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| ORIGINAL ARTICLE |
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| Year : 2017 | Volume
: 63
| Issue : 3 | Page : 157-161 |
Inter- and intra-observer variability of ultrasonographic arm muscle thickness measurement by critical care physicians
V Hadda1, R Kumar1, A Dhungana1, MA Khan2, K Madan1, GC Khilnani1
1 Department of Pulmonary Medicine and Sleep Disorders, All Institute of Medical Sciences, New Delhi, India
2 Department of Biostatistics, All Institute of Medical Sciences, New Delhi, India
Correspondence Address:
V Hadda
Department of Pulmonary Medicine and Sleep Disorders, All India Institute of Medical Sciences, New Delhi
India
 Source of Support: None, Conflict of Interest: None  | Check |
DOI: 10.4103/0022-3859.201412
Purpose: The aim of this study was to assess inter- and intra-observer variability of arm muscle thickness measured by critical care physicians using bedside ultrasonography (USG). Methodology: This prospective study included twenty patients admitted with sepsis. Three measurements of thickness of right arm muscles of each patient using B-mode USG were taken by two critical care fellows, independently. Intra- and inter-observer reliability was tested using intraclass correlation coefficient (ICC). Results: The mean 1st, 2nd, and 3rd measurements of muscle thickness recorded by observer 1 and 2 were 23.620 (±4.171) versus 23.840 (±3.849) mm, 23.235 (±3.620) versus 23.625 (±4.062) mm, and 24.125 (±4.098) versus 23.965 (±3.651) mm, respectively. The average muscle thickness measured by first and second observer was 23.660 (±3.834) mm and 23.810 (±3.674) mm, respectively. ICC for intra-observer variability for observer 1 and 2 was 0.964 (95% confidence interval [CI] 0.924–0.985) and 0.949 (95% CI 0.892–0.978), respectively. ICC for inter-observer variability was 0.995 (95% CI 0.988–0.998). Conclusions: USG is a reliable tool for assessment of arm muscle thickness by critical care physicians.
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