Research Article
Trends in the Management of Intracranial Vascular Malformations in the USA from 2000 to 2007
Table 4
Determinants of hospital charges.
(a) |
| | Model 1 | Model 2 | | Unstd. Coefficients | Standard Error | Std. coefficients | t | P | Unstd. Coefficients B | Standard Error | Std. coefficients | t | P |
| Age (y) | 61.48 | 11.49 | 0.0200 | 5.3514 | 0.00000 | | | | | | Elective admission | 1763.74 | 424.92 | 0.0160 | 4.1508 | 0.00003 | | | | | | In-hospital death | 12044.56 | 1339.92 | 0.0317 | 8.9890 | 0.00000 | | | | | | Women | −669.94 | 351.65 | −0.0063 | −1.9052 | 0.05677 | | | | | | Length of stay () | 3613.12 | 28.99 | 0.5026 | 124.6288 | 0.00000 | 3412.81 | 22.53 | 0.4535 | 151.5009 | 0.00000 | # Diagnoses | −287.82 | 61.42 | −0.0199 | −4.6863 | 0.00000 | | | | | | # Procedures | 7049.92 | 118.25 | 0.2800 | 59.6181 | 0.00000 | 8824.37 | 92.78 | 0.3215 | 95.1101 | 0.00000 | Time (year) | 6169.46 | 232.79 | 0.0888 | 26.5024 | 0.00000 | 5677.02 | 137.73 | 0.1095 | 41.2199 | 0.00000 | Median income | 847.15 | 156.29 | 0.0177 | 5.4205 | 0.00000 | | | | | | ICrH | 2804.75 | 931.44 | 0.0182 | 3.0112 | 0.00260 | | | | | | ICA aneurysm, unruptured | 1300.84 | 1135.07 | 0.0039 | 1.1460 | 0.25179 | | | | | | Acute ischemia | 530.73 | 693.29 | 0.0026 | 0.7655 | 0.44397 | | | | | | Seizure | −60.35 | 414.97 | −0.0005 | −0.1454 | 0.88438 | | | | | | Headache | 1414.91 | 636.16 | 0.0082 | 2.2241 | 0.02615 | | | | | | Angiography | 1372.53 | 431.61 | 0.0124 | 3.1800 | 0.00147 | | | | | | Embolization | 29192.74 | 534.78 | 0.2086 | 54.5888 | 0.00000 | 29502.47 | 473.73 | 0.1707 | 62.2773 | 0.00000 | IVM surgery | 26550.75 | 608.40 | 0.1564 | 43.6403 | 0.00000 | 27449.01 | 488.44 | 0.1553 | 56.1973 | 0.00000 | Radiosurgery | 27182.37 | 1354.84 | 0.0682 | 20.0632 | 0.00000 | 16798.46 | 1122.82 | 0.0397 | 14.9609 | 0.00000 | Aneurysm clip | 27896.46 | 1678.19 | 0.0573 | 16.6230 | 0.00000 | 17164.04 | 1341.84 | 0.0338 | 12.7914 | 0.00000 | Ventilation | 12209.90 | 933.97 | 0.0518 | 13.0731 | 0.00000 | | | | | | ICrH primary diagn. | 3325.46 | 1054.94 | 0.0187 | 3.1523 | 0.00162 | | | | | | Seizure primary diagnosis | 1473.41 | 787.55 | 0.0068 | 1.8709 | 0.06137 | | | | | | Headache primary diagnosis | 921.68 | 1334.31 | 0.0025 | 0.6908 | 0.48972 | | | | | | Constant | −26640.78 | 1063.46 | | −25.0510 | 0.00000 | −17986.64 | 416.53 | | −43.1820 | 0.00000 |
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(b) |
| | Adjusted R square | df1 | df2 | Sig. F Change | Durbin-Watson |
| Model 1 | 0.6648 | 23 | 31610 | 0.0000 | 0.3258 | Model 2 | 0.6161 | 8 | 56205 | 0.0000 | 0.3172 |
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Abbreviations: Unstd.: unstandardized, Std.: standardized, #: number of, ICrH: intracranial hemorrhage, ICA: internal carotid artery, IVM: intracranial vascular malformation.
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