1. Cosnes J, Gower-Rousseau C, Seksik P, Cortot A. Epidemiology and natural history of inflammatory bowel diseases. Gastroenterology 2011;140:1785-1794.
3. Podolsky DK. Inflammatory bowel disease. N Engl J Med 2002;347:417-429.
4. Kucharzik T, Maaser C, Lügering A, Kagnoff M, Mayer L, Targan S, et al. Recent understanding of IBD pathogenesis: implications for future therapies. Inflamm Bowel Dis 2006;12:1068-1083.
5. Kim HJ, Hann HJ, Hong SN, Kim KH, Ahn IM, Song JY, et al. Incidence and natural course of inflammatory bowel disease in Korea, 2006-2012: a nationwide population-based study. Inflamm Bowel Dis 2015;21:623-630.
6. Lix LM, Graff LA, Walker JR, Clara I, Rawsthorne P, Rogala L, et al. Longitudinal study of quality of life and psychological functioning for active, fluctuating, and inactive disease patterns in inflammatory bowel disease. Inflamm Bowel Dis 2008;14:1575-1584.
7. Panara AJ, Yarur AJ, Rieders B, Proksell S, Deshpande AR, Abreu MT, et al. The incidence and risk factors for developing depression after being diagnosed with inflammatory bowel disease: a cohort study. Aliment Pharmacol Ther 2014;39:802-810.
8. Graff LA, Walker JR, Lix L, Clara I, Rawsthorne P, Rogala L, et al. The relationship of inflammatory bowel disease type and activity to psychological functioning and quality of life. Clin Gastroenterol Hepatol 2006;4:1491-1501.
9. Häuser W, Janke KH, Klump B, Hinz A. Anxiety and depression in patients with inflammatory bowel disease: comparisons with chronic liver disease patients and the general population. Inflamm Bowel Dis 2011;17:621-632.
10. Mikocka-Walus AA, Turnbull DA, Moulding NT, Wilson IG, Andrews JM, Holtmann GJ. Controversies surrounding the comorbidity of depression and anxiety in inflammatory bowel disease patients: a literature review. Inflamm Bowel Dis 2007;13:225-234.
11. Kovács Z, Kovács F. Depressive and anxiety symptoms, dysfunctional attitudes and social aspects in irritable bowel syndrome and inflammatory bowel disease. Int J Psychiatry Med 2007;37:245-255.
12. Walker JR, Ediger JP, Graff LA, Greenfeld JM, Clara I, Lix L, et al. The Manitoba IBD cohort study; a population-based study of the prevalence of lifetime and 12-month anxiety and mood disorders. Am J Gastroenterol 2008;103:1989-1997.
13. Nigro G, Angelini G, Grosso SB, Caula G, Sategna-Guidetti C. Psychiatric predictors of noncompliance in inflammatory bowel disease: psychiatry and compliance. J Clin Gastroenterol 2001;32:66-68.
14. Ananthakrishnan AN, Khalili H, Pan A, Higuchi LM, de Silva P, Richter JM, et al. Association between depressive symptoms and incidence of Crohn's disease and ulcerative colitis: results from the Nurses' Health Study. Clin Gastroenterol Hepatol 2013;11:57-62.
15. Goodhand JR, Wahed M, Mawdsley JE, Farmer AD, Aziz Q, Rampton DS. Mood disorders in inflammatory bowel disease: relation to diagnosis, disease activity, perceived stress, and other factors. Inflamm Bowel Dis 2012;18:2301-2309.
16. Mittermaier C, Dejaco C, Waldhoer T, Oefferlbauer-Ernst A, Miehsler W, Beier M, et al. Impact of depressive mood on relapse in patients with inflammatory bowel disease: a prospective 18-month follow-up study. Psychosom Med 2004;66:79-84.
17. Mikocka-Walus A, Knowles SR, Keefer L, Graff L. Controversies revisited: a systematic review of the comorbidity of depression and anxiety with inflammatory bowel diseases. Inflamm Bowel Dis 2016;22:752-762.
18. Larsson K, Lööf L, Rönnblom A, Nordin K. Quality of life for patients with exacerbation in inflammatory bowel disease and how they cope with disease activity. J Psychosom Res 2008;64:139-148.
20. Levenstein S, Prantera C, Varvo V, Scribano ML, Berto E, Andreoli A, et al. Psychological stress and disease activity in ulcerative colitis: a multidimensional cross-sectional study. Am J Gastroenterol 1994;89:1219-1225.
21. von Wietersheim J, Kessler H. Psychotherapy with chronic inflammatory bowel disease patients: a review. Inflamm Bowel Dis 2006;12:1175-1184.
23. Fuller-Thomson E, Sulman J. Depression and inflammatory bowel disease: findings from two nationally representative Canadian surveys. Inflamm Bowel Dis 2006;12:697-707.
24. Lennard-Jones JE. Classification of inflammatory bowel disease. Scand J Gastroenterol Suppl 1989;170:2-6. discussion 16-19.
26. Harvey RF, Bradshaw JM. A simple index of Crohn’s-disease activity. Lancet 1980;1:514
28. Löwe B, Gräfe K, Zipfel S, Witte S, Loerch B, Herzog W. Diagnosing ICD-10 depressive episodes: superior criterion validity of the Patient Health Questionnaire. Psychother Psychosom 2004;73:386-390.
29. Wittkampf KA, Naeije L, Schene AH, Huyser J, van Weert HC. Diagnostic accuracy of the mood module of the Patient Health Questionnaire: a systematic review. Gen Hosp Psychiatry 2007;29:388-395.
30. Gilbody S, Richards D, Barkham M. Diagnosing depression in primary care using self-completed instruments: UK validation of PHQ-9 and CORE-OM. Br J Gen Pract 2007;57:650-652.
31. Zigmond AS, Snaith RP. The hospital anxiety and depression scale. Acta Psychiatr Scand 1983;67:361-370.
32. Stern AF. The Hospital Anxiety and Depression Scale. Occup Med 2014;64:393-394.
33. Bjelland I, Dahl AA, Haug TT, Neckelmann D. The validity of the Hospital Anxiety and Depression Scale. An updated literature review. J Psychosom Res 2002;52:69-77.
34. Ganellen RJ, Matuzas W, Uhlenhuth EH, Glass R, Easton CR. Panic disorder, agoraphobia, and anxiety-relevant cognitive style. J Affect Disord 1986;11:219-225.
35. Uhlenhuth EH, McCarty T, Paine S, Warner T. The revised Anxious Thoughts and Tendencies (AT&T) scale: a general measure of anxietyprone cognitive style. J Affect Disord 1999;52:51-58.
41. Porcelli P, Leoci C, Guerra V. A prospective study of the relationship between disease activity and psychologic distress in patients with inflammatory bowel disease. Scand J Gastroenterol 1996;31:792-796.
42. Simrén M, Axelsson J, Gillberg R, Abrahamsson H, Svedlund J, Björnsson ES. Quality of life in inflammatory bowel disease in remission: the impact of IBS-like symptoms and associated psychological factors. Am J Gastroenterol 2002;97:389-396.
43. Han SW, McColl E, Barton JR, James P, Steen IN, Welfare MR. Predictors of quality of life in ulcerative colitis: the importance of symptoms and illness representations. Inflamm Bowel Dis 2005;11:24-34.
44. Quality of life of patients with ulcerative colitis: past, present, and future. Inflamm Bowel Dis 2008;14:554-565.
45. Pierce GL, Kalil GZ, Ajibewa T, Holwerda SW, Persons J, Moser DJ, et al. Anxiety independently contributes to elevated inflammation in humans with obesity. Obesity (Silver Spring) 2017;25:286-289.
46. Ma J, Xiao L. Obesity and depression in US women: results from the 2005-2006 National Health and Nutritional Examination Survey. Obesity (Silver Spring) 2010;18:347-353.
47. adalla TM. Association of obesity with mood and anxiety disorders in the adult general population. Chronic Dis Can 2009;30:29-36.
48. Goh J, O’Morain CA. Review article: nutrition and adult inflammatory bowel disease. Aliment Pharmacol Ther 2003;17:307-320.
50. Beaulieu DB, Kane S. Inflammatory bowel disease in pregnancy. Gastroenterol Clin North Am 2011;40:399-413. ix.
51. Yang YX, Lichtenstein GR. Corticosteroids in Crohn’s disease. Gastroenterol 2002;97:803-823.
52. Warrington TP, Bostwick JM. Psychiatric adverse effects of corticosteroids. Mayo Clin Proc 2006;81:1361-1367.
53. Khawaja NG, Dyer EJ. Anxious Thoughts and Tendencies Scale: an investigation of factor structure and the psychometric properties on the basis of an Australian sample. J Affect Disord 2004;79:217-221.
54. Lee SY, Kim JH, Kim YR, Gang EH, Lee DS, Yu BH. Effect of short-term treatment of paroxetine on psychological states in panic disorder. J Korean Neuropsychiatr Assoc 2004;43:312-319.