Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 17009
  Title Paraspinal skin temperature patterns: an interexaminer and intraexaminer reliability study
Journal J Manipulative Physiol Ther. 2004 Mar-Apr;27(3):155-159
Peer Review Yes
Publication Type Article
Abstract/Notes BACKGROUND: Paraspinal thermography is used by chiropractors as an aid in assessing the presence of vertebral subluxation. Few reliability studies have been carried out, with mixed results. Digital infrared scanning equipment is now available with location tracking that may enhance reproducibility. Digitized scans enable a computer-aided interpretation of thermographic patterns.

OBJECTIVE: To assess the ability of examiners to reproduce thermal patterns.

STUDY DESIGN: Repeated measures with 2 examiners assessing the same patient on 2 occasions. Thirty asymptomatic students served as subjects.

METHODS: A TyTron C-3000 handheld thermographic scanner interfaced to a Microsoft Windows compatible personal computer was used for all recordings. Each examiner recorded 2 scans on each patient. It took an average of 3 minutes to complete all 4 scans. Data were exported to a spreadsheet for initial analysis, then SPSS was used for calculation of intraclass correlation coefficients (ICC). Since the starting and stopping points of scans were not always the same, care was taken to align scans visually, using well-distinguished peaks on the charts as guides. Scans were cropped to remove artifacts that might have occurred at the beginning and end of the scans. Intraexaminer and interexaminer ICCs were calculated.

RESULTS: Skin temperatures ranged from 35.4 degrees C to 30.0 degrees C over all scans. The average temperatures changed little from the first to the last scans, indicating that subjects' overall skin temperatures were stable during the scanning procedure. Intraexaminer ICCs ranged from 0.953 to 0.984. The left and right channel data show slightly higher congruence than the Delta channel. The interexaminer reliability coefficients ranged from 0.918 to 0.975. Again, the Delta channel shows slightly less reliability, although the ICCs were quite high for all channels.

CONCLUSION: Intraexaminer and interexaminer reliability of paraspinal thermal scans using the TyTron C-3000 were found to be very high, with ICC values between 0.91 and 0.98. Changes seen in thermal scans when properly done are most likely due to actual physiological changes rather than equipment error.

Click on the above link for the PubMed record for this article; full text by subscription. This abstract is reproduced with the permission of the publisher.

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