Evaluation of demographic factors affecting predictability of the sacro‐femoral‐pubic angle in healthy adolescents

Liu, Zhen; Bao, Hongda; Qiu, Yong; Qiao, Jie; Xu, Leilei; Zhu, Feng; Qian, Bangping; Zhu, Zezhang

doi:10.1111/joa.12268

Cited by 4 publications

(11 citation statements)

References 24 publications

(45 reference statements)

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“…This suggests the SFP may not be reliable for estimating absolute values of PT from AP pelvic radiographs of patients awaiting THA and although a surrogate marker, it should be used with caution. These findings differ in‐part from previous reports, which support the use of SFP for estimation of PT 24–28 . We did, however, find a significant correlation between the PI and the difference between the estimated and true PT in the standing position (Pearson's r = −0.644; p < .001).…”

Section: Discussioncontrasting

confidence: 99%

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The accuracy in determining pelvic tilt from anteroposterior pelvic radiographs in patients awaiting hip arthroplasty

Innmann

McGoldrick

Ratra

et al. 2021

Journal Orthopaedic Research

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Spinopelvic mobility affects outcome after THA. Whether the sacro‐femoral‐pubic (SFP) angle, measured on AP radiographs, can be reliably used to estimate pelvic tilt (PT) in hip osteoarthritis patients is unknown. This study aimed to (1) validate the use of the SFP angle in the calculation of PT from AP radiographs, and (2) identify individual patient factors affecting the estimation of PT. A cohort of 100 patients awaiting THA for end‐stage hip osteoarthritis was prospectively studied. AP and lateral radiographs, taken in the standing and relaxed‐seated positions were evaluated for spinopelvic measurements (SFP, PT, and pelvic incidence [PI]). To validate the SFP angle, estimated PT values using the formula [PT = 75°‐SFP] were compared to the true, measured values from the lateral radiographs. Despite good agreement for the estimated and true PT (16.2 ± 5.9° vs. 15.5 ± 8.6°; p = .315), a significantly poorer agreement could be found between the two methods at high or low values of PT. Patient‐specific PI correlated with the difference between the two measurement methods (Pearson's r = −0.644; p < .001). However, the change in SFP angle equaled approximately the change in pelvic tilt (∆PT = 2°−∆SFP; Pearson's r = −0.934; p < .001). Absolute values for the sagittal PT should not be estimated from AP pelvic radiographs in patients awaiting total hip arthroplasty. However, the relative change in PT between different positions equals approximately the change in SFP angle. This may allow functional cup orientation after THA to be determined between different postures from an AP radiograph of the pelvis. The SFP angle has moderate accuracy in determining a patient's pelvic tilt; however, it can accurately determine a patient's change in pelvic tilt in different positions.

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Section: Discussioncontrasting

confidence: 99%

“…Most of the available literature examining the relationship between SFP and PT is in the setting of the evaluation of spinal pathology 24–27 . These reports include patients of variable ages and with variable underlying disease processes.…”

Section: Discussionmentioning

confidence: 99%

The accuracy in determining pelvic tilt from anteroposterior pelvic radiographs in patients awaiting hip arthroplasty

Innmann

McGoldrick

Ratra

et al. 2021

Journal Orthopaedic Research

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“…Blondel et al [ 7 ] showed that the SFP angle obtained from coronal radiographs of the pelvis correlated with PT and suggested the formula PT=74.6−0.942×(SFP angle). Following this report, other authors have demonstrated a correlation between PT and the SFP angle, although these authors focused on different diseases and patients of different ages [ 8 9 10 11 ]. Our formula differs from the formulae reported to date with regard to the intercept and slope.…”

Section: Discussionmentioning

confidence: 83%

“…In females and males, the vertical distance between the upper edge of the pubic symphysis and the midpoint of the sacrococcygeal joint showed the strongest correlation among all other parameters (Pearson's correlation coefficient: 0.63 in females, 0.68 in males). However, numerous studies have examined the relationship between PT and the SFP angle [ 8 9 10 11 24 ]. Our results also support the use of the SFP angle in the prediction of PT.…”

Section: Discussionmentioning

confidence: 99%

“…Blondel et al [ 7 ] reported a correlation between PT and the sacro-femoral-pubic (SFP) angle, which is measured from coronal radiographs of the pelvis, and concluded that even if the femoral head is blurred in sagittal radiographs, it is possible to predict PT from the SFP angle. A correlation between PT and the SFP angle has been reported in different diseases and in subjects of various ages [ 8 9 10 11 ]. However, to date there are no reports on the association between PT and the SFP angle in middle-aged and elderly Asian individuals.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the Relationship between Pelvic Tilt and the Sacro-Femoral-Pubic Angle in Middle-Aged and Elderly Asian Individuals

Kitagawa¹,

Iizuka²,

Kobayashi³

et al. 2017

Asian Spine J

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Study DesignCross-sectional study.PurposeThe purpose of this study was to evaluate the correlation between pelvic tilt (PT) and the sacro-femoral-pubic (SFP) angle, which is easier to identify than PT, in middle-aged and elderly Asian subjects from the general population.Overview of LiteratureMeasuring PT is important in the diagnosis and treatment of adult spinal deformity. However, identifying femoral heads, which are necessary to determine PT, using sagittal radiographs is often difficult.MethodsStanding coronal and sagittal pelvic radiographs of individuals aged more than 50 years were taken during a local medical examination. The subjects were divided into female, male, and total groups at the time of evaluation. Linear regression analysis was performed to investigate the relationship between PT and the SFP angle, which were obtained from the X-rays.ResultsThe present study included 291 subjects. There were no statistically significant differences between the left and right SFP angles, and there was gender difference regarding the SFP angle. However, a gender difference was observed regarding PT. The correlation between PT and the SFP angle was substantiated in each group. Pearson's correlation coefficients between PT and the SFP angle in the total, female, and male groups were 0.696, 0.853, and 0.619, respectively. In the linear regression analysis, PT was calculated as follows: PT=60.1−0.77×(SFP angle) in the total group, PT=62.8−0.80×(SFP angle) in the female group, and PT=51.5−0.64×(SFP angle) in the male group.ConclusionsA significant correlation between PT and the SFP angle was observed in middle-aged and elderly Asian subjects from the general population.

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Evaluating Pelvic Tilt Using the Pelvic Antero-Posterior Projection Images: A Systematic Review

Chai,

Boudali,

Khadra

et al. 2024

The Journal of Arthroplasty

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Evaluation of demographic factors affecting predictability of the sacro‐femoral‐pubic angle in healthy adolescents

Cited by 4 publications

References 24 publications

The accuracy in determining pelvic tilt from anteroposterior pelvic radiographs in patients awaiting hip arthroplasty

The accuracy in determining pelvic tilt from anteroposterior pelvic radiographs in patients awaiting hip arthroplasty

Assessment of the Relationship between Pelvic Tilt and the Sacro-Femoral-Pubic Angle in Middle-Aged and Elderly Asian Individuals

Evaluating Pelvic Tilt Using the Pelvic Antero-Posterior Projection Images: A Systematic Review

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