. 2020 Jan 21;180(4):487–493. doi: 10.1001/jamainternmed.2019.6544

Table 2. Regression Results: Dispense Quantities.

Variable	Coefficient (95% CI)	P Value
Bivariate model
Default quantity	0.19 (0.15 to 0.22)	<.001
Multivariable model variable^a
Default quantity	0.08 (0.04 to 0.12)	.001
Age	0.01 (0.00 to 0.03)	.03
Female	−0.93 (−1.34 to −0.53)	<.001
Site 2	−2.76 (−4.96 to −0.57)	.02

^{^a}

Fixed effects calculated from 64 health care professionals who wrote 20 or more prescriptions; 40 health care professionals who wrote 19 or fewer prescriptions were grouped together, yielding 65 separate prescriber random effects. The results presented are from linear regression models.