Which statement best describes the relationship between inclinometer readings and the angle of maximum kyphosis?

• A. The angle is the sum of inclinometer readings at T1/T2 and T12/L1
• B. The angle is the product of the two inclinometer readings
• C. The angle is measured at a single level
• D. The angle is unrelated to inclinometer readings

Answer: (D)

The key idea is that the maximum kyphosis angle reflects the overall sagittal curvature of the thoracic spine, not a single segment tilt. Inclinometer readings capture how much the spine or body part tilts between two adjacent levels, and they’re used to assess local mobility or gross sagittal alignment. But this local tilt data does not directly give the apex or total arc of kyphosis across multiple levels. Measuring kyphosis accurately typically relies on radiographs (lateral views) and specific angular calculations that account for the curvature over several vertebrae. Because two inclinometer readings don’t map cleanly onto the whole thoracic curve, there isn’t a straightforward relationship between them and the angle of maximum kyphosis.