Figure 1 Association of serum H2S level with bone mineral density (BMD). (A) Correlation between serum H2S levels and lumbar BMD. (B) Correlation between serum H2S levels and femoral BMD. (C) Serum H2S levels in osteopenia/osteoporosis patients and control subjects. (D) Representative images of femoral scans from dual-energy X-ray absorptiometry. Pearson correlation analysis was used to determine the correlation between H2S level and lumbar BMD. Pearson correlation analysis was used to determine the correlation between H2S level and femoral BMD. One-way analysis of variance was used to compare serum H2S level in osteopenia/osteoporosis patients and control subjects. Values are expressed as mean±SD. * P<0.05 vs control, # P<0.05 vs osteopenia.