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

Table 1 Patient characteristics (n = 778)

Variable	n (%)
Gender
Female	320 (41.13)
Male	458 (58.87)
Age (yr)	64.53 ± 12.33
≤ 30	9 (1.16)
31-40	23 (2.96)
41-50	62 (7.97)
51-60	187 (24.04)
61-70	218 (28.02)
71-80	219 (28.15)
≥ 81	60 (7.71)
Source
Health examination	31 (3.98)
Inpatient or emergency room	747 (96.02)
Surgical type
Low anterior resection	197 (25.32)
High anterior resection	82 (10.54)
Abdominoperineal resection	51 (6.56)
Right hemicolectomy	185 (23.78)
Left hemicolectomy	95 (12.2)
Super low anterior resection	138 (17.74)
Endoscopic polypectomy	30 (3.86)
Tumor number	1.05 ± 0.29
Tumor size	5.06 ± 2.14
No. of lymph node metastases	3.56 ± 5.15
Pathologic differentiation
Well	86 (11.05)
Moderate	638 (82.01)
Poor	54 (6.94)
Chemotherapy
No	368 (47.30)
Yes	410 (52.70)
Distant metastasis
No	727 (93.44)
Yes	51 (6.56)
Tumor site
Ascending colon	145 (18.64)
Transverse colon	67 (8.61)
Descending colon	51 (6.56)
Sigmoid colon	278 (35.73)
Rectum	237 (30.46)
Tumor stage
1	144 (18.51)
2	290 (37.28)
3	266 (34.19)
4	78 (10.03)
Treatment cost (dollars)	128543.94 ± 85360.59
Average length of stay (d)	15.40 ± 8.12