Intest Res.  2015 Jan;13(1):60-67. 10.5217/ir.2015.13.1.60.

Old Age at Diagnosis Is Associated With Favorable Outcomes in Korean Patients With Inflammatory Bowel Disease

• Choi JH
• Kim ES
• Cho KB
• Park KS
• Lee YJ
• Lee SM
• Kang YJ
• Jang BI
• Kim KO
• Daegu-Gyeongbuk Gastrointestinal Study Group (DGSG)

• KMID: 1807377
• DOI: http://doi.org/10.5217/ir.2015.13.1.60

Abstract

BACKGROUND/AIMS
Despite the rising incidence and prevalence of inflammatory bowel disease (IBD) in Asian populations, data regarding clinical characteristics of patients in Asia based on age at diagnosis are relatively sparse. The aim of this study was to compare clinical characteristics based on the age at diagnosis according to the Montreal Classification in Korean IBD patients.
METHODS
We recruited consecutive patients with IBD at two tertiary hospitals and retrospectively reviewed their medical information. Patients were divided into three groups according to their age at diagnosis: youth (<17 years), young adult (17-40 years), and middle-old (>40 years). The main clinical characteristics for comparison were the achievement of a remission state at the last follow-up visit, cumulative rate of surgery, and cumulative use of immunomodulators and tumor necrosis factor-alpha (TNFalpha) blockers during the follow-up period.
RESULTS
In total, 346 IBD patients were included (Crohn's disease [CD] 146 and ulcerative colitis 200; 36 youth, 202 young adult, and 113 middle-old). The middle-old group with CD was characterized by a predominance of uncomplicated behavior (P=0.013) and a lower frequency of perianal disease (P=0.009). The middle-old group was associated more with a less aggressive disease course than the younger group, as shown by more frequent remission (P=0.004), being less likely to undergo surgery (P<0.001), and lower cumulative use of immunomodulators and TNFalpha blockers (P<0.001).
CONCLUSIONS
Age at diagnosis according to the Montreal Classification is an important prognostic factor for Korean IBD patients.

Keyword

Inflammatory bowel diseases; Age of onset; Prognosis; Crohn disease; Colitis, ulcerative

MeSH Terms

Adolescent
Age of Onset
Asia
Asian Continental Ancestry Group
Classification
Colitis, Ulcerative
Crohn Disease
Diagnosis*
Follow-Up Studies
Humans
Immunologic Factors
Incidence
Inflammatory Bowel Diseases*
Prevalence
Prognosis
Retrospective Studies
Tertiary Care Centers
Tumor Necrosis Factor-alpha
Young Adult
Immunologic Factors
Tumor Necrosis Factor-alpha

Figure

• 

  Fig. 1 The age distribution of IBD at diagnosis. Showing a bimodal distribution with the two peaks corresponding to the characterizations of early-onset and late-onset UC. The two peak ages were in the third and sixth decade of life. In CD, however, we did not find a second peak.

• 

  Fig. 2 Comparison of duration from diagnosis to disease outcomes between different age groups. (A) Younger group patients were more likely to require surgery earlier than those in the middle-old group (150.4±31.7, 288.8±18.6, and 303.5±7.1 months, mean±SD; P<0.001). (B) Younger group patients were more likely to require earlier use of immunomodulators than those in the middle-old group (58.0±12.3, 116.0±13.6, and 187.5±19.6 months, mean±SD; P<0.001). (C) Younger group patients were more likely to require earlier use of tumor necrosis factor-α blockers than those in the middle-old group (118.7±13.8, 275.9±18.9, and 270.4±9.9 months, mean±SD; P<0.001).

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