Abstract
Background
Previous research has yielded conflicting data as to whether the natural history of inflammatory bowel disease follows a seasonal pattern. The purpose of this study was (1) to determine whether the frequency of onset and relapse of inflammatory bowel disease follows a seasonal pattern and (2) to establish a model to predict the frequency of onset, relapse, and severity of inflammatory bowel disease (IBD) with meteorological data based on artificial neural network (ANN).
Method
Patients with diagnosis of ulcerative colitis (UC) or Crohn’s disease (CD) between 2003 and 2011 were investigated according to the occurrence of onset and flares of symptoms. The expected onset or relapse was calculated on a monthly basis over the study period. For artificial neural network (ANN), patients from 2003 to 2010 were assigned as training cohort and patients in 2011 were assigned as validation cohort. Mean square error (MSE) and mean absolute percentage error (MAPE) were used to evaluate the predictive accuracy.
Results
We found no seasonal pattern of onset (P = 0.248) and relapse (P = 0.394) among UC patients. But, the onset (P = 0.015) and relapse (P = 0.004) of CD were associated with seasonal pattern, with a peak in July and August. ANN had average accuracy to predict the frequency of onset (MSE = 0.076, MAPE = 37.58 %) and severity of IBD (MSE = 0.065, MAPE = 42.15 %) but high accuracy in predicting the frequency of relapse of IBD (MSE = 0.009, MAPE = 17.1 %).
Conclusion
The frequency of onset and relapse in IBD showed seasonality only in CD, with a peak in July and August, but not in UC. ANN may have its value in predicting the frequency of relapse among patients with IBD.
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Abbreviations
- ANN:
-
Artificial neural network
- M/T:
-
Medical expense/total expense
- MSE:
-
Mean square error
- MAPE:
-
Mean absolute percentage error
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Acknowledgments
This work was supported by grants from the National Science Foundation of China (No. 81470820 and No. 81370508).
Conflict of interest
The authors declare that they have no competing interests.
Authors’ contribution
Jiang Chen Peng did the statistical work and wrote the paper.
Zhi Hua Ran collected the data and did the statistical work.
Jun Shen designed and checked the paper.
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Our study aims to find seasonal variation of IBD frequency in Shanghai and establish artificial neural network to predict the onset and relapse frequency of IBD in Shanghai.
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Peng, J.C., Ran, Z.H. & Shen, J. Seasonal variation in onset and relapse of IBD and a model to predict the frequency of onset, relapse, and severity of IBD based on artificial neural network. Int J Colorectal Dis 30, 1267–1273 (2015). https://doi.org/10.1007/s00384-015-2250-6
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DOI: https://doi.org/10.1007/s00384-015-2250-6