Skip to main content

Table 1 Control and COC user group characteristics at baseline (median, minimum, and maximum values)

From: Low-dose combined oral contraceptive use is associated with lower bone mineral content variation in adolescents over a 1-year period

  Non COC (n = 26) COC Users (n = 35) P
  Median Minimum Maximum Median Minimum Maximum
Age (years) 15.63 14.67 16.08 15.75 11.75 19.50 0.533
Bone age (years) 16.00 14.00 18.00 16.50 14.00 18.00 0.604
Weight (Kg) 51.90 42.60 64.70 52.20 41.00 73.40 0.839
Height (m) 1.64 1.51 1.72 1.59 1.49 1.67 0.101
BMI (Kg/m2) 20.02 16.69 24.03 20.88 16.63 27.82 0.233
Z-score for BMI −0.08 −1.40 0.94 0.26 −1.93 1.94 0.255
BMI (percentile) 47.08 8.07 82.71 60.23 2.66 97.38 0.279
Lumbar BMD (g/cm2) 0.85 0.76 1.12 0.96 0.77 1.09 0.228
Lumbar BMC (g) 46.37 39.90 76.64 49.82 37.70 64.80 0.330
Total body BMD (g/cm2) 1.00 0.86 1.18 1.00 0.85 1.13 0.369
Total body BMC (g) 1783.62 1260.69 2473.26 1831.42 1291.25 2130.32 0.855
Subtotal BMD (g/cm2) 0.88 0.75 1.04 0.87 0.73 0.95 0.503
Subtotal BMC (g) 1320.19 923.07 1860.11 1407.01 945.38 1609.56 0.903
Total body fat (g) 15075.80 9539.10 22160.10 16111.70 8504.00 25681.00 0.976
Lean weight (g) 33051.00 13852.00 40656.80 36735.60 29604.00 47615.70 0.016
Total body fat (%) 30.10 21.10 37.70 29.50 19.60 38.00 0.637
  1. Mann–Whitney test, p < 0.05 indicates significant differences.