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Averaged results of functional tests
| Age (years) | |||
|---|---|---|---|
| 20–35 | 36–50 | 51–75 | |
| Fingertip-to-floor distance (cm) | −1.6 ± 11.7 | 0.3 ± 11.9 | 2.8 ± 12.0 |
| Schober sign (flexion) (cm) | 14.4 ± 1.5 | 14.5 ± 1.2 | 14.0 ± 1.2 |
| Schober sign (extension) (cm) | 8.0 ± 0.9 | 8.2 ± 1.2 | 8.6 ± 0.9 |
| Ott sign (flexion) (cm) | 31.9 ± 2.7 | 31.6 ± 1.5 | 31.2 ± 1.3 |
| Ott sign (extension) (cm) | 27.8 ± 2.9 | 28.1 ± 2.7 | 28.4 ± 1.1 |
