Table 3.
Multivariate logistic regression model for use of bone conservation agents or DXA in patients enrolled in Medicare Part D
| Independent variables § | OR (95% CI) | P value | |
|---|---|---|---|
| Age, years (66 – 74) | ≥75 | 1.4 (0.91-2.0) | 0.13 |
| Ethnicity (Non-Hispanic white) | Hispanic | 0.96 (0.53-1.7) | >0.20 |
| African-American | 1.0 (0.52-2.0) | >0.20 | |
| Other | 0.73 (0.16-3.3) | >0.20 | |
| Stage (Localized) | Regional | 1.5 (0.65-3.6) | >0.20 |
| Distant | 7.6 (4.1-14.0) | <.0001* | |
| Unknown | 1.4 (0.82-2.4) | >0.20 | |
| Type of ADT (Parenteral ADT) | Orchiectomy | 0.12 (0.02-1.00) | 0.05* |
| Area of residence (Big metropolitan) | Metropolitan | 1.3 (0.81-2.2) | >0.20 |
| Urban | 0.92 (0.41-2.1) | >0.20 | |
| Small urban | 1.1 (0.56-2.2) | >0.20 | |
| Rural | 4.6 (1.6-13.6) | 0.01* | |
| Enrolled in state buy-in (No) | Yes | 0.98 (0.58-1.6) | >0.20 |
| % with high school † (Q1: 3.87%-19.75%) | Q2: 19.76% - 26.88% | 1.3 (0.75-2.2) | >0.20 |
| Q3: 26.89% - 32.89% | 0.41 (0.21-0.81) | 0.01* | |
| Q4: ≥32.90% | 0.73 (0.38-1.44) | >0.20 | |
| Median annual income† (Q1: $8,063 - $27,937) | Q2: $27,938 - $35,426 | 1.5 (0.84-2.7) | 0.16 |
| Q3: $35,427 - $49,512 | 1.5 (0.80-2.8) | >0.20 | |
| Q4: ≥$49,513 | 1.3 (0.65-2.6) | >0.20 | |
1059 patients included in analysis, with 134 having a claim for bone conservation agents or for a DXA exam
§
Reference category in brackets
†
Categories represent quartiles, data missing for one patient
*
statistically significant
DXA: Dual energy x-ray absorptiometry; ADT: Androgen deprivation therapy; Q: Quartile