Intestinal Research

Jae Hyun Jang

2 Articles

Seasonal Variation in Flares of Inflammatory Bowel Disease in a Korean Population: Jae Hyun Jang, Su Hee Lee, Jun Mo Sung, Jung Ho Park, Hong Joo Kim, Yong Kyun Cho, Chong Il Sohn, Woo Kyu Jeon, Byung Ik Kim, Dong Il Park; Intest Res 2012;10(2):161-167. Published online April 30, 2012; DOI: https://doi.org/10.5217/ir.2012.10.2.161

Background/Aims
Conflicting data have been reported about the seasonal variation in flare-up of inflammatory bowel disease (IBD). The aim of this study was to assess the occurrence of seasonal variations in flare-up of IBD in the Korean population. Methods: Patients with IBD, who underwent more than 1 year of follow-up and showed more than 1 episode of flare-up, were included. Flares of disease were refined as follows; receipt of a new prescription and increasing dose of corticosteroids, 5-ASA or immunosuppressant; hospitalized or operated due to development and worsening of symptoms; elevation of inflammatory marker due to worsening of Crohn's Disease Activity Index (CDAI) or Mayo score. In addition, for patients with more than two episodes of flare-up, they were investigated in a monthly and seasonal pattern. Results: Of 573 patients with IBD, 46 patients with Crohn's disease and 61 patients with ulcerative colitis were enrolled. There was no association between month of the year and flare of Crohn's disease (P=0.06) or ulcerative colitis (P=0.58). Further, no association between season of the year and flare of Crohn's disease (P=0.06) or ulcerative colitis (P=0.68). However, in Crohn's disease who experience 2 or more flare-ups, symptoms occurred more frequently during winter, especially December (P=0.029). Conclusions: In the Korean population, there was no association of seasonal and monthly variation in flares of Crohn's disease and ulcerative colitis. However, in Crohn's disease, individuals with 2 flar-up or more, symptoms occurred more frequently during December. (Intest Res 2012;10: 0-167)

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Old Age at Diagnosis Is Associated With Favorable Outcomes in Korean Patients With Inflammatory Bowel Disease
Jae Hyuk Choi, Eun Soo Kim, Kwang Bum Cho, Kyung Sik Park, Yoo Jin Lee, Sang Min Lee, Yu Jin Kang, Byung Ik Jang, Kyeong Ok Kim
Intestinal Research.2015; 13(1): 60. CrossRef

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Usefulness of Polyp Detection Rate as a Quality Indicator in Colonoscopy: Su Hee Lee, Dong Il Park, Jun Mo Sung, Jae Hyun Jang, Seung Ho Ryu, Young Ho Kim, Suck-Ho Lee, Chang Kyun Lee, Chang Soo Eun, Dong Soo Han; Intest Res 2011;9(2):105-111. Published online August 30, 2011; DOI: https://doi.org/10.5217/ir.2011.9.2.105

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Background/Aims
The adenoma detection rate (ADR) has been proposed as a quality indicator of colonoscopy; however, ADR cannot be measured easily with commonly used endoscopy reporting systems because substantial time and effort is required to acquire data from histologic assessments. The purpose of this study was to determine if polyp detection rate (PDR) could be used as a valid proxy for ADR. Methods: A total of 1,156 consecutive, asymptomatic, individuals of average risk between 50 and 75 years-of-age who underwent screening colonoscopies at four tertiary medical centers by 27 gastroenterologists were included in this study. Each individual endoscopist performed at least 10 colonoscopies during the study period. The ADR and PDR were calculated as the proportion of an endoscopist's cases with an adenoma or polyp divided by the total number of colonoscopies. Pearson's correlation coefficient and the intraclass correlation coefficient were used to determine the level of agreement between ADR and PDR. Results: The mean PDR and ADR for endoscopists was 47.4% (range, 21.7-75.0) and 36.5% (range, 13.0-66.7), respectively. There was a strong correlation between PDR and ADR (Pearson's correlation coefficient 0.94, P＜0.001) and there was also good agreement between performance quintiles defined by ADR and PDR (intraclass correlation coefficient 0.94, P＜0.001). Conclusions: PDR is a valid proxy for ADR and may be useful for quality assurance at centers where ADR cannot be easily measured. (Intest Res 2011;9:105-111)

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Usefulness of Polyp and Adenoma Detection Rate in the Proximal and Distal Colon
Sung Youn Choi, Dong Il Park, Chang Kyun Lee, Jae Myung Cha, Suck Ho Lee, Young Whangbo, Chang Soo Eun, Dong Soo Han, Bo In Lee, Jeong Eun Shin
The Korean Journal of Gastroenterology.2014; 63(1): 11. CrossRef
Correlation between Adenoma Detection Rate and Advanced Adenoma Detection Rate
Shin Yeoung Lee, Nam Hee Kim, Hyun Beom Chae, Ki Joong Han, Tae Hoon Lee, Choel Min Jang, Kyung Mo Yoo, Yoon Suk Jung, Jung Ho Park, Hong Joo Kim, Yong Kyun Cho, Chong Il Sohn, Woo Kyu Jeon, Byung Ik Kim, Dong Il Park
The Korean Journal of Gastroenterology.2014; 64(1): 18. CrossRef
The Correlation between Polyp Detection Rate and Adenoma Detection Rate: Mainly Determined by the Colon Segment
Geom Seog Seo
The Korean Journal of Gastroenterology.2014; 63(1): 1. CrossRef

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