint pain, and hypermobility

Variable Obese (n = 91) Controls (n = 51) p value
Age, years (median) 12.2 14.5 <0.001
 Range 10.2 to 17.6 10.2 to 17.9  
Sex, % male 35.2 37.3 0.80
Race, % black 64.8 64.7 0.99
% Tanner 4 or 5 47.7 70.6 0.055
Physical activity (mean cpm, sd)* 272.8 ± 108.2 255.6 ± 92.3 0.38
BMI (mean) 33.9 ± 4.90 19.70 ± 2.00 <0.001
 Range 26.3 to 49.6 15.1 to 23.2  
BMI-Z- score (mean) 2.38 ± 0.23 - 0.02 ± 0.62 <0.001
 Range 1.93 to 2.88 -1.54 to 0.99  
  1. Statistical analysis for continuous variables was performed using t-tests for normally distributed variables. For categorical variables, the Chi 2 test was used. SD = standard deviation.
  2. Physical activity is in counts per minute (cpm) of physical activity.
  3. *Physical activity data were available on 125 subject (obese = 82, non obese = 43).
  4. Body Mass index (BMI).
  5. BMI-Z-score adjusted for age and gender based on US 2000 CDC growth charts.