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Table 2 Pre- and postoperative hemoglobin levels

From: Percutaneous, PMMA-augmented, pedicle screw instrumentation of thoracolumbar ankylotic spine fractures

Hemoglobin levels (N=24) Latest pre-op (gr/%) First post-op (gr/%) Hg diff (gr/%) P Test
Mean 12.073 11.057 −1.21 P<0.001 2-sided paired sample t-test
Median 12.525 10.700 −1.030
SD 1.64 1.80 1.19