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Table 3 Comparisons between patients with solid fusion and not solid fusion

From: Surgical outcomes after instrumented lumbar surgery in patients of eighty years of age and older

  Solid fusion N = 53 Not solid fusion N = 19 P value
Sex (M:F) 21:32 7:12 0.831
OP age (years) 82.5 ± 2.5 82.3 ± 3.0 0.786
BMI 25.0 ± 3.5 26.1 ± 2.6 0.189
Pre-op VAS (back) 6.3 ± 2.7 6.2 ± 2.3 0.938
Final VAS (back) 2.5 ± 2.5 2.0 ± 2.0 0.356
Pre-op VAS (leg) 5.5 ± 3.1 4.4 ± 2.9 0.188
Final VAS (leg) 2.0 ± 2.7 1.7 ± 2.2 0.705
Pre-op ODI 62.5 ± 9.0 59.7 ± 8.9 0.554
Final ODI 30.0 ± 12.4 29.8 ± 10.9 0.979
ODI difference (final - pre-op) 32.6 ± 13.1 29.9 ± 11.2 0.689
ODI improvement (%) 0.5 ± 0.4 0.5 ± 0.3 0.612
Primary : secondary surgery 46:7 17:2 0.762
Complication (yes : no) 7:46 1:18 0.344
Instrumented segment 2.0 ± 0.94 3.0 ± 1.8 0.003
Op time (minutes) 194.4 ± 51.0 211.9 ± 60.7 0.226
Blood loss (ml) 714.3 ± 530.9 1012.1 ± 804.2 0.074
CCI 1.6 ± 1.6 2.3 ± 2.2 0.127
  1. M male, F female, Op operation, BMI body mass index, VAS visual analog scale, ODI oswestry disability index, CCI the Charlson comorbidity index