Global research trends on diet and nutrition in Crohn’s disease

Table 1 Top 10 productive countries/regions involved in nutrition and Crohn’s disease from 2002 to 2021

Ranking	Country	No. of documents	%
1st	United States	208	16.81
2nd	United Kingdom	192	15.52
3rd	China	109	8.81
4th	Japan	98	7.92
5th	Canada	88	7.11
6th	Germany	73	5.90
7th	Spain	71	5.74
8th	Italy	70	5.66
9th	France	67	5.42
10th	Poland	61	4.93

Table 2 Top 10 productive institutions ranked by the number of publications

Ranking	Institute	Country	No. of documents	%
1st	University of Otago, Christchurch	New Zealand	29	2.34
2nd	Tel Aviv University	Israel	25	2.02
3rd	Massachusetts General Hospital	United States	22	1.78
3rd	Jinling Hospital	China	22	1.78
5th	UNSW Sydney	Australia	21	1.70
6th	Harvard Medical School	United States	20	1.62
7th	University of Glasgow	United Kingdom	19	1.54
7th	Sydney Children’s Hospital, Randwick	Australia	19	1.54
9th	Medical School of Nanjing University	China	18	1.46
9th	University of Washington	United States	18	1.46

Table 3 Top 10 funding agencies involved in nutrition and Crohn’s disease from 2002 to 2021

Ranking	Funding agencies	Country	No. of publication	%
1st	National Institute of Diabetes and Digestive and Kidney Diseases	United States	34	2.75
2nd	National Institutes of Health	United States	30	2.43
2nd	The National Natural Science Foundation of China	China	30	2.43
4th	Crohn’s and Colitis Foundation	United States	20	1.62
5th	Medical Research Council	United Kingdom	16	1.29
6th	AbbVie	United States	12	0.97
6th	National Cancer Institute	United States	12	0.97
8th	Canadian Institutes of Health Research	Canada	10	0.81
9th	Japan Society for the Promotion of Science	Japan	10	0.81
8th	National Center for Research Resources	United States	10	0.81
8th	Nestlé Health Science	Switzerland	10	0.81
8th	Pfizer	United States	10	0.81

Table 4 Ten most productive journals involved in nutrition and Crohn’s disease from 2002 to 2021

Ranking	Journal/source title	No. of documents	%	IF1
1st	Nutrients	57	4.61	6.706
2nd	Inflammatory Bowel Diseases	55	4.45	7.290
3rd	Alimentary Pharmacology and Therapeutics	39	3.15	9.524
4th	Clinical Nutrition	29	2.34	7.643
4th	Journal of Pediatric Gastroenterology and Nutrition	29	2.34	3.288
6th	Digestive Diseases and Sciences	24	1.94	3.487
7th	Journal of Crohns and Colitis	22	1.78	10.020
7th	World Journal of Gastroenterology	22	1.78	5.374
9th	Gastroenterology	17	1.37	33.883
9th	Nutrition in Clinical Practice	17	1.37	3.204

¹Journal Citation Reports (Clarivate, 2022). IF: Impact index.

Table 5 Top 10 articles on total citations

Ranking	Title	Source title	Cited by	Impact index per article1	Ref.
1st	“Dietary intake and risk of developing inflammatory bowel disease: A systematic review of the literature”	American Journal of Gastroenterology	603	29.2	Hou et al[31], 2011
2nd	“Inflammation, Antibiotics, and Diet as Environmental Stressors of the Gut Microbiome in Pediatric Crohn’s Disease”	Cell Host and Microbe	449	70.6	Lewis et al[37], 2015
3rd	“Diet-induced dysbiosis of the intestinal microbiota and the effects on immunity and disease”	Nutrients	425	36.5	Brown et al[32], 2012
4th	“Differentiating ulcerative colitis from Crohn disease in children and young adults: Report of a Working Group of the North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition and the Crohn’s and Colitis Foundation of America”	Journal of Pediatric Gastroenterology and Nutrition	377	21.3	North American Society for Pediatric Gastroenterology, Hepatology, and Nutrition[33], 2007
5th	“Enteral nutritional therapy for induction of remission in Crohn’s disease”	Cochrane Database of Systematic Reviews	371	10.4	Zachos et al[34], 2007
6th	“A prospective study of long-term intake of dietary fiber and risk of Crohn’s disease and ulcerative colitis”	Gastroenterology	358	38.1	Ananthakrishnan et al[39], 2013
7th	“Polymeric Diet Alone Versus Corticosteroids in the Treatment of Active Pediatric Crohn’s Disease: A Randomized Controlled Open-Label Trial”	Clinical Gastroenterology and Hepatology	342	18.4	Borrelli et al[38], 2006
8th	“ESPEN guideline: Clinical nutrition in inflammatory bowel disease”	Clinical Nutrition	341	48.9	Forbes et al[35], 2017
9th	“Western diet induces dysbiosis with increased e coli in CEABAC10 mice, alters host barrier function favouring AIEC colonization”	Gut	336	38.4	Martinez-Medina et al[40], 2014
10th	“Fine and ultrafine particles of the diet: Influence on the mucosal immune response and association with Crohn’s disease”	Proceedings of the Nutrition Society	310	13.3	Lomer et al[36], 2002

¹The impact index per article is presented based on Reference Citation Analysis (https://referencecitationanalysis.com/).