. 2022 Apr 22;29:101877. doi: 10.1016/j.jcot.2022.101877

Table 3.

Summary of classification.

Proposed by	Classification types	Based on parameter	Shortcomings
Stefl²¹	Fixed Anterior Tilt	Mobility (▲SS)	Spinal alignment was not considered
	Fixed Posterior Tilt
	Kyphotic
	Fused
	Hypermobile
Phan²³	Rigid and balanced	Balanced (PT < 25° & PI-LL<10°)	No classification for stuck sitting and stuck standing
	Flexible and balanced
	Rigid and unbalanced
	Flexible and unbalanced
Luthringer²²	Normal mobility and normal alignment	Mobility (▲SS) Alignment (PI-LL<9°)	No classification for kyphotic and hypermobility
	Normal alignment and stiffness
	Flatback deformity and normal mobility
	Flatback deformity and stiffness
Our Study	Normal mobility and normal alignment	Mobility (▲SS) Alignment (PI-LL±9°) Pelvic Tilt (<13°/>13°)
	Normal mobility and abnormal alignment Dangerous Stiffness
	Pathological Stiffness
	Hypermobile