Table 1

Prospective codification of one individual in a calendar year

Activity and treatmentN
Disease activity
 Quiescent (no symptoms)0
 Minor symptoms without flare1
 Mild symptoms2
 Flare-up or chronic active disease3
 CD-related hospitalisation4
 Abdominal surgery for active CD or complication5
Maximal treatment received during the year
 No treatment for CD0
 5-amino-salicylates or antibiotics for CD1
 Low dose steroids (<10 mg Prednisone per day)2
 Anti-TNF agents5
  • CD, Crohn's disease; TNF, tumour necrosis factor.