"Patients with psoriatic arthritis who smoke have worse patient-reported disease features at baseline and don't respond as well as nonsmokers to anti-tumor necrosis factor (TNF) treatment, a Danish study found."
Patients who had stopped smoking more than 4 years before beginning treatment showed very similar rates of adherence to treatment as did those who had never smoked. So its never too late to quit smoking.
http://www.medpagetoday.com/Dermatology/Psoriasis/46969
Arthritis
Nikolay Nikolov, a rheumatologist and clinical team leader at the Food and Drug Administration (FDA), says that children with juvenile arthritis and their parents have reason to be optimistic. http://www.fda.gov/ForConsumers/ConsumerUpdates/ucm403578.htm
