Table 2 Scoliosis in OI with respect to clinical subtypes

Num of spine radiographic follow-ups

0.19

Only once

16

27

64

10

n = 117 (40.3)

Twice

12

12

45

4

n = 73 (25.2)

Three times

7

6

25

5

n = 43 (14.8)

Four times

1

12

19

1

n = 34 (11.7)

More than four times

2

10

9

2

n = 23 (7.9)

Scoliosis severity (the max Cobb angle among all follow-ups)

< 0.001

Non-scoliotic (Cobb < 10°)

26

4

50

5

n = 85 (29.3)

Mild (Cobb 10°–25°)

13

11

74

8

n = 106 (36.5)

Moderate (Cobb 25°–50°)

0

15

22

3

n = 40 (13.8)

Severe (Cobb > 50°)

0

37

16

6

n = 59 (20.3)

Age of first scoliotic radiographs^b

Median age (years)

7.6 ± 4.2

16.1 ± 8.3

11.6 ± 6.6

11.9 ± 6.5

12.7 ± 7.4

Onset age-group^b

< 0.001

EOS (< 10 years)^c

10

13

50

9

n = 82 (28.3)

Before 5

5

4

12

1

n = 22

Before 3

1

1

2

0

n = 4

LOS (≥ 10 years)^d

1

1

13

0

n = 15 (5.2)

Unknown^e

2

49

49

8

n = 108 (37.2)