Table 2.

Medicare beneficiary panel characteristics associated with being a rheumatologist whose bDMARDs prescription constitute ≥20% DMARD claims for adults ≥65 years of age.

	OR (95% CI)
Variables	Unadjusted	Adjusted
Beneficiary panel size
<300 Beneficiaries	Reference	Reference
300–600 Beneficiaries	0.75 (0.59–0.95)	0.74 (0.57–0.96)∗
>600 Beneficiaries	0.60 (0.44–0.80)	0.87 (0.41–0.79)∗
≥80% Female	0.83 (0.63–1.11)	0.87 (0.65–1.16)
≥15% Black	0.91 (0.71–1.17)	0.74 (0.56–0.97)∗
≥50% 75 y of age or older	1.49 (1.14–1.94)	1.50 1.14–1.99)∗
<25% Dual eligible	0.70 (0.56–0.88)	0.70 (0.54–0.00∗
Comorbid conditions
≥20% Cancer	1.29 (0.96–1.73)	0.94 (0.67–1.31)
≥20% Congestive heart failure	1.51 (1.22–1.87)	1.48 (1.15–1.91)∗
≥20% Chronic kidney disease	1.00 (0.81–1.24)	0.74 (0.57–0.95)∗