Table 2.
DXA and QCT-FE results for the astronaut cohort
| Astronaut cohort | Pre-flight | Post-flight | |
|---|---|---|---|
| DXA scan time (days) | 95 ± 34 (56–160) | 8 ± 2 (5–11) | |
| Total hip aBMD (g/cm2) | 1.06 ± 0.13 (0.88–1.24) | 1.03 ± 0.13 (0.83–1.20) | |
| Total hip T-score | 0.97 ± 1.04 (−0.48–2.46) | 0.74 ± 1.07 (−0.95–2.11) | |
| QCT scan time (days) | 82 ± 26 (42–123) | 10 ± 2 (6–14) | |
| FNLS (N) | 14279 ± 3673 (10,030–22,072) | 13624 ± 3215 (10,757–20,914) | |
| FNLF (N) | 4037 ± 385 (3488–4590) | 3925 ± 456 (3350–4486) | |
| Total hip aBMD | −0.03 ± 0.02 | Total hip aBMD | −2.73 ± 1.93 |
| Absolute change (g/cm2) | (−0.06–0.001) | Relative change (%) | (−6.39–0.10) |
| Total hip T-score | −0.23 ± 0.15 | Total hip T-score | 15.28 ± 67.12 |
| Absolute change | (−0.46–0.01) | Relative change (%) | (−57.94–140.83) |
| F NLS | −654.25 ± 1239.04 | F NLS | −3.63 ± 6.93 |
| Absolute change (N) | (−2106–1697) | Relative change (%) | (−14.90–16.92) |
| F NLF | −111.50 ± 279.32 | F NLF | −2.74 ± 6.93 |
| Absolute change (N) | (−507–354) | Relative change (%) | (−12.49–8.64) |
All values presented as mean ± SD (range). FNLS and FNLF refer to load capacities for the nonlinear stance and nonlinear fall loading configurations, respectively. Absolute and relative changes are reported as change from pre-flight values