Evidence map›Paper›PMID 41264220›Full record

ArticleSpine deformity2026

Pelvic incidence correlates more strongly with proximal than distal lordosis and most strongly with L1-pelvic angle.

Mark Kurapatti, Ryan Hoang, Albert Li, Yash Lahoti, Kareem Mohamed, Alexander Yu, Abhijeet Grewal, Timothy Hoang, Akiro Duey, Joshua Lee and 1 more

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Article in Spine deformity, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

11 authors.

Mark KurapattiDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA. mark.kurapatti@icahn.mssm.edu.ORCID http://orcid.org/0000-0002-8121-9439
Ryan HoangDepartment of Orthopedic Surgery, University of California Irvine Medical Center, Orange, CA, USA.
Albert LiDepartment of Orthopedic Surgery, Keck Medicine of University of South California, Los Angeles, CA, USA.
Yash LahotiDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.
Kareem MohamedDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.
Alexander YuDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.
Abhijeet GrewalDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.
Timothy HoangDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.
Akiro DueyDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.
Joshua LeeDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.
Samuel K ChoDepartment of Orthopedic Surgery, Icahn School of Medicine at Mount Sinai, The Mount Sinai Hospital, 5 East 98th Street 9th floor, New York, NY, 10029, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePelvic incidence (PI) is a critical morphologic parameter influencing sagittal spinal alignment. While the PI-lumbar lordosis (LL) mismatch is well studied, the extent to which PI correlates with proximal versus distal LL remains unclear. Additionally, the L1-pelvic angle (L1PA) is emerging as a potential metric for sagittal alignment assessment. This study aimed to evaluate the associations between PI, segmental LL, and L1PA to establish goal sagittal alignment benchmarks in a symptomatic non-deformity cohort.

methodsA retrospective analysis (STUDY-17-00660) was conducted on a large consecutive series of adults undergoing full-body biplanar radiographs. Patients with spinal deformity or prior spinal surgery were excluded. Measurements included PI, proximal LL (L1-L4), distal LL (L4-S1), global LL (L1-S1), and L1PA. Multivariable linear regression models were adjusted for age, sex, and body mass index (BMI). Correlation coefficients and Fisher's z tests were used to compare the strength of associations between PI and each alignment measure.

resultsA total of 507 patients (mean age 48.4 ± 17.2 years; 50.9% female) were included. Multivariate regression demonstrates a 10° increase in PI was associated with increases of 3.7° in proximal LL, 1.9° in distal LL, 5.6° in global LL, and 5.0° in L1PA (all p < 0.001). PI showed a stronger correlation with proximal LL (r = 0.50) than distal LL (r = 0.23) and the strongest correlation with L1PA (r = 0.79).

conclusionPI correlates more strongly with proximal than distal lumbar lordosis and most strongly with L1PA. These findings support greater emphasis on proximal lordosis and the utility of L1PA in the restoration of sagittal alignment in adult spinal deformity.

Indexed as

LordosisLumbar VertebraePelvic BonesPelvisAdultAgedFemaleHumansIncidenceMaleMiddle AgedRadiographyRetrospective StudiesLumbar lordosisPelvic incidenceRadiographicSagittal alignmentSpine morphology

Identifiers

PMID41264220

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.