Development of a prognostic model for one-year surgery risk in Crohn’s disease patients: A retrospective study

Table 1 Patient baseline characteristics

Characteristic	n (%)/mean ± SD
Male/female	738/264 (73.65/26.35)
Age at diagnosis (yr)	28.41 ± 11.05
Drinking/not drinking	58/944 (5.79/94.21)
Smoking/not smoking	150/852 (14.97/85.03)
Body mass index at diagnosis (kg/m2)	18.58 ± 2.90
Year of follow-up (mo)	53.54 ± 13.10
Montreal classification
Age at diagnosis (%)
A1	119 (11.88)
A2	744 (74.25)
A3	139 (13.87)
Location at diagnosis
L1	145 (14.47)
L2	104 (10.38)
L3	678 (67.66)
L4	75 (7.49)
Behavior at diagnosis
B1	614 (61.28)
B2	185 (18.46)
B3	203 (20.26)
CRP at diagnosis	19.84 ± 24.25
ESR at diagnosis	34.58 ± 28.48
Alb at diagnosis	39.14 ± 25.65
Previous perianal surgery	299 (29.84)
Previous intestinal surgery	409 (40.82)
Complication	287 (28.64)
Stenosis	129 (12.87)
Perforation	139 (13.87)
GI bleeding	19 (1.90)
Treatment
5-aminosalicylic acid	202 (20.16)
Immunosuppressants	746 (74.45)
Corticosteroids	529 (52.79)
Biologics	462 (46.11)
EEN	230 (22.95)
Surgery within 1 yr after diagnosis	243(24.25)
Surgery within the follow-up period	473 (47.21)

CRP: C-reactive protein; ESR: Erythrocyte sedimentation rate; Alb: Albumin; GI: Gastrointestinal; EEN: Exclusive enteral nutrition.