Learning curve of enhanced recovery after surgery program in open colorectal surgery

Table 2 Patients’ characteristics and operative details

	Overall	1st quintile	2nd quintile	3rd quintile	4th quintile	5th quintile	P value
	(n = 380)	(n = 76)	(n = 76)	(n = 76)	(n = 76)	(n = 76)
Age (yr)	62.8 ± 12.7	60.9 ± 14.8	65.2 ± 11.2	63.7 ± 12.4	61.6 ± 12.9	62.4 ± 11.5	0.227
Male	206 (54)	43 (57)	40 (53)	41 (54)	44 (51)	38 (50)	0.877
BMI (kg/m2)	23.0 ± 4.1	23.7 ± 4.5	23.0 ± 3.8	23.2 ± 3.8	22.3 ± 4.2	23.1 ± 3.9	0.371
ASA classification ≥ 3	75 (20)	9 (12)	19 (25)	20 (26)	13 (17)	14 (18)	0.146
CR-POSSUM	1.80	1.77	1.88	1.75	1.80	1.90	0.675
Predicting mortality	(1.00-2.58)	(0.96-2.58)	(0.98-3.18)	(0.95-2.58)	(1.30-3.28)	(1.30-2.50)
Hematocrit (%)	36.8 ± 5.4	36.6 ± 5.5	36.1 ± 5.1	37.3 ± 5.5	37.4 ± 5.6	36.5 ± 5.3	0.548
Cancer surgery	347 (91)	70 (92)	68 (90)	69 (91)	71 (93)	69 (91)	0.930
Rectal surgery	165 (43)	34 (45)	30 (40)	39 (38)	40 (53)	32 (42)	0.397
Stoma formation	82 (22)	19 (25)	20 (26)	13 (17)	20 (26)	10 (13)	0.157
Multi-organ Resection1	36 (10)	9 (12)	10 (13)	5 (7)	9 (12)	3 (4)	0.227
Blood loss (mL)	150 (73-300)	200 (100-425)	200 (100-400)	150 (90-300)	150 (55-385)	140 (55-200)	0.067

Data are presented as mean ± SD, median (IQR) or number (percentage).

¹Multi-organ resection excluded the resection of appendix, gallbladder, ovaries and fallopian tubes, small bowel, and part of urinary bladder (partial cystectomy). ASA: American Society of Anesthesiologists; BMI: Body mass index; CR-POSSUM: ColoRectal Physiological and Operative Severity Score for the enUmeration of Mortality and Morbidity.