Predictive value of Hajibandeh index in determining peritoneal contamination in acute abdomen: A cohort study and meta-analysis

Table 1 Baseline characteristics of the included studies and included population

	Current study	Hajibandeh 2021	Hajibandeh 2020	Hajibandeh 2020	Meta-analysis
Country	United Kingdom	United Kingdom	United Kingdom	United Kingdom	United Kingdom
Journal	-	Int J Colorectal Dis	J Perioper Pract	J Perioper Pract	-
Design	Retrospective cohort	Prospective cohort	Retrospective cohort	Retrospective cohort	Meta-analysis
Number of patients	700	269	234	234	1437
Description of included patients	Patients undergoing emergency laparotomy	Patients undergoing emergency laparotomy	Patients undergoing emergency laparotomy	Patients undergoing emergency laparotomy	Patients undergoing emergency laparotomy
Age, mean (95%CI)	63 (62-65)	64 (62-66)	60.2 (58-62)	62(60-65)	63 (62-64)
Male, n (%)	261 out of 700 (37%)	123 out of 269 (46%)	100 out of 234 (43%)	106 out of 234 (45%)	590 out of 1437 (41%)
Female, n (%)	439 out of 700 (63%)	146 out of 269 (54%)	134 out of 234 (57%)	128 out of 234 (55%)	847 out of 1437 (59%)
ASA, n (%)
1	35 out of 700 (5%)	9 out of 269 (3%)	23 out of 234 (10%)	33 out of 234 (14%)	100 out of 1437 (7%)
2	245 out of 700 (35%)	54 out of 269 (20%)	85 out of 234 (36%)	76 out of 234 (33%)	460 out of 1437 (32%)
3	273 out of 700 (39%)	158 out of 269 (59%)	94 out of 234 (40%)	78 out of 234 (33%)	603 out of 1437 (42%)
4	131 out of 700 (19%)	43 out of 269 (16%)	30 out of 234 (13%)	40 out of 234 (17%)	244 out of 1437 (17%)
5	16 out of 700 (2%)	5 out of 269 (2%)	2 out of 234 (1%)	7 out of 234 (3%)	30 out of 1437 (2%)
Indication for laparotomy, n (%)
Small bowel obstruction	270 out of 700 (39%)	94 out of 269 (35%)	88 out of 234 (38%)	84 out of 234 (36%)	536 out of 1437 (37%)
Large bowel obstruction	81 out of 700 (11%)	34 out of 269 (13%)	39 out of 234 (17%)	28 out of 234 (12%)	182 out of 1437 (13%)
Perforated peptic ulcer	34 out of 700 (5%)	27 out of 269 (10%)	23 out of 234 (10%)	28 out of 234 (12%)	112 out of 1437 (8%)
Small bowel perforation	43 out of 700 (6%)	10 out of 269 (4%)	14 out of 234 (6%)	11 out of 234 (5%)	78 out of 1437 (5%)
Colonic perforation	110 out of 700 (16%)	47 out of 269 (17%)	36 out of 234 (15%)	42 out of 234 (18%)	235 out of 1437 (16%)
Intestinal ischaemia	54 out of 700 (8%)	25 out of 269 (9%)	5 out of 234 (2%)	8 out of 234 (3%)	92 out of 1437 (6%)
Intraabdominal collection	31 out of 700 (4%)	4 out of 269 (2%)	12 out of 234 (5%)	18 out of 234 (8%)	65 out of 1437 (5%)
Colitis	26 out of 700 (4%)	5 out of 269 (2%)	0 out of 234 (0%)	2 out of 234 (1%)	33 out of 1437 (2%)
Anastomotic leak	28 out of 700 (4%)	3 out of 269 (1%)	4 out of 234 (2%)	4 out of 234 (2%)	39 out of 1437 (3%)
Other	23 out of 700 (3%)	20 out of 269 (7%)	13 out of 234 (5%)	9 out of 234 (3%)	65 out of 1437 (5%)
Intraperitoneal contamination, n (%)	222 out of 700 (32%)	67 out of 269 (25%)	72 out of 234 (31%)	62 out of 234 (27%)	423 out of 1437 (29%)
Purulent contamination, n (%)	126 out of 700 (18%)	17 out of 269 (6%)	44 out of 234 (19%)	32 out of 234 (14%)	219 out of 1437 (15%)
Feculent contamination, n (%)	96 out of 700 (14%)	50 out of 269 (19%)	28 out of 234 (12%)	30 out of 234 (13%)	204 out of 1437 (14%)
Preoperative HI, median (IQR)	19.01 (3.89-87.28)	25.2 (4.5–121.1)	23.3 (3.6–130.4)	32.2 (4.9–144.3)	21.3 (4.2-117.9)

CI: Confidence interval; ASA: American Society of Anesthesiologists; HI: Hajibandeh index; IQR: Interquartile range.