Reliability analysis of spino-pelvic parameters in adult spinal deformity

A comparison of whole spine and pelvic radiographs

Rui Qiang Chen, Naobumi Hosogane, Kota Watanabe, Haruki Funao, Eijiro Okada, Nobuyuki Fujita, Tomohiro Hikata, Akio Iwanami, Takashi Tsuji, Ken Ishii, Takayuki Abe, Yoshiaki Toyama, Masaya Nakamura, Morio Matsumoto

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Study Design. Retrospective study. Objective. To examine the reliabilities of sagittal spino-pelvic alignment measurements using whole spine-pelvic and local pelvic radiographs and to determine whether spinal deformity affects these reliabilities. Summary of Background Data. Sagittal spino-pelvic alignment is important in adult spinal deformity patients (ASD). Spino-pelvic parameters are closely related to health-related quality of life and indispensable for surgical planning. However, few studies have focused on the reliability of these measurements. Methods. Three spino-pelvic parameters, pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS) were measured in 2 patient groups: 33 adult scoliosis (AS) and 33 nondeformity (ND) patients, using whole spine-pelvic lateral radiographs (whole spine radiographs) and local pelvic lateral radiographs (local pelvic radiographs), by 5 experienced spine surgeons. Intra- and interobserver reliabilities for each procedure were evaluated by intraclass correlation coefficients (ICC). The interobserver reliability differences between the 2 procedures were statistically evaluated. The difference between the largest and smallest measurements among the 5 observers was also evaluated in the AS and ND groups. Results. Measurement of the 3 parameters using whole spine or local pelvic radiographs showed good to excellent intraobserver reliability (range of ICC: 0.820-0.935). The interobserver reliabilities of PI and PT from local pelvic radiographs were significantly higher than those from whole spine radiographs (P<0.002). The intraobserver reliabilities of PI and PT from pelvic radiographs tended to be higher than those from whole spine radiographs, but the differences were not statistically significant. The reliability of SS was comparable between the 2 methods. The differences between the highest and lowest PI and PT measurements were smaller with the pelvic compared to whole spine radiographs. These findings were consistent in the AS and ND groups. Conclusion. Local pelvic radiography is more reliable than whole spine radiography for determining spino-pelvic parameters, and we recommend its use for evaluating ASD patients.

Original languageEnglish
Pages (from-to)320-327
Number of pages8
JournalSpine
Volume41
Issue number4
DOIs
Publication statusPublished - 01-02-2016

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Spine
Scoliosis
Incidence
Radiography
Retrospective Studies
Quality of Life

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine
  • Clinical Neurology

Cite this

Chen, R. Q., Hosogane, N., Watanabe, K., Funao, H., Okada, E., Fujita, N., ... Matsumoto, M. (2016). Reliability analysis of spino-pelvic parameters in adult spinal deformity: A comparison of whole spine and pelvic radiographs. Spine, 41(4), 320-327. https://doi.org/10.1097/BRS.0000000000001208
Chen, Rui Qiang ; Hosogane, Naobumi ; Watanabe, Kota ; Funao, Haruki ; Okada, Eijiro ; Fujita, Nobuyuki ; Hikata, Tomohiro ; Iwanami, Akio ; Tsuji, Takashi ; Ishii, Ken ; Abe, Takayuki ; Toyama, Yoshiaki ; Nakamura, Masaya ; Matsumoto, Morio. / Reliability analysis of spino-pelvic parameters in adult spinal deformity : A comparison of whole spine and pelvic radiographs. In: Spine. 2016 ; Vol. 41, No. 4. pp. 320-327.
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title = "Reliability analysis of spino-pelvic parameters in adult spinal deformity: A comparison of whole spine and pelvic radiographs",
abstract = "Study Design. Retrospective study. Objective. To examine the reliabilities of sagittal spino-pelvic alignment measurements using whole spine-pelvic and local pelvic radiographs and to determine whether spinal deformity affects these reliabilities. Summary of Background Data. Sagittal spino-pelvic alignment is important in adult spinal deformity patients (ASD). Spino-pelvic parameters are closely related to health-related quality of life and indispensable for surgical planning. However, few studies have focused on the reliability of these measurements. Methods. Three spino-pelvic parameters, pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS) were measured in 2 patient groups: 33 adult scoliosis (AS) and 33 nondeformity (ND) patients, using whole spine-pelvic lateral radiographs (whole spine radiographs) and local pelvic lateral radiographs (local pelvic radiographs), by 5 experienced spine surgeons. Intra- and interobserver reliabilities for each procedure were evaluated by intraclass correlation coefficients (ICC). The interobserver reliability differences between the 2 procedures were statistically evaluated. The difference between the largest and smallest measurements among the 5 observers was also evaluated in the AS and ND groups. Results. Measurement of the 3 parameters using whole spine or local pelvic radiographs showed good to excellent intraobserver reliability (range of ICC: 0.820-0.935). The interobserver reliabilities of PI and PT from local pelvic radiographs were significantly higher than those from whole spine radiographs (P<0.002). The intraobserver reliabilities of PI and PT from pelvic radiographs tended to be higher than those from whole spine radiographs, but the differences were not statistically significant. The reliability of SS was comparable between the 2 methods. The differences between the highest and lowest PI and PT measurements were smaller with the pelvic compared to whole spine radiographs. These findings were consistent in the AS and ND groups. Conclusion. Local pelvic radiography is more reliable than whole spine radiography for determining spino-pelvic parameters, and we recommend its use for evaluating ASD patients.",
author = "Chen, {Rui Qiang} and Naobumi Hosogane and Kota Watanabe and Haruki Funao and Eijiro Okada and Nobuyuki Fujita and Tomohiro Hikata and Akio Iwanami and Takashi Tsuji and Ken Ishii and Takayuki Abe and Yoshiaki Toyama and Masaya Nakamura and Morio Matsumoto",
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Chen, RQ, Hosogane, N, Watanabe, K, Funao, H, Okada, E, Fujita, N, Hikata, T, Iwanami, A, Tsuji, T, Ishii, K, Abe, T, Toyama, Y, Nakamura, M & Matsumoto, M 2016, 'Reliability analysis of spino-pelvic parameters in adult spinal deformity: A comparison of whole spine and pelvic radiographs', Spine, vol. 41, no. 4, pp. 320-327. https://doi.org/10.1097/BRS.0000000000001208

Reliability analysis of spino-pelvic parameters in adult spinal deformity : A comparison of whole spine and pelvic radiographs. / Chen, Rui Qiang; Hosogane, Naobumi; Watanabe, Kota; Funao, Haruki; Okada, Eijiro; Fujita, Nobuyuki; Hikata, Tomohiro; Iwanami, Akio; Tsuji, Takashi; Ishii, Ken; Abe, Takayuki; Toyama, Yoshiaki; Nakamura, Masaya; Matsumoto, Morio.

In: Spine, Vol. 41, No. 4, 01.02.2016, p. 320-327.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Reliability analysis of spino-pelvic parameters in adult spinal deformity

T2 - A comparison of whole spine and pelvic radiographs

AU - Chen, Rui Qiang

AU - Hosogane, Naobumi

AU - Watanabe, Kota

AU - Funao, Haruki

AU - Okada, Eijiro

AU - Fujita, Nobuyuki

AU - Hikata, Tomohiro

AU - Iwanami, Akio

AU - Tsuji, Takashi

AU - Ishii, Ken

AU - Abe, Takayuki

AU - Toyama, Yoshiaki

AU - Nakamura, Masaya

AU - Matsumoto, Morio

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Study Design. Retrospective study. Objective. To examine the reliabilities of sagittal spino-pelvic alignment measurements using whole spine-pelvic and local pelvic radiographs and to determine whether spinal deformity affects these reliabilities. Summary of Background Data. Sagittal spino-pelvic alignment is important in adult spinal deformity patients (ASD). Spino-pelvic parameters are closely related to health-related quality of life and indispensable for surgical planning. However, few studies have focused on the reliability of these measurements. Methods. Three spino-pelvic parameters, pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS) were measured in 2 patient groups: 33 adult scoliosis (AS) and 33 nondeformity (ND) patients, using whole spine-pelvic lateral radiographs (whole spine radiographs) and local pelvic lateral radiographs (local pelvic radiographs), by 5 experienced spine surgeons. Intra- and interobserver reliabilities for each procedure were evaluated by intraclass correlation coefficients (ICC). The interobserver reliability differences between the 2 procedures were statistically evaluated. The difference between the largest and smallest measurements among the 5 observers was also evaluated in the AS and ND groups. Results. Measurement of the 3 parameters using whole spine or local pelvic radiographs showed good to excellent intraobserver reliability (range of ICC: 0.820-0.935). The interobserver reliabilities of PI and PT from local pelvic radiographs were significantly higher than those from whole spine radiographs (P<0.002). The intraobserver reliabilities of PI and PT from pelvic radiographs tended to be higher than those from whole spine radiographs, but the differences were not statistically significant. The reliability of SS was comparable between the 2 methods. The differences between the highest and lowest PI and PT measurements were smaller with the pelvic compared to whole spine radiographs. These findings were consistent in the AS and ND groups. Conclusion. Local pelvic radiography is more reliable than whole spine radiography for determining spino-pelvic parameters, and we recommend its use for evaluating ASD patients.

AB - Study Design. Retrospective study. Objective. To examine the reliabilities of sagittal spino-pelvic alignment measurements using whole spine-pelvic and local pelvic radiographs and to determine whether spinal deformity affects these reliabilities. Summary of Background Data. Sagittal spino-pelvic alignment is important in adult spinal deformity patients (ASD). Spino-pelvic parameters are closely related to health-related quality of life and indispensable for surgical planning. However, few studies have focused on the reliability of these measurements. Methods. Three spino-pelvic parameters, pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS) were measured in 2 patient groups: 33 adult scoliosis (AS) and 33 nondeformity (ND) patients, using whole spine-pelvic lateral radiographs (whole spine radiographs) and local pelvic lateral radiographs (local pelvic radiographs), by 5 experienced spine surgeons. Intra- and interobserver reliabilities for each procedure were evaluated by intraclass correlation coefficients (ICC). The interobserver reliability differences between the 2 procedures were statistically evaluated. The difference between the largest and smallest measurements among the 5 observers was also evaluated in the AS and ND groups. Results. Measurement of the 3 parameters using whole spine or local pelvic radiographs showed good to excellent intraobserver reliability (range of ICC: 0.820-0.935). The interobserver reliabilities of PI and PT from local pelvic radiographs were significantly higher than those from whole spine radiographs (P<0.002). The intraobserver reliabilities of PI and PT from pelvic radiographs tended to be higher than those from whole spine radiographs, but the differences were not statistically significant. The reliability of SS was comparable between the 2 methods. The differences between the highest and lowest PI and PT measurements were smaller with the pelvic compared to whole spine radiographs. These findings were consistent in the AS and ND groups. Conclusion. Local pelvic radiography is more reliable than whole spine radiography for determining spino-pelvic parameters, and we recommend its use for evaluating ASD patients.

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