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A cross-tabulation showing the frequency of spinal levels identified by palpation and imaging of the intercristal line (SP = spinous process, IS = interspinous space)
| Imaged | ||||||
|---|---|---|---|---|---|---|
| L3 SP | L3–4 IS | L4 SP | L4–5 IS | L5 SP | Total | |
| Palpated | ||||||
| L3 SP | 1 | 0 | 23 | 9 | 3 | 36 |
| L3–4 IS | 0 | 0 | 11 | 8 | 3 | 22 |
| L4 SP | 0 | 0 | 8 | 6 | 3 | 17 |
| L4–5 IS | 0 | 0 | 0 | 0 | 0 | 0 |
| L5 SP | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 1 | 0 | 42 | 23 | 9 | 75 |
