Skip to main content
. 2022 Sep 16;17(1):6–16. doi: 10.14444/8357

Table 2.

Preoperative and follow-up radiographic curve behavior of instrumented major curve, noninstrumented compensatory curve, and T5-T12 kyphosis.

Variable Skeletally Immature
(Risser 0 to 2)
Skeletally Mature
(Risser 3 to 5)
P Value
Skeletal maturity at final follow-up
 Risser, median (range) 4 (1–5) 5 (4–5) <0.001
 Risser 0 | 1 | 2 | 3 | 4 | 5 0 | 1 | 1 | 2 | 11 | 1 0 | 0 | 0 | 0| 3 | 14
 PHOS, median (range) 4 (2–5) 5 (4–5) 0.007
 PHOS 1 | 2 | 3 | 4 | 5 0 | 1 | 1 | 8 | 3 0 | 0 | 0 | 1| 11
Instrumented major Cobb, degree, median (range)
 Preoperative 51 (36–69) 49 (40–69) 0.77
 First erect 23.5 (4–36) a 29 (13–46) a 0.27
 2-y follow-up 15 (−16 to 38) a,b 29 (12–42) a 0.008
Percent correction, % degree, median (range)
 First erect 55.5 (31–92) 44 (33–73) 0.37
 Total 69 (28–132) 53 (13–76) 0.008
 Follow-up 15 (−75 to 500) 0 (−61 to 30) 0.09
Successful correction (residual curve degree <35), n (%)
 First erect 16 (100%) 15 (79%) 0.21
 Final follow-up 15 (94%) 15 (79%) 0.58
Noninstrumented thoracolumbar/lumbar curve, degree, median (range)
 Preoperative 32.5 (17–52) 31.5 (9–47) 0.77
 First erect 13 (−6 to 29) a 13 (3–33) a 0.72
 2-y follow-up 13.5 (−17 to 27) a 15 (0–31) a 0.77
Percent correction, % degree, median (range)
 First erect 42.5 (8–119) 57.5 (−22 to 83) 0.18
 Total 51 (−14 to 153) 55.5 (−33 to 100) 0.85
 Follow-up 4 (−183 to 214) 0 (−300 to 100) 0.64
T5-T12 kyphosis, degree, median (range)
 Preoperative 23.5 (12–38) 19 (4–38) 0.51
 First erect 21.5 (10–37) 17 (4–35) 0.10
 2-y follow-up 23.5 (15–41) 20 (1–45) 0.14
Change in T5-T12 kyphosis, degree, median (range)
 First erect −5 (−12 to 9) −5 (−13 to 16) 0.82
 Total 1.5 (−12 to 9) 3 (−18 to 15) 0.61
 Follow-up 4 (−7 to 10) 2.5 (−20 to 19) 0.94

Abbreviation: PHOS, proximal humerus ossification system.

a

Within-group difference compared with preoperative, Bonferroni-corrected P < 0.05.

b

Within-group difference compared with first erect, Bonferroni-corrected P < 0.05.