Can 2 Different Fecal Calprotectin Assays be Used Interchangeably in IBD Treatment?
J Clin Gastroenterol
; 56(1): e27-e30, 2022 01 01.
Article
in En
| MEDLINE
| ID: mdl-33116067
ABSTRACT
BACKGROUND:
Fecal calprotectin (FC) is a biomarker for inflammation in inflammatory bowel disease (IBD). Interpretation of results can be complicated because of the use of different assays to determine FC. GOALS To assess the agreement between 2 different assays for determining FC in patients with IBD.METHODS:
Samples from adults and children with IBD were tested with 2 assays (1) EliA 2 Calprotectin and (2) EK-Cal. Samples were uniformly tested on the same day. Interassay variability was displayed in a Bland-Altman plot. The difference in categorization of the FC result (1 0 to 250 mg/kg, 2 250 to 500 mg/kg, 3 >500 mg/kg) was assessed with the linear weighted κ for adults and children separately.RESULTS:
A total of 171 patients [mean age 33 (range 7 to 81); 92 (54%) female; 117 (68%) Crohn's disease; 53 (31%) ulcerative colitis] were included. Median (interquartile ranges) FC levels were 281 mg/kg (70 to 971) (EK-Cal) and 159 mg/kg (31 to 778) (EliA 2), and the mean delta FC was 89 mg/kg. In the adult population, there was substantial agreement between the 2 assays (κ 0.72; SE 0.06; 95% confidence interval, 0.60-0.83) and for pediatric patients, the agreement was almost perfect (κ 0.83; SE 0.06; 95% confidence interval 0.70-0.95). Five of 171 patients (all aged ≥17 y and all with colonic disease) had a difference of 2 categories (1 vs. 3) between assays. Interassay variability was the highest in category 3.CONCLUSIONS:
The agreement between the EliA 2 and EK-Cal assay in this cohort of IBD patients is substantial to almost perfect. Interassay variability is higher in the highest FC category.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Inflammatory Bowel Diseases
/
Colitis, Ulcerative
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Crohn Disease
Type of study:
Diagnostic_studies
Limits:
Adult
/
Child
/
Female
/
Humans
Language:
En
Journal:
J Clin Gastroenterol
Year:
2022
Document type:
Article