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Table 1 Mean demographic values of patient population

From: High grade isthmic spondylolisthesis; can reduction always re-align the unbalanced pelvis?

Age 15.61 years (10–18)
Sex 19 F (67,9%), 9 M (32,1%)
Grade III° SL 12 (42,8%)
Grade IV° SL 16 (57,2%)
Posterior instrumentation with PLIF 4 (14,3%)
Posterior instrumentation with TLIF 6 (21,4%)
Only anterior stabilization 1 (3,5%)
Posterior and anterior stabilization 4 (14,3%)
-Anterior L5-S1 screw 2 (7,1%)
-ALIF 1 (3,5%)
-Autologous bone only 1 (3,5%)
Sonly posterior pedicle screw instrumentation 15 (53,5%)
L5-S1 fusion 19
L4-S1 fusion 9