In addition, a multivariate Cox regression analysis, including type of IBD, concurrent primary sclerosing cholangitis, age at CRC diagnosis, and co-morbidity as co-variables confirmed the association between colonoscopic surveillance and improved survival with reduced CRC-related mortality; however, this did not reach statistical significance ( P =0.10) ( Table 2 ).
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Colonoscopic surveillance improves survival after colorectal cancer diagnosis in inflammatory bowel disease.
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The multivariate analysis confirmed the association between colonocopic surveillance and improved survival, but failed to reach statistical significance most probably because of a type II error resulting from multiple variables in the analysis ( Table 2 ).
This difference showed a trend but was not statistically significant ( P =0.08).