Table I.

Patient demographics.

Variable	Data (n = 28)
Age, years, mean (SD); range	13 (3); 9 to 20
Females, %	75
Preoperative clinical status (n = 24 to 27), %
Back or thigh pain	100
Radicular pain	30
Incontinence (anamnestic)	0
Thight hamstrings	75
Phalen-Dickson gait or forward stoop	63
Sensory deficit (numbness, anamnestic)	12
Motor deficit (objective, examination)	15
Abnormal Achilles tendon reflex	23
Preoperative radiological characteristics (n = 26), %
Risser 0 or 1	64
Scoliosis	54
Preoperative supine CT (n = 14), %
Bilateral lysis/bilateral intact pars	86/14
Sacral doming	100
L5 lumbar index < 0.8	100
Laminar defect L5 or S1	86
Slip percentage, n (SD)	46 (12)

SD, standard deviation.