Table 1 Subject Characteristics; DXA and QUS parameters
| Â | Florence | Leuven | Lodz | Manchester | Santiago | Szeged | Tartu | All Centres |
|---|---|---|---|---|---|---|---|---|
QUS | N = 398 | N = 328 | N = 369 | N = 337 | N = 336 | N = 348 | N = 261 | N = 2377 |
   BUA (dB/MHz) | 77.05 (17.71) | 82.43 (17.63) | 79.90 (18.28) | 87.62 (17.46) | 84.00 (21.34) | 71.09 (18.92) | 79.30 (17.75) | 80.09 (19.12) |
   SOS (m/s) | 1542.32 (32.97) | 1561.91 (31.66) | 1547.46 (32.66) | 1560.54 (34.51) | 1557.86 (39.74) | 1543.42 (30.09) | 1543.54 (32.94) | 1550.89 (34.53) |
DXA BMD (g/cm 2 ) | - | N = 328 | - | N = 292 | - | - | - | N = 620 |
   Lumbar spine | - | 1.04 (0.17) | - | 1.07 (0.19) | - | - | - | 1.06 (0.18) |
   Femoral neck | - | 0.80 (0.12) | - | 0.82 (0.14) | - | - | - | 0.81 (0.13) |
   Total hip | - | 1.01 (0.14) | - | 1.02 (0.15) | - | - | - | 1.01 (0.14) |