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Table 3 Relationships between major surgical complications and cost, reimbursement, total margin and length of stay, controlling for effects of age, gender, American Society of Anesthesiology score and body mass index a

From: The impact of complications following open colectomy on hospital finances: a retrospective cohort study

  Entire patient cohort (N = 276) Matched sample (n = 100)
Dependent variable Total cost Fixed cost Variable costs Reimbursement Total margin Length of stay (days) Total cost Fixed cost Variable costs Reimbursement Total margin LOS (days)
Complication $24,889b $15,610b $9,228b $12,326b -$12,563b 8.29b $26,269b $16,368b $9,846b $12,138b -$14,131b 8.456b
  (2,024) (1,246) (799) (1,272) (2,083) (0.607) (4,168) (2,566) (1,634) (2,175) (4,022) (1.116)
Age -$118 -$54 -$63 -$153 -$35 -0.135 $854 $572 $281 $16 -$838 0.256
  (393) (242) (155) (247) (404) (0.118) (1,498) (922) (587) (782) (1,445) (401)
Age-squared $1 $1 $1 $1 $0 0.001 -$8 -$6 -$3 $0 $8 -0.002
  (3) (2) (1) (2) (3) (0.001) (12) (7) (5) (6) (12) (0.003)
Female gender $2,047 $1,258 $796 -$578 -$2,625 0.493 $4,442 $2,698 $1,759 -$991 -$5,432 1.093
  (1,680) (1,034) (663) (1,056) (1,729) (0.504) (4,313) (2,655) (1,691) (2,251) (4,161) (1.154)
ASA score $2,598 $1,397 $1,200 $1,391 -$1,207 0.611 $2,272 $1,194 $1,074 -$159 -$2,430 0.411
  (1,758) (1,082) (694) (1,104) (1,809) (0.528) (4,755) (2,927) (1,864) (2,482) (4,588) (1.272)
BMI $53 $38 $16 -$110 -$163 0.006 -$51 -$17 -$34 -$208 -$158 -0.024
  (121) (75) (48) (76) (125) (0.036) (375) (231) (147) (196) (362) (0.100)
Constant $15,636 $9,791 $5,797 $27,531b $11,895 8.011c -$2,900 -$2,330 -$584 $31,214 $34,114 0.494
  (11,860) (7,298) (4,682) (7,450) (12,202) (3.559) (45,162) (27,804) (17,704) (23,573) (43,578) (12,090)c
Observations 276 276 276 276 276 276 100 100 100 100 100 100
R 2 0.3764 0.3835 0.3509 0.2733 0.1391 0.4290 0.3137 0.3197 0.2945 0.2600 0.1496 0.3928
  1. aASA: American Society of Anesthesiology; BMI: Body mass index; LOS: Length of stay. bP < 0.001. cP < 0.05. All values were obtained using multiple linear regression techniques as described in the Methods section. Values in parentheses are standard errors.