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

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