| N | Mean | Std. deviation | 95th |
---|---|---|---|---|
Total | 1037 | 1.29 | 1.11 | 3.0 |
Sex | Â | Â | Â | Â |
  Male | 442 | 1.21 | 0.93 | 3.1 |
  Female | 595 | 1.34 | 0.83 | 2.9 |
Age(years) | Â | Â | Â | Â |
  6-9 | 278 | 0.81 | 0.57 | 2.1 |
  ≥10 | 759 | 1.46 | 0.90 | 3.2 |
      10-15 | 622 | 1.47 | 0.93 | 3.2 |
      ≥16 | 137 | 1.45 | 0.76 | 3.2 |
Tanner stage | Â | Â | Â | Â |
  I | 384 | 0.93 | 0.72 | 2.6 |
  ≥II | 643 | 1.51 | 0.89 | 3.2 |
      II-IV | 518 | 1.54 | 0.93 | 3.3 |
      V | 125 | 1.37 | 0.66 | 2.7 |