IBD	Inflammatory bowel disease
pIBD	Pediatric inflammatory bowel disease
UC	Ulcerative colitis
CD	Crohn’s disease
SD	Standard deviation
IQR	Interquartile range
PCDAI	PCDAI. Pediatric Crohn’s Disease Activity Index
PUCAI	Pediatric Ulcerative Colitis Activity Index
SEM	Standard error of the mean
PPV	Positive predictive value
SEM	Standard error of the mean
PPV	Positive predictive value
NPV	Negative predictive value