Table 1 Patient characteristics.

From: Association between preoperative proximal thoracic curve flexibility and postoperative spontaneous correction in Lenke type 1 adolescent idiopathic scoliosis: a retrospective study

Age at surgery [Mean ± SD (range)]

15.5 ± 2.6 (12–24)

Gender (female/ male)

52/3

Risser grade

 1

1

 2

3

 3

3

 4

38

 5

10

Curve type

 Lumbar modifier

  A

37

  B

6

  C

12

 Sagittal modifier

  + 

2

  N

42

  − 

11

Surgical procedures

 UIV level

  UEV-1

6

  UEV

24

  UEV + 1

25

 LIV level

  L1 or above

24

  L2 or below

31

 UIV instruments

  PS

44

  Bilateral hooks

3

  Unilateral hook + unilateral PS

8

  1. SD, standard deviation; UIV, upper instrumented vertebra; LIV, lower instrumented vertebra, PS; pedicle screw.
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