Risk factors include: 1) age (most people are diagnosed in their 20s - 30s), 2)
race or ethnicity (Caucasians have the highest risk, but IBD can occur in any
race; there's an even higher risk if you are of Ashkenazi
Jewish descent), 3) family history (risk is higher if a close relative has the disease), 4) cigarette smoking (the most important controllable risk factor for developing CD), 5) nonsteroidal anti-inflammatory medications (includes ibuprofen [Advil, Motrin IB, others], naproxen sodium [Aleve], diclofenac sodium [Voltaren], and others), and 6) where you live (you are more likely to develop IBD if you live in an industrialized country).