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Table 4 Comparison between cases with single-stage operations and those with two-stage operations

From: Surgical outcomes for lumbar spinal canal stenosis with coexisting cervical stenosis (tandem spinal stenosis): a retrospective analysis of 565 cases

  Single-stage Two-stage p
Case, no 11 17  
Sex, female/male, no 4/7 9/8  
Decompression/posterior fusion, no 11/0 12/5  
Period between cervical and lumbar surgery, average, years 0 1.7 ± 1.3 (0.2–5)  
Age, average (range) 66.7 ± 10.2 (48–82) 73.4 ± 10.4 (44–85) NS
YAM, average (range) 97.4 ± 19.6 (69–127) 92.2 ± 16.9 (69–123) NS
Operative time, average (range), min 257.6 ± 134.1 (117–572)* 168.6 ± 74.2 (70–349) 0.0348
Blood loss, average (range), mL 432.3 ± 486.6 (70–1450) 253.8 ± 282.4 (10–1208) NS
Pre lumbar operative L-JOA score, average (range), points 14.0 ± 4.5 (8–21) 12.8 ± 5.9 (−2–22) NS
Pre cervical operative L-JOA score, average (range), points 14.8 ± 7.3 (3–26)  
Postoperative L-JOA score, average (range), points 21.7 ± 4.3 (18–29) 19.0 ± 5.2 (11–28) NS
Recovery rate of L-JOA score, average (range), % 50.9 ± 25.1 (21.4–100) 34.2 ± 39.3 (− 57.1–90.9) NS
Preoperative C-JOA score, average (range), points 10.5 ± 2.6 (7–13) 10.2 ± 2.9 (5–15) NS
Postoperative C-JOA score, average (range), points 12.7 ± 3.1 (7–15.5) 11.7 ± 3.0 (6.5–16) NS
Recovery rate of C-JOA score, average (range), % 40.7 ± 35.8 (0–100) 20.7 ± 16.1 (0–80) NS
  1. Abbreviations: YAM young adult mean, L-JOA Japanese Orthopedic Association for lumbar spinal canal stenosis, C-JOA Japanese Orthopedic Association for cervical myelopathy, NS not significant
  2. *p < .05