Table 1.
Patient characteristics
| Characteristics | CRC patients with IRs (n = 94) |
CRC patients without IRs (n = 1028) |
P value | ||
| Mean | SD | Mean | SD | ||
| Age, years | 57.5 | 11.1 | 61.6 | 11.8 | 0.001 |
| n | % | n | % | ||
| Male | 55 | 58.5 | 563 | 54.8 | 0.490 |
| Colon (versus rectum) | 63 | 67.0 | 718 | 69.8 | 0.572 |
| Urban (versus rural residence) | 77 | 81.9 | 875 | 85.1 | 0.408 |
| Geographic region | 0.257 | ||||
| Northeast | 3 | 3.2 | 98 | 9.5 | |
| North central | 31 | 33.0 | 324 | 31.5 | |
| South | 43 | 45.7 | 397 | 38.6 | |
| West | 17 | 18.1 | 208 | 20.2 | |
| Unknown | 0 | 0.0 | 1 | 0.1 | |
| Living in pollen-sensitive state | 26 | 27.7 | 202 | 19.6 | 0.062 |
| Allergy history | 15 | 16.0 | 134 | 13.0 | 0.412 |
| Insurance plan type | 0.059 | ||||
| Comprehensive FFS | 20 | 21.3 | 334 | 32.5 | |
| HMO | 17 | 18.1 | 157 | 15.3 | |
| PPO | 49 | 52.1 | 421 | 41.0 | |
| POS—capitated | 2 | 2.1 | 8 | 0.8 | |
| POS—non-capitated | 6 | 6.4 | 86 | 8.4 | |
| Other/unknown | 0 | 0 | 22 | 2.1 | |
| Concomitant platinum chemotherapies use | 41 | 43.6 | 470 | 45.7 | 0.696 |
CRC, colorectal cancer; FFS, fee-for-service; HMO, health maintenance organization; IR, infusion reaction; PPO, preferred provider organization; POS, point of service; SD, standard deviation.