Abstract
Study Design. This study compared the reproducibility of three techniques used to measure translation between the occiput and C1 in children with Down syndrome. Objectives. Intraobserver and interobserver variability were computed to determine if there is a reliable way to measure occiput-C1 instability. Summary of Background Data. No studies have been performed comparing measurement techniques in children with Down syndrome. Methods. Powers ratios, basion-axial intervals, and translational anteroposterior motion as described by Wiesel and Rothman were calculated for 60 pairs of flexion-extension lateral cervical radiographs from children with Down syndrome. Calculations were made on two occasions by four reviewers. Results. Mean differences between measurements for two observers were 0.14 for the Powers ratio, 1.3 mm for the Wiesel technique, and 1.8 mm for the basion- axial interval. The 95th percentiles of the differences between measurements for two observers were 0.38 for Powers ratios, 3.5 mm for the Wiesel technique, and 5.3 mm for the basion-axial interval. Conclusions. Measurement of atlanto-occipital translation by any of these methods is not reproducible. Although the technique by Wiesel and Rothman is the easiest to apply, confirmation of instability with magnetic resonance imaging should guide management.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2463-2468 |
| Number of pages | 6 |
| Journal | Spine |
| Volume | 21 |
| Issue number | 21 |
| DOIs | |
| State | Published - Nov 1 1996 |
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Keywords
- atlanto-occipital instability
- Down syndrome
- reliability
ASJC Scopus subject areas
- Physiology
- Clinical Neurology
- Orthopedics and Sports Medicine
Cite this
Reproducibility in the measurement of atlanto-occipital instability in children with Down syndrome. / Karol, Lori A.; Sheffield, Eugene G.; Crawford, Kevin; Moody, Marilyn K.; Browne, Richard H.
In: Spine, Vol. 21, No. 21, 01.11.1996, p. 2463-2468.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Reproducibility in the measurement of atlanto-occipital instability in children with Down syndrome
AU - Karol, Lori A.
AU - Sheffield, Eugene G.
AU - Crawford, Kevin
AU - Moody, Marilyn K.
AU - Browne, Richard H.
PY - 1996/11/1
Y1 - 1996/11/1
N2 - Study Design. This study compared the reproducibility of three techniques used to measure translation between the occiput and C1 in children with Down syndrome. Objectives. Intraobserver and interobserver variability were computed to determine if there is a reliable way to measure occiput-C1 instability. Summary of Background Data. No studies have been performed comparing measurement techniques in children with Down syndrome. Methods. Powers ratios, basion-axial intervals, and translational anteroposterior motion as described by Wiesel and Rothman were calculated for 60 pairs of flexion-extension lateral cervical radiographs from children with Down syndrome. Calculations were made on two occasions by four reviewers. Results. Mean differences between measurements for two observers were 0.14 for the Powers ratio, 1.3 mm for the Wiesel technique, and 1.8 mm for the basion- axial interval. The 95th percentiles of the differences between measurements for two observers were 0.38 for Powers ratios, 3.5 mm for the Wiesel technique, and 5.3 mm for the basion-axial interval. Conclusions. Measurement of atlanto-occipital translation by any of these methods is not reproducible. Although the technique by Wiesel and Rothman is the easiest to apply, confirmation of instability with magnetic resonance imaging should guide management.
AB - Study Design. This study compared the reproducibility of three techniques used to measure translation between the occiput and C1 in children with Down syndrome. Objectives. Intraobserver and interobserver variability were computed to determine if there is a reliable way to measure occiput-C1 instability. Summary of Background Data. No studies have been performed comparing measurement techniques in children with Down syndrome. Methods. Powers ratios, basion-axial intervals, and translational anteroposterior motion as described by Wiesel and Rothman were calculated for 60 pairs of flexion-extension lateral cervical radiographs from children with Down syndrome. Calculations were made on two occasions by four reviewers. Results. Mean differences between measurements for two observers were 0.14 for the Powers ratio, 1.3 mm for the Wiesel technique, and 1.8 mm for the basion- axial interval. The 95th percentiles of the differences between measurements for two observers were 0.38 for Powers ratios, 3.5 mm for the Wiesel technique, and 5.3 mm for the basion-axial interval. Conclusions. Measurement of atlanto-occipital translation by any of these methods is not reproducible. Although the technique by Wiesel and Rothman is the easiest to apply, confirmation of instability with magnetic resonance imaging should guide management.
KW - atlanto-occipital instability
KW - Down syndrome
KW - reliability
UR - http://www.scopus.com/inward/record.url?scp=0029852261&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029852261&partnerID=8YFLogxK
U2 - 10.1097/00007632-199611010-00010
DO - 10.1097/00007632-199611010-00010
M3 - Article
C2 - 8923632
AN - SCOPUS:0029852261
VL - 21
SP - 2463
EP - 2468
JO - Spine
JF - Spine
SN - 0362-2436
IS - 21
ER -