Table 5.
Comparison of back pain between patients with and without more than 20° kyphosis
| Patients | Denis P1 | Denis P2 | Denis P3 |
|---|---|---|---|
| With >20° kyphosis | 40 | 22 | 1 |
| Without >20° kyphosis | 1 | 2 | 2 |
| Total | 41 | 24 | 3 |
χ2 test, χ2= 16.98, ν= 2, P < 0.01.
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