Can Lumbopelvic Parameters Be Used to Predict Thoracic Kyphosis at all Ages? A National Cross-Sectional Study

Study design National cross-sectional study. Objective Thoracic kyphosis (TK) is related to sagittal parameters as pelvic tilt (PT), lumbar lordosis (LL) and pelvic incidence (PI). The equation TK = 2 (PT+LL–PI) was validated for adolescents. The purpose of this study was to investigate if this equa...

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Published in:Global spine journal 2024-05, Vol.14 (4), p.1116-1124
Main Authors: Solla, Federico, Ilharreborde, Brice, Blondel, Benjamin, Prost, Solène, Bauduin, Eloïse, Laouissat, Féthi, Riouallon, Guillaume, Wolff, Stéphane, Challier, Vincent, Obeid, Ibrahim, Boissière, Louis, Ferrero, Emmanuelle, Lamas, Vincent, Le Huec, Jean-Charles, Bourret, Stéphane, Faddoul, Joe, Abi Lahoud, Georges Naïm, Fière, Vincent, Kerckhove, Michiel Vande, Lebhar, Jonathan, Giorgi, Hadrien, Faure, Aymeric, Sauleau, Erik A., Pesenti, Sébastien, Charles, Yann Philippe
Format: Article
Language:English
Subjects:
Cross-sectional studies
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Summary:Study design National cross-sectional study. Objective Thoracic kyphosis (TK) is related to sagittal parameters as pelvic tilt (PT), lumbar lordosis (LL) and pelvic incidence (PI). The equation TK = 2 (PT+LL–PI) was validated for adolescents. The purpose of this study was to investigate if this equation correctly predicts TK regardless of age. Methods Sagittal alignment parameters were assessed on full spine radiographs of 2599 individuals without spine pathology (1488 females, 1111 males). Calculated TK (CTK) = 2 (PT+LL–PI) and measured TK (MTK) were compared by calculating the gap and using a linear regression between both parameters. Subgroup analyses were performed for gender, age, TK groups (≤20°, 21°-40°, 41°-60°, >60°), and PI groups (60°). Results Average values in the total population were: MTK 45.0°, CTK 36.9°. Average TK gap was 8.1°, 5.2° in females (intercept 11.7, slope .61) and 11.9° in males (intercept 7.1, slope .58). The mean gap was 3.6° for 15-34 years, 5.7° under 15 years and it increased progressively after 35 years with a maximum of 19.9° over 80 years. The gap also increased with the amount of MTK: -3.5° for TK60°. Differences in gaps were minor between PI groups. The intercept was smallest and slopes >.6 for PI
ISSN:2192-5682
2192-5690
DOI:10.1177/21925682221134039