Table 2.
Relationship between direct costs and study characteristics (robust linear regression)
| Estimate | Standard error | |
|---|---|---|
| Constant | 2,133 | 1773.922 |
| GDP per capita ($) | 0.045** | 0.017 |
| Estimation approach | ||
| Sum-all medical | Ref. | |
| Sum-diagnosis-specific | −413.880 | 528.766 |
| RB/matching | −719.868 | 526.896 |
| Survey | −689.806 | 671.020 |
| At least four costing components | 702.966* | 403.968 |
| USA study | 3,111.067*** | 533.534 |
| Year of study | ||
| <1995 | Ref. | |
| 1995–1999 | −1,744.799 | 1632.498 |
| 2000–2004 | −816.647 | 1586.966 |
| 2005–2009 | −1,021.685 | 1592.595 |
| 2010–2014 | −2,744.739 | 1839.689 |
| Study representative | −598.670 | 409.070 |
| Complications | 666.803 | 414.727 |
| R-squared adj. | 0.559 | |
| N | 70 | |
Ref. reference category
*** p < 0.01, ** p < 0.05, * p < 0.1