**3.1 Population**

Our patients' demographic data is unremarkable: average weight, alcohol and tobacco habits, comorbidity, and concurrent medication appear to be similar to the general population of psoriasis patients. Only the sex ratio would seem to be non-standard: there are significantly less women than men in our series (13 vs 33). Even if it is not consistent with the general psoriasis sex ratio, it is in accordance with other infliximab case series.

For legal, and social security reimbursement reasons, we do not prescribe infliximab to children and adolescents; our youngest patient is aged 19 years. Subject to a safeguarded general condition, we did not set an upper limit; the oldest patient was aged 72.
