Methods of treating a subject with IBD with an anti-SMAD7 therapy,such as a SMAD7 antisense oligonucleotide, to reduce CRP levels are disclosed. Methods of treating and managing IBD in a subject using an anti-SMAD7 therapy, such as a SMAD7 antisense oligonucleotide, based on CRP levels are also disclosed. Also disclosed are methods of determining whether a subject with IBD is responsive or likely to be responsive to treatment an anti-SMAD7 therapy. Reduction of CRP levels may correlated with IBD remission or decreases in CDAI score.The present invention also relates to treatment of IBD using an anti-SMAD7 therapy (e.g., an antisense oligonucleotide) in combination with an additional agent. The invention also features related pharmaceutical compositions and kits.