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 |