Table II.
Ordered logistic regression model predicting that the interval between first sign or symptom and diagnosis increased by quartile distribution (n = 3831)
| Odds ratio |
95% confidence interval |
|
|---|---|---|
| Male | 0.75 | 0.67–0.84 |
| Year of diagnosis | 1.03 | 1.01–1.06 |
| Age at diagnosis | 1.02 | 1.01–1.03 |
| Geographic region | ||
| Northeast | 0.92 | 0.78–1.09 |
| South | 0.98 | 0.81–1.20 |
| Midwest | 1.14 | 0.99–1.32 |
| Non-white race/ethnicity | 1.19 | 1.02–1.39 |
| No. of physician visits in past year | 1.05 | 1.05–1.06 |
| No. of inpatient stays in past year | 1.07 | 1.02–1.13 |
| Comorbidity: ≥1 present | ||
| Anemia/PRBC + back pain | 1.58 | 1.25–2.00 |
| No anemia/PRBC + back pain | 1.37 | 1.18–1.59 |
| Diagnosed during inpatient stay | 0.73 | 0.64–0.84 |
PRBC, packed red blood cell transfusion. Age at diagnosis measured for increasing year of age; Geographic regions were compared to West; non-white race/ethnicity was compared with white.