STUDY DESIGN: A retrospective study. OBJECTIVE: The aim of this study is to introduce a novel regional predictor for sagittal balance in elderly populations and explore its effectiveness of evaluating sagittal balance. SUMMARY OF BACKGROUND DATA: Sagittal balance is getting increasing recognition of importance due to its significant association of health-related quality of life. However, no regional parameters could well reflect and predict the whole sagittal balance. METHODS: Medical records of elderly @entity1 in our outpatient clinic from January 2012 to January 2014 were reviewed with standing full-spine lateral radiograph. Radiological parameters were evaluated, including max @entity1513 (maxTK), @entity1515 ( @entity1515 ), LL minus TK(LL-TK), PI minus LL (PI-LL), sacrum slope (SS), pelvic tilt (PT), pelvic incidence (PI), and SVA (sagittal vertical axis). Correlation analysis between SVA, LL-TK, and other radiological spinopelvic parameters and was pursued. @entity1 were divided into two groups according to whether @entity1 were well-aligned in sagittal plane: Group A (well-aligned, SVA  <=50mm) and Group B (poorly aligned, SVA >50mm), and demographic and sagittal parameters were compared. LL-TK >= 0   and PI-LL  <=13   were used as a threshold value to evaluate their effectiveness of prediction for sagittal balance. RESULTS: A total of 129 @entity1 (M: 25 and F: 104) were included in this study. SVA was significantly correlated with NRS (numeric rating scales), age, @entity1515 , PT, LL-TK, and PI-LL (all, P<0.05). Age, maxTK, @entity1515 , SS, PT, PI, SVA, and NRS were significantly correlated with LL-TK (all P<0.05). Significant differences were found in age, @entity1515 , PT, LL-TK, PI-LL, SVA, and NRS between Group A (M: 15 and F: 72) and Group B (M: 10 and F: 32) (all P<0.05). Furthermore, both LL-TK >= 0   and PI-LL  <=13   were observed in 75 patents, among which SVA  <=50mm was found in 67 @entity1 (89%). Among @entity1 whose LL-TK and PI-LL were <0   and >13  , 34 @entity1 were poorly aligned (34/39, 87%). CONCLUSION: LL-TK was a good regional predictor for sagittal balance in elderly population, especially combined with PI-LL. LEVEL OF EVIDENCE: 4.

Lumbar XXXX Minus @entity1513 : A Novel Regional Predictor for Sagittal Balance in Elderly Populations.

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity1513 :: ('MESH:D007738', 'Disease') :: ['thoracic kyphosis'] @entity1515 :: ('MESH:D008141', 'Disease') :: ['max lumbar lordosis', 'maxLL']
@entity1515 :: (MESH:D008141,Disease) :: ['Lordosis']
