TY - JOUR
T1 - Inter- and intra-observer variability of the Los Angeles classification
T2 - A reassessment
AU - Nasseri-Moghaddam, Siavosh
AU - Razjouyan, Hadi
AU - Nouraei, Mehdi
AU - Alimohammadi, Maysam
AU - Mamarabadi, Mansoureh
AU - Vahedi, Homayoon
AU - Pourshams, Akram
AU - Mohammadnejad, Mehdi
AU - Zamani, Farhad
AU - Sadr, Farhad
AU - Darvish-Moghaddam, Sodaif
AU - Farsi, Pantea
AU - Malekzadeh, Reza
PY - 2007/1/1
Y1 - 2007/1/1
N2 - Background: Los Angeles classification is widely adopted for reporting endoscopic gastroesophageal reflux disease. We assessed the inter- and intra-observer variability of the Los Angeles classification. Methods: Still images (n = 254) of the lower esophagus were presented to 9 gastroenterologists (6 experts and 3 trainees) and they were asked to report the images according to the Los Angeles classification. After 2 weeks the images were reordered and they were asked to report them again. Kappa statistic was calculated for intra- and inter-observer variability. Results: The kappa for intra-observer agreement, was 0.54 (attendings: 0.54; trainees; 0.55; P = not significant) and the inter-observer agreement was 0.22 (attendings: 0.20; trainees: 0.31; P = 0.027). The inter- and intra-observer kappa values in differentiating nonerosive from erosive cases were 0.22 (attendings: 0.21; trainees: 0.31, P = not significant) and 0.57 (aftendings: 0.58; trainees: 0.55, P = not significant), respectively. Conclusion: According to our data, the Los Angeles classification has acceptable intraobserver variability, both for detecting presence or absence of erosions and for differentiating between different degrees of esophagitis, while its inter-observer performance seems to be less acceptable. It may be reasonable and timely to have another look at the Los Angeles classification to see whether its performance can be improved even further.
AB - Background: Los Angeles classification is widely adopted for reporting endoscopic gastroesophageal reflux disease. We assessed the inter- and intra-observer variability of the Los Angeles classification. Methods: Still images (n = 254) of the lower esophagus were presented to 9 gastroenterologists (6 experts and 3 trainees) and they were asked to report the images according to the Los Angeles classification. After 2 weeks the images were reordered and they were asked to report them again. Kappa statistic was calculated for intra- and inter-observer variability. Results: The kappa for intra-observer agreement, was 0.54 (attendings: 0.54; trainees; 0.55; P = not significant) and the inter-observer agreement was 0.22 (attendings: 0.20; trainees: 0.31; P = 0.027). The inter- and intra-observer kappa values in differentiating nonerosive from erosive cases were 0.22 (attendings: 0.21; trainees: 0.31, P = not significant) and 0.57 (aftendings: 0.58; trainees: 0.55, P = not significant), respectively. Conclusion: According to our data, the Los Angeles classification has acceptable intraobserver variability, both for detecting presence or absence of erosions and for differentiating between different degrees of esophagitis, while its inter-observer performance seems to be less acceptable. It may be reasonable and timely to have another look at the Los Angeles classification to see whether its performance can be improved even further.
UR - http://www.scopus.com/inward/record.url?scp=33846668633&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33846668633&partnerID=8YFLogxK
M3 - Article
C2 - 17198454
AN - SCOPUS:33846668633
SN - 1029-2977
VL - 10
SP - 48
EP - 53
JO - Archives of Iranian Medicine
JF - Archives of Iranian Medicine
IS - 1
ER -