Table 8.
Odds ratios of physical fitness / physique index at 10/11 years of age for OSI/ bone metabolism at 14/15 years of age (girls, N = 152).
| Tertile value (n) | OSI | BAP | NTX | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | p | OR | 95% CI | p | OR | 95% CI | p | |||
| 10/11-year-olds | Height (cm) | 127.9–141.9 (54) | – | – | – | – | – | – | – | – | – |
| 142.1–147.4 (49) | 10.349 | [2.761–38.792] | 0.001 | 0.973 | [0.947–1.000] | 0.047 | 0.962 | [0.933–0.992] | 0.014 | ||
| 147.5–163.3 (49) | 9.789 | [2.616–36.629] | 0.001 | 0.944 | [0.913–0.975] | 0.001 | 0.945 | [0.912–0.979] | 0.002 | ||
| % fat (%) | 8.6–16.5 (51) | – | – | – | – | – | – | – | – | – | |
| 16.6–20.5 (50) | 0.904 | [0.312–2.623] | 0.853 | 0.974 | [0.949–1.001] | 0.056 | 0.965 | [0.936–0.995] | 0.021 | ||
| 20.6–47.5 (51) | 1.099 | [0.387–3.120] | 0.859 | 0.953 | [0.924–0.983] | 0.002 | 0.961 | [0.931–0.991] | 0.013 | ||
| % muscle (%) | 18.55–26.20 (50) | – | – | – | – | – | – | – | – | – | |
| 26.30–29.35 (48) | 8.010 | [1.980–32.410] | 0.004 | 0.956 | [0.926–0.986] | 0.004 | 0.944 | [0.912–0.978] | 0.001 | ||
| 29.50–39.10 (54) | 19.066 | [4.666–77.911] | 0.000 | 0.948 | [0.918–0.979] | 0.001 | 0.934 | [0.901–0.969] | 0.000 | ||
| Grip strength (kg) | 9.8–15.8 (51) | – | – | – | – | – | – | – | – | – | |
| 16.0–19.0 (53) | 3.542 | [1.079–11.628] | 0.037 | 0.987 | [0.963–1.011] | 0.286 | 0.971 | [0.943–0.999] | 0.040 | ||
| 19.3–25.0 (48) | 5.541 | [1.652–18.592] | 0.006 | 0.952 | [0.922–0.983] | 0.003 | 0.931 | [0.895–0.969] | 0.000 | ||
Logistic regression analysis.
The 10/11-year-olds were fifth-grade elementary school students, whereas the 14/15-year-olds were third-year junior high school students.
OR, odds ratio; p, probability value; % fat, body fat ratio; % muscle, body muscle ratio; OSI, osteo-sono assessment index; BAP, bone specific alkaline phosphatase; NTX, type I collagen cross-linked N-telopeptide.