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Table 2 Analysis between “satisfied” and “dis-satisfied” patients

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

  Satisfied group N = 43 Dis-satisfied group N = 29 P value
Sex (M:F) 16:27 12:17 0.722
Op age (years) 82.4 ± 2.5 82.6 ± 2.9 0.739
BMI 25.0 ± 3.2 25.9 ± 3.4 0.262
Pre-op VAS (back) 6.1 ± 2.4 6.4 ± 2.8 0.657
Final VAS (back) 1.4 ± 1.6 3.9 ± 2.5 <0.001
Pre-op VAS (leg) 4.9 ± 2.9 5.7 ± 3.3 0.259
Final VAS (leg) 0.8 ± 1.4 3.6 ± 3.0 <0.001
Pre-op ODI 60.6 ± 9.1 63.5 ± 8.7 0.500
Final ODI 15.0 ± 6.0 52.1 ± 9.6 <0.001
ODI difference 45.9 ± 10.3 11.4 ± 7.5 <0.001
Solid fusion (yes : no) 33:10 20:9 0.463
Primary: secondary surgery 38:5 25:4 0.785
Complication (yes : no) 2:41 7:22 0.014
Instrumented segment 2.0 ± 0.9 2.6 ± 1.7 0.053
Op time (minutes) 188.8 ± 45.0 214.1 ± 62.6 0.049
Blood loss (ml) 718.6 ± 572.8 903.1 ± 685.7 0.220
CCI 1.7 ± 1.8 1.8 ± 1.4 0.834
  1. M male, F female, Op operation, BMI body mass index, VAS visual analog scale, ODI oswestry disability index, CCI the Charlson comorbidity index