Table 2.

Comparison of sagittal spinopelvic alignment (mean ± standard deviation) in the current study with historical data of normal children and adolescents

Parameter	Current study (n=341)	Study of Mac-Thiong et al.a (n=180)	P value
Mean age	12.1±3.3 years	12.0±3.1 years	0.59
Pelvic incidence	49.1±11.0°	48.4±11.2°	0.48
Pelvic tilt	7.7±8.0°	7.2±7.9°	0.52
Sacral slope	41.4±8.2°	41.2±8.5°	0.76
Thoracic kyphosis	44.0±10.9°	43.0±10.4°	0.35
Lumbar lordosis	48.0±11.7°	48.5±12.4°	0.60

^aData from Mac-Thiong et al. (2004) Spine 29:1642–1647