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Research article
Norio Imai
Niigata University Graduate School of Medical and Dental Sciences
Corresponding Author
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Background: The anatomical sacral slope is considered as an anatomical pelvic parameter independent of femoral head centers for measurement of anatomical sacral slope and was previously described to strongly correlate with pelvic incidence on a two-dimensional examination of healthy subjects. However, the correlation between anatomical sacral slope and pelvic incidence was unclear in patients with developmental dysplasia of the hip. This study aimed to examine the correlation between anatomical sacral slope and other spinopelvic parameters by analyzing plain radiographs of female patients with developmental dysplasia of the hip.
Methods: Eighty-four women with developmental dysplasia of the hip were examined. Lumbar lordosis, thoracic kyphosis, pelvic incidence, sacral slope, and anatomical sacral slope (the angle formed by the straight line of the S1 superior endplate and a line at a right angle to the anterior pelvic plane), were determined by analyzing plain radiographs. The correlations were examined by Pearson correlation coefficients, and intra- and inter-rater intraclass correlation coefficients were evaluated for reliability.
Results: A strong correlation was observed between pelvic incidence and anatomical sacral slope (r=0.725, p<0.001). In addition, the correlation between anatomical sacral slope and lumbar lordosis was similar to that between pelvic incidence and lumbar lordosis (r=0.661, p<0.001 and r=0.554, p<0.001, respectively). The intra-rater intraclass correlation coefficient values were 0.869 and 0.824 for anatomical sacral slope and pelvic incidence, respectively. Furthermore, the inter-rater intraclass correlation coefficient values were 0.83 and 0.685 for anatomical sacral slope and pelvic incidence, respectively.
Conclusions: We observed that the strong correlation between anatomical sacral slope and pelvic incidence in patients with developmental dysplasia of the hip was equal to that in normal healthy subjects. The correlation between anatomical sacral slope and lumbar lordosis was equal to that between pelvic incidence and lumbar lordosis. Additionally, the intraclass correlation coefficient values for the anatomical sacral slope were slightly higher than those for pelvic incidence. Thus, we conclude that anatomical sacral slope can be considered as a helpful anatomical pelvic parameter that is a substitute for pelvic incidence not only in normal healthy subjects, but also in patients with developmental dysplasia of the hip.
Keywords
anatomical sacral slope, developmental dysplasia of the hip, lumbar lordosis, pelvic incidence
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CURRENT STATUS: Published
View the published article at Journal of Orthopaedic Surgery and Research.
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Posted 13 Oct, 2020
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Editorial decision: Accept
On 08 Oct, 2020
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On 05 Oct, 2020
Reviewers invited
Invitations sent on 05 Oct, 2020
Reviewer #1 agreed
On 05 Oct, 2020
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Received 05 Oct, 2020
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On 04 Oct, 2020
Editor invited
On 04 Oct, 2020
No comments provided
Review #3 received
Received 16 Sep, 2020
Editorial decision: Major revision
On 16 Sep, 2020
Review #2 received
Received 09 Sep, 2020
Review #5 received
Received 07 Sep, 2020
Review #4 received
Received 07 Sep, 2020
Reviewer #5 agreed
On 05 Sep, 2020
Reviewer #4 agreed
On 04 Sep, 2020
Reviewer #2 agreed
On 31 Aug, 2020
Reviewer #3 agreed
On 31 Aug, 2020
Review #1 received
Received 23 Aug, 2020
Reviewer #1 agreed
On 11 Aug, 2020
Editor assigned
On 16 Jun, 2020
Reviewers invited
Invitations sent on 16 Jun, 2020
Editor invited
On 15 Jun, 2020
Submission checks complete
On 10 Jun, 2020
First submitted
On 05 Jun, 2020
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Subject Areas
Orthopedic Surgery
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A new preprint design is coming!
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See the published version of this preprint at Journal of Orthopaedic Surgery and Research.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research article
Norio Imai
Niigata University Graduate School of Medical and Dental Sciences
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Journal of Orthopaedic Surgery and Research.
Version 2
Posted 13 Oct, 2020
No community comments so far
Editorial decision: Accept
On 08 Oct, 2020
Editor assigned
On 05 Oct, 2020
Reviewers invited
Invitations sent on 05 Oct, 2020
Reviewer #1 agreed
On 05 Oct, 2020
Review #1 received
Received 05 Oct, 2020
Submission checks complete
On 04 Oct, 2020
Editor invited
On 04 Oct, 2020
No comments provided
Review #3 received
Received 16 Sep, 2020
Editorial decision: Major revision
On 16 Sep, 2020
Review #2 received
Received 09 Sep, 2020
Review #5 received
Received 07 Sep, 2020
Review #4 received
Received 07 Sep, 2020
Reviewer #5 agreed
On 05 Sep, 2020
Reviewer #4 agreed
On 04 Sep, 2020
Reviewer #2 agreed
On 31 Aug, 2020
Reviewer #3 agreed
On 31 Aug, 2020
Review #1 received
Received 23 Aug, 2020
Reviewer #1 agreed
On 11 Aug, 2020
Editor assigned
On 16 Jun, 2020
Reviewers invited
Invitations sent on 16 Jun, 2020
Editor invited
On 15 Jun, 2020
Submission checks complete
On 10 Jun, 2020
First submitted
On 05 Jun, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Orthopedic Surgery
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Journal of Orthopaedic Surgery and Research.
Background: The anatomical sacral slope is considered as an anatomical pelvic parameter independent of femoral head centers for measurement of anatomical sacral slope and was previously described to strongly correlate with pelvic incidence on a two-dimensional examination of healthy subjects. However, the correlation between anatomical sacral slope and pelvic incidence was unclear in patients with developmental dysplasia of the hip. This study aimed to examine the correlation between anatomical sacral slope and other spinopelvic parameters by analyzing plain radiographs of female patients with developmental dysplasia of the hip.
Methods: Eighty-four women with developmental dysplasia of the hip were examined. Lumbar lordosis, thoracic kyphosis, pelvic incidence, sacral slope, and anatomical sacral slope (the angle formed by the straight line of the S1 superior endplate and a line at a right angle to the anterior pelvic plane), were determined by analyzing plain radiographs. The correlations were examined by Pearson correlation coefficients, and intra- and inter-rater intraclass correlation coefficients were evaluated for reliability.
Results: A strong correlation was observed between pelvic incidence and anatomical sacral slope (r=0.725, p<0.001). In addition, the correlation between anatomical sacral slope and lumbar lordosis was similar to that between pelvic incidence and lumbar lordosis (r=0.661, p<0.001 and r=0.554, p<0.001, respectively). The intra-rater intraclass correlation coefficient values were 0.869 and 0.824 for anatomical sacral slope and pelvic incidence, respectively. Furthermore, the inter-rater intraclass correlation coefficient values were 0.83 and 0.685 for anatomical sacral slope and pelvic incidence, respectively.
Conclusions: We observed that the strong correlation between anatomical sacral slope and pelvic incidence in patients with developmental dysplasia of the hip was equal to that in normal healthy subjects. The correlation between anatomical sacral slope and lumbar lordosis was equal to that between pelvic incidence and lumbar lordosis. Additionally, the intraclass correlation coefficient values for the anatomical sacral slope were slightly higher than those for pelvic incidence. Thus, we conclude that anatomical sacral slope can be considered as a helpful anatomical pelvic parameter that is a substitute for pelvic incidence not only in normal healthy subjects, but also in patients with developmental dysplasia of the hip.
Figure 1
Figure 2
Figure 3
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