Incidence trends and predictors for cost and average lengths of stay in colorectal cancer surgery

Table 3 Logistic regression model for colorectal cancer surgery during periods 1-3¹

Variables		P1 (n = 118)	P2 (n = 273)	P3 (n = 387)	OR (95%CI)
Gender	Female	35.59	44.69	40.31	1.13 (1.01-1.25)
	Male	64.41	55.31	59.69	0.93 (0.83-1.06)
Age (yr)	≤ 30	1.69	1.47	0.78	0.46 (0.33-0.60)
	31-40	2.54	3.30	2.84	1.12 (0.96-1.28)
	41-50	5.93	10.62	6.72	1.13 (0.99-1.27)
	51-60	16.10	20.88	28.68	1.78 (1.58-1.97)
	61-70	35.59	28.94	25.06	0.71 (0.56-0.87)
	71-80	31.36	27.47	27.65	0.88 (0.73-1.03)
	≥ 81	6.78	7.33	8.27	1.22 (1.06-1.37)
Source	Health examination	0.85	4.03	4.91	5.78 (5.48-6.08)
	Inpatient or emergency room	99.15	95.97	95.09	0.96 (0.74-1.18)
Surgical type	Low anterior resection	35.59	25.64	0.62	0.02 (0.00-0.04)
	High anterior resection	3.39	2.2	18.60	5.49 (5.19-5.82)
	Abdominoperineal resection	2.54	4.03	9.56	3.76 (3.54-3.99)
	Right hemicolectomy	20.34	25.64	23.51	1.16 (1.00-1.36)
	Left hemicolectomy	14.41	12.09	11.63	0.81 (0.61-1.05)
	Super low anterior resection	21.19	24.18	12.14	0.57 (0.38-0.76)
	Endoscopic polypectomy	2.54	6.23	2.58	0.31 (0.05-1.77)
Pathologic differentiation	Well	14.41	9.89	10.85	0.75 (0.51-0.92)
	Moderate	77.97	82.78	82.69	1.06 (0.82-1.27)
	Poor	7.63	7.33	6.46	0.85 (0.59-1.05)
Chemotherapy	No	52.54	38.1	52.20	0.99 (0.70-1.37)
	Yes	47.46	61.9	47.80	1.01 (0.80-1.28)
Distant metastasis	No	83.05	93.41	96.64	1.16 (1.05-1.31)
	Yes	16.95	6.59	3.36	0.20 (0.02-0.40)
Tumor site	Ascending colon	18.64	19.05	18.35	0.98 (0.75-1.19)
	Transverse colon	10.17	7.69	8.79	0.86 (0.70-1.06)
	Descending colon	6.78	6.96	6.20	0.91 (0.79-1.14)
	Sigmoid colon	22.88	35.16	40.05	1.75 (1.43-2.23)
	Rectum	41.53	31.14	26.61	0.64 (0.42-0.93)
Tumor stage	1	15.25	16.12	21.19	1.39 (1.12-1.74)
	2	38.98	35.16	38.24	0.98 (0.78-1.19)
	3	38.98	32.60	33.85	0.87 (0.56-1.14)
	4	6.78	6.12	6.72	0.99 (0.80-1.29)

¹Period 3 (P3) vs period 1 (P1) (reference group). P1: 2004-2005; P2: 2006-2007; P3: 2008-2009.