Table 1.

Patient Demographic Data

Characteristic	Sample n (%)
Age (years), (M, SD)	11.4±3.9
<8	5 (16%)
8–17	27 (85%)
Sex
Male	19 (59%)
Female	13 (41%)
Race
White	25 (78%)
Asian	4 (13%)
Other	3 (9%)
Hand Involvement
Bilateral	11 (34%)
Unilateral	22 (66%)
Primary Diagnosis
Duplicated thumb	8 (25%)
Hypoplastic or absent thumb	6 (19%)
Syndactyly: simple	6 (19%)
Amniotic band syndrome	5 (16%)
Radial deficiency	2 (6%)
Syndactyly: complex	2 (6%)
Polydactyly	1 (3%)
Ulnar hypoplasia	1 (3%)
Cleft hand	1 (3%)