Potential predictors of wait times between referral and performance of colonoscopy in 367 patients diagnosed as having colorectal cancer during June 2001 to June 2007: results of multivariable quantile regression
| Independent variable | N (%) | Median time | Coefficient | SE | p Value |
| No of clues | |||||
| 1 clue | 166 (45.2) | 54.5 | Referent | ||
| 2 clues | 145 (39.5) | 83.0 | 1.0000 | 3.3057 | 0.76 |
| 3 clues | 46(12.5) | 36.5 | −21.0000 | 4.8109 | <0.0001 |
| 4+ clues | 10 (2.7) | 4.0 | 0.0000 | 9.4250 | 1.00 |
| Inpatient | |||||
| Yes | 84 (22.9) | 2.0 | Referent | ||
| No | 283 (77.1) | 84.0 | 55.6704 | 6.5823 | <0.0001 |
| Urgency marked | |||||
| Routine | 184 (50.1) | 107.5 | Referent | ||
| Next available | 16 (4.4) | 84.0 | −32.4893 | 7.4358 | <0.0001 |
| <30 days | 44 (12.0) | 69.0 | −37.0555 | 4.8338 | <0.0001 |
| <1 week | 123 (33.5) | 3.0 | −21.0000 | 5.5868 | 0.0002 |
| Specialty of provider | |||||
| Primary care | 277 (75.5) | 70.0 | Referent | ||
| Non-primary care | 90 (24.5) | 14.0 | −1.0000 | 3.8892 | 0.80 |
| Non-electronic (verbal) contact | |||||
| Inpatient referrals (always require additional verbal contact) | 84 (22.9) | 2.0 | −760.000 | 17.7711 | <0.0001 |
| Outpatient verbal contact | 42 (11.4) | 20.0 | −60.0000 | 5.8490 | <0.0001 |
| No contact | 241 (65.7) | 99.0 | Referent | ||
| Patient adherent to first referral | |||||
| Yes | 313 (85.3) | 41.0 | Referent | ||
| No | 53 (14.4) | 308.0 | 231.0000 | 4.3617 | <0.0001 |