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Table 2 Comparison of variations in DXA between the control group and COC users at baseline and after 12 months

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

Variable Non COC COC users Difference(1) P
Initial Final Variation (%) Initial Final Variation (%)
Lumbar BMD (g/cm2) 0.854 0.958 12.16 0.959 0.949 2.07 10.09 0.056
Lumbar BMC (g) 46.37 53.73 16.84 49.82 49.03 1.57 15.27 0.014
Subtotal BMD (g/cm2) 0.879 0.903 5.28 0.874 0.869 0.56 4.72 0.149
Subtotal BMC (g) 1320.18 1538.46 16.04 1407.01 1414.69 1.18 14.86 0.033
Whole body BMD (g/cm2) 1.003 1.042 5.28 0.995 0.992 0.84 4.44 0.149
Whole body BMC (g) 1783.62 2006.98 11.34 1831.42 1849.58 1.22 10.12 0.031
  1. Variation (in %) at the final moment in relation to the initial moment.
  2. Absolute difference between variations(1).
  3. Mann–Whitney test; p < 0.05 indicates significant differences.