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Table 1 Baseline characteristics in 381 Boston braced patients

From: Early weaning in idiopathic scoliosis

Characteristic A. Unplanned early weaning B. Planned early weaning C. Ordinary bracing
n = 32 n = 59 n = 290
Age at start brace treatment (years) 11.5 (7.7–15.5) 11.4 (7.5–16.0) 13.7 (6.9–17.1)a
Bone age at start brace treatment (years) 10.8 (7–14) 10.4 (5–13) 13.2 (7–16)a
Bone – Chronological age difference at start brace treatment (years) −0.8 (−2.7–0.8) −1.0 (−4.0–2.0)b −0.5 (−3.2–2.1)
Age at menarche (years) 13.6 (11–16) 13.7 (11–16) 13.4 (7–19)
(n = 25) (n = 51) (n = 262)
Major curve standing without brace at start of treatment (°) 34.3 (20–56) 29.8 (21–52)c 33.6 (20–57)
Major curve prone without brace at start of treatment (°) 24.3 (8–41) 19.1 (7–42)d 23.7 (9–45)
Major curve standing in brace (°) at start of treatment 15.7 (4–37) 11.3 (1–37)c 17.4 (1–44)
Major curve flexibility (°) 10.0 (1–22) 10.7 (2–23) 9.9 (−2–24)
Major curve flexibility (%) 29.1 (5–73) 36.1 (7–70)e 29.6 (−5–69)
Major curve redressment (°) 18.7 (1–46) 18.6 (8–33) 16.2 (3–35)f
Major curve redressment (%) 53.7 (4–86) 62.9 (25–97)e 48.9 (7–96)
  1. Values are means (range)
  2. aDifferent from A and B (p < 0.001)
  3. bDifferent from C (p < 0.001)
  4. cDifferent from A (p < 0.005) and C (p < 0.001)
  5. dDifferent from A (p < 0.001) and C (p < 0.001)
  6. eDifferent from A (p < 0.05) and C (p < 0.001)
  7. fDifferent from A (p < 0.05) and B (p < 0.01)
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