Table 4 Inter-observer variation and intra-subject biological variation in the measurement of range of inter-vertebral motion in side-bending and flexion-extension in an asymptomatic pool of 30 male subjects aged 16–40.
From: An objective spinal motion imaging assessment (OSMIA): reliability, accuracy and exposure data
Sidebending | Flexion-extension | |||||
|---|---|---|---|---|---|---|
n* | RMS (°) | SD | n | RMS (°) | SD | |
Inter-observer variation | 86¥ | 1.86 | 1.82 | 13 | 1.94 | 2.00 |
Intra-subject variation (Observer 1) | 43 | 2.75 | 2.77 | - | - | - |
Intra-subject variation (Observer 2) | 43 | 2.91 | 2.92 | - | - | - |