Table 3.

Characteristics at baseline and short-term follow-up in 381 Boston-braced patients who attended long-term follow-up and 114 who did not attend

Characteristic	Attended (n = 381)	Did not attend (n = 114)	P
Gender, percentage males	7	9	0.79
Age at start brace treatment	13.2 (1.9)	13.0 (2.2)	0.32
Bone age at brace initiation	12.6 (1.9)	12.4 (2.3)	0.43
Age at menarchea	13.4 (1.2)	13.3 (1.3)	0.34
Age at weaning	15.9 (1.4)	15.6 (1.6)	0.09
Bone age at weaningb	15.3 (1.1)	15.0 (1.7)	0.15
Major curve at brace initiation (°)	33.1 (7.2)	33.0 (7.7)	0.91
Major curve at weaning (°)	28.4 (10.2)	26.6 (10.0)	0.09
Major curve at 1 year (°)c	28.9 (9.7)	27.6 (9.9)	0.18
Major curve at 2 years (°)d	29.4 (9.9)	27.8 (9.6)	0.16
Age at operation (years)e	16.3 (3.5)	16.1 (1.4)	0.88

Mean (SD) and years or degrees are given

^an = 338 and 99

^bn = 202 and 55

^cn = 363 and 109

^dn = 338 and 99

^en = 27 and 6