Table 2.

Internal consistency and intrascale correlations for the TSQM at baseline and at 12 weeks

	Cronbach α	Effectiveness	Side effects	Convenience
At baseline (on iloprost)
Effectiveness	0.89	1.00
Side effects	0.93	0.21 (p = 0.10)	1.00
Convenience*	0.91	0.26 (p = 0.03)	0.13 (p = 0.29)	1.00
Global satisfaction	0.93	0.79 (p < 0.0001)	0.23 (p = 0.06)	0.42 (0.0005)
At 12 weeks (on treprostinil)
Effectiveness	0.90	1.00
Side effects	0.88	0.54 (p < 0.0001)	1.00
Convenience	0.91	0.51 (p < 0.0001)	0.44 (p = 0.0002)	1.00
Global satisfaction†	0.93	0.78 (p < 0.0001)	0.52 (p < 0.0001)	0.73 (p < 0.0001)

* 1 missing.

† 2 missing.