Table A2.
Results of generalized linear model for costs of infusion reactions (IRs)
| Independent variable | Coefficient | SE | P value |
| IRs requiring hospitalization or ER visit | 1.113 | 0.172 | 0.000 |
| IRs without hospitalization or ER visit | 0.321 | 0.082 | 0.000 |
| Male | 0.029 | 0.031 | 0.351 |
| Age | −0.009 | 0.002 | 0.000 |
| Geographic region | |||
| Northeast | 0.090 | 0.059 | 0.126 |
| North central | −0.003 | 0.046 | 0.940 |
| South (reference) | |||
| West | 0.018 | 0.047 | 0.698 |
| Urban location | 0.078 | 0.040 | 0.051 |
| Year of first infusion | |||
| 2004/2005 (reference) | |||
| 2006 | −0.013 | 0.029 | 0.643 |
| Type of health insurance | |||
| Comprehensive FFS (reference) | |||
| HMO | 0.178 | 0.063 | 0.005 |
| PPO | 0.207 | 0.058 | 0.000 |
| POS | 0.262 | 0.083 | 0.002 |
| Other | 0.100 | 0.059 | 0.091 |
| Clinical characteristics | |||
| Deyo–Charlson comorbidity index | 0.016 | 0.005 | 0.001 |
| Colon (versus rectal) cancer | −0.019 | 0.034 | 0.572 |
| History of allergy | −0.002 | 0.044 | 0.967 |
| Concomitant platinum use | 0.016 | 0.031 | 0.610 |
| First infusion | 0.367 | 0.030 | 0.000 |
| Model constant | 8.646 | 0.124 | 0.000 |
ER, emergency room; FFS, fee-for-service; HMO, health maintenance organization; PPO, preferred provider organization; POS, point of service; SE, standard error.