Table 3.

Logistic regression model variables showing significant predictive likelihood for correct inhaler technique maintenance

Predictor	Coding	B	SE	Deviance	df	p value	Odds ratio	95% CI for odds ratio
								Lower	Upper
Inhaler technique at VISIT 1	0 = Correct technique (n = 56)	1.965	.455	17.431	1	.000	7.131	3.104	18.922
	1 = Incorrect technique (n = 182)
Regimen Score	Score range 1–7	.275	.127	4.498	1	.031	1.317	1.027	1.701
Device type	0 = DPI (n = 167)	.791	.355	5.344	1	.026	2.205	1.116	4.554
	1 = pMDI (n = 71)a

Outcome variable coding for inhaler technique maintenance: 0 = maintained correct inhaler technique, 1 = did not maintain correct inhaler technique.

^a MDI and MDI with a spacer groups were combined under pMDI to achieve sufficient group size for logistic regression analysis