Table 2 Results at weaning and last follow-up control in 381 Boston braced patients

Age at weaning (years)

14.3 (9.6–16.6)

14.9 (11.0–18.9)^a

16.3 (12.4–19.8)^b

Bone age at weaning (years)

13.6 (9–15)

13.9 (11–16)

15.8 (11–18)^b

Bone – Chronological age difference at stop brace treatment (years)

−0.7 (−3.6–2.1)

−1.0 (−4.0–2.0)^c

−0.4 (−3.2–2.5)

Time in brace at weaning (months)

31.9 (6–82)

36.4 (12–71)^d

31.1 (6–113)

Number of patients in brace time subgroups (months) <24 / ≥24 and <36 / ≥36 and <48/≥48

16/7/1/8

16/18/12/13

91/117/56/26

Major curve standing at weaning (°)

35.0 (6–58)

20.6 (1–45)^e

29.3 (6–58)^f

Time to last follow-up after weaning (years)

24.2 (2.7–30.4)

23.1 (15.0–30.7)

23.4 (2.4–32.1)

Major curve standing at last follow-up (°)

34.8 (13–62)

25.1 (9–54)^e

34.0 (7–81)

Major curve difference at last follow-up relative to start bracing (°)

0.5 (−23–21)

−4.7 (−28–23)^a

0.5 (−22–51)

Number (%) operated^g

12 (38)

1 (2)

14 (5)