Table 4.

Sensitivity Analyses on Initiation and Continuation Models

	Use Biologic Conditional on Not Having Used It Before				Use Biologic Conditional on Initiation
	Newly Diagnosed with Other Family IV Probit Estimation				Newly Diagnosed with Other Family IV Probit Estimation
	Original Specification in Table 3				Original Specification in Table 3
	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
Measures of plan biologic generosity
Average plan biologic OOP costs under medical benefits (in U.S.$100)	0.001			0.0016	−2.5e-04			−3.02e-04
	(0.001)			(0.0013)	(0.002)			(0.002)
Average plan biologic OOP costs under pharmacy benefits (in U.S.$100)	−0.011**			−0.01**	−0.02***			−0.019***
	(0.005)			(0.005)	(0.006)			(0.006)
Average plan biologic OOP costs in top quartile under medical benefits (1/0)		0.05				−0.02
		(0.05)				(0.08)
Average plan biologic OOP costs in top quartile under pharmacy benefits (1/0)		−0.24***				−0.18**
		(0.07)				(0.09)
Average plan biologic OOP costs in top quartile under medical and pharmacy benefits (1/0)			−0.29***				−0.20**
			(0.08)				(0.10)
Measures of family OOP burden
Other family OOP in top quartile within the plan	−0.494***	−0.50***	−0.52***		0.045	0.04	0.04
	(0.178)	(0.18)	(0.17)		(0.299)	(0.30)	(0.30)
Other family OOP per capita in top quartile within the plan				−0.65***				0.06
				(0.23)				(0.39)
All control variables listed in Table 3	Included	Included	Included	Included	Included	Included	Included	Included
Observations	12,183	12,183	12,183	12,183	3,207	3,207	3,207	3,207

Notes. Standard errors (clustered at the individual level) in parentheses.

^*Significant at 10%;

^**Significant at 5%;

^***Significant at 1%.

IV, instrumental variables; OOP, out of pocket.