Compensated imbalance patient: PI of 62° and a LL of 50°, showing an alteration between the relationship of these (62–50° = 12°) with a slightly altered TPA of 18°, but with an SVA within normal limits (43 mm), at the expense of compensatory mechanisms such as pelvic retroversion (PT = 21°) and verticalization of the sacrum (SS = 41°). Patients with a high PI have a great capacity for pelvic compensation (62° = 21° + 41°), which will allow you to increase PT even more.Note. PI, pelvic incidence; LL, lumbar lordosis; TPA, T1-pelvic angle; SVA, sacral vertical axis; PT, pelvic tilt; SS, sacral slope.