Proposed and (Actual) Reference Limits for Men and Women Combined
| Reference range (min)* | Reproducibility (min) | |||
| Parameter | LAO | A-P | LAO | A-P |
| 20–40 y | ||||
| Proposed | 10–60 | 10–60 | ≤30 | ≤30 |
| Mean ± 2 SDs | 0–62 | 0–67 | 0–34 | 0–39 |
| Range | 20–60 | 13–56 | 4–27 | 8–35 |
| 40–60 y | ||||
| Proposed | 10–40 | 10–40 | ≤20 | ≤20 |
| Mean ± 2 SDs | 0–52 | 0–50 | 0–22 | 0–19 |
| Range | 9–44 | 12–42 | 1–18 | 0–18 |
| 60–80 y | ||||
| Proposed | 10–30 | 10–30 | ≤15 | ≤15 |
| Mean ± 2 SDs | 0–30 | 0–28 | 0–22 | 0–15 |
| Range | 9–26 | 15–26 | 2–18 | 0–13 |
↵* Determined from first of 2 studies in each subject.
A-P = anterior–posterior.