Table 1 Patient’s demographics, operative parameters, and etiologies.

From: Predicting postoperative imbalance in adult spinal deformity staged surgery using predictive thresholds

Variable

N (% of total cohort) or Mean ± SD (range)

Gender (F: M)

134:17 (88.7% : 11.3%)

Age (yr)

69.5 ± 8.3 (32–84)

Height (cm)

150.1 ± 7.6 (132.4-172.5)

Body Weight (kg)

51.7 ± 10.1 (33.7–81.8)

BMI (kg/m2)

22.9 ± 3.9 (15.81–37.85)

T-score

-1.5 ± 1.1 (-3.8-2.5)

Etiology

 

Adult degenerative scoliosis

129 (85.4%)

Adult degenerative kyphosis

18 (11.9%)

Adult idiopathic scoliosis

2 (1.3%)

Iatrogenic spinal deformity

2 (1.3%)

PCO/PSF segment

9.8 ± 2.1 (5–15)

LLIF level

3.9 ± 0.6 (2–5)

1st LLIF OP time (min)

132.9 ± 32.2 (64–264)

2nd PCO/PSF OP time (min)

313.5 ± 56.6 (179–485)

Total OP time (min)

446.7 ± 67 (296–749)

stage 1 EBL (ml)

60.3 ± 80 (0-605)

stage 2 EBL (ml)

823.1 ± 493.3 (117–2760)

Total EBL (ml)

884.3 ± 522.7 (178–2880)

  1. The value was listed as mean ± standard deviation.
  2. PCO/PSF posterior column osteotomy/posterior spinal fusion; LLIF lateral lumbar interbody fusion; OP operation, EBL estimated blood loss.
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