Table 1.

Patient demographics.

Variable types	N	Variables	Total (percent total)
Sex	13	Male	6 (46)
		Female	7 (54)
History of cardiac defects	13	Yes	7 (54)
		No	6 (46)
History of cardiac surgery	13	Yes	4 (31)
		No	9 (69)
Cervical vertebral anomaly	13	Yes	1 (8)
		No	12 (92)
History of bracing	13	Yes	6 (46)
		No	7 (54)
Curve type	13	Thoracic	5 (38.5)
		Double major	8 (61.5)
Initial surgery type	13	Definitive posterior fusion	13 (100)
Construct used	13	Pedicle screws	9 (69)
		Hybrid	4 (30.8)