Table 2.
Bone mineral density measurements of adolescent tennis players and nontennis players.
| BMD (g/cm2) | Tennis players (n = 19) | Nontennis Players (n = 19) | Percent difference§ | 95% confidence interval of the difference | ||
|---|---|---|---|---|---|---|
| P | ||||||
| Total body | 1.154 ± 0.07 | 1.137 ± 0.09 | 1.5 | .530 | − 0.037 | 0.070 |
| Lumbar spine | 1.011 ± 0.08 | 1.418 ± 1.96 | 28.7 | .372 | − 1.319 | 0.505 |
| Total hip | 1.025 ± 0.08 | 0.976 ± 0.12 | 4.7 | .140 | − 0.017 | 0.116 |
| Femoral neck | 0.900 ± 0.09* | 0.820 ± 0.12 | 8.9 | .020 | 0.013 | 0.146 |
| Dominant arm | 0.563 ± 0.05 | 0.563 ± 0.05 | 0 | .971 | − 0.033 | 0.032 |
| Nondominant arm | 0.553 ± 0.04 | 0.557 ± 0.05 | 0.7 | .481 | − 0.034 | 0.025 |
Values other than percentages are means and standard deviations.
§Percent difference between tennis and nontennis players.
∗Tennis players significantly higher than controls (α = .05).