Table 4.

Patient characteristics of the total population and of patients with an open abdominal wall

	Total population		Open abdomen
Variable	N	%	N	%
Patients	135	100	53	100
Number of fistulas	163	NA	60	NA
Age (years)
< 60	67	49.6	22	41.5
≥ 60	68	50.4	31	58.5
Sex
Male	65	48.1	31	58.5
Female	70	51.9	22	41.5
Patient origin
azM surgical department	82	60.7	30	56.6
Other	53	39.3	23	43.4
Primary disease
Miscellaneous	81	60	37	69.8
IBD	24	17.8	5	9.4
Malignancy	30	22.2	11	20.8
Cause of fistula
Surgical	119	88.1	51	96.2
Spontaneous	16	11.9	2	3.8
Anatomy of fistula
Small bowel	104	77.0	47	88.7
Large bowel	26	19.3	5	11.3
Output (ml/day)
< 500	56	41.5	15	28.3
≥ 500	61	45.2	31	58.5
Abdominal wall
Open	53	39.3	NA	NA
Closed	82	60.7	NA	NA
Sepsis
Yes	73	54.1	31	58.5
No	62	45.9	22	41.5
Only TPN
Yes	82	60.7	33	62.3
No	53	39.3	20	37.7
Recurrence
Yes	18	13.3	9	17.0
No	117	86.7	44	83.0
Preoperative albumin (g/l)
< 25	25	24.3a	14	28.6b
≥ 25	62	60.2a	24	49.0b

^aPercentage of total number initial surgical restorative procedures (103)

^bPercentage of total number initial surgical restorative procedures (49)

azM University Hospital Maastrict; IBD inflammatory bowel disease; TPN total parenteral nutrition