. Author manuscript; available in PMC: 2020 Nov 1.

Published in final edited form as: Spine Deform. 2019 Nov;7(6):890–898.e4. doi: 10.1016/j.jspd.2019.01.011

Table 3.

Patient Characteristics and Risk Classification^*

		Low Risk	High Risk
	SMS	Cobb Angle
Single Thoracic, Double Major, Double or Triple Thoracic curves	1-2	≤15	16+
	3	≤25	26+
	4+	≤33	34+

Single Lumbar/Thoracolumbar curve	1-2	≤21	22+
	3	≤30	31+
	4+	≤39	40+

SMS, skeletal maturity stage

Low Risk defined as predicted probability of a poor prognosis of <0.31; high risk as ≥0.31