Table 2.

Results of logistic and linear regression analyses of participant characteristics with initial use, prolonged use, sustained use, and satisfaction as dependent variables. VIF^a≤1.32.

	Initial use (N=657)		Prolonged use (N=657)			Sustained use (N=657)			Satisfactionb (N=237)
	ORc (95% CId)	P value		OR (95% CI)	P value	OR (95% CI)	P value	Regression coefficiente (95% CI)		P value
Gender (female vs male)	0.98 (0.83-1.15)	.89		1.19 (0.84-1.68)	.32	1.12 (0.90-1.41)	.61	–0.21 (–0.69 to 0.28)		.40
Age	1.01 (0.99-1.03)	.35		1.02 (0.99-1.04)	.18	1.04 (1.02-1.05)	.02	–0.02 (–0.05 to 0.02)		.38
COPDf status (COPD vs at risk for COPD)	1.39 (0.96-2.02)	.10		1.38 (0.93-2.05)	.11	1.83 (1.15-2.91)	.01	–0.16 (–0.69 to 0.36)		.55
Education level (low vs high)	0.96 (0.64-1.42)	.82		0.71 (0.47-1.09)	.12	0.82 (0.47-1.44)	.48	0.56 (–0.07 to 1.18)		.08
Education level (medium vs high)	1.45 (0.982.1-4)	.06		1.29 (0.87-1.90)	.20	1.36 (0.83-2.22)	.23	0.40 (–0.15 to 0.96)		.16
Smoking status (smoking vs not smoking)	0.77 (0.56-1.06)	.13		0.76 (0.54-1.08)	.14	0.72 (0.57-0.92)	.18	–0.17 (–0.72 to 0.39)		.56
Level of physical activity (METg per week)	1.00 (1.00-1.00)	.69		1.00 (1.00-1.00)	.57	1.00 (1.00-1.00)	.88	0.00 (0.00-0.00)		.93
Intention change behavior (1=highest intention, 7=lowest intention)	0.93 (0.85-1.03)	.15		0.93 (0.84-1.03)	.14	0.89 (0.78-1.02)	.08	–0.18 (–0.32 to –0.03)		.02
Dyspnea status (no breathlessness vs breathlessness)	1.01 (0.70-1.45)	.97		0.71 (0.48-1.04)	.08	0.55 (0.31-0.96)	.04	–0.43 (–1.01 to 0.15)		.15

^aVIF: variance inflation factor.

^bOnly participants who completed at least one intervention component were included in this analysis.

^cOR: odds ratio.

^dCI: confidence interval.

^eLinear regression coefficient indicates the effect of this variable on satisfaction after correction for the other variables in the model.

^fCOPD: chronic obstructive pulmonary disease.

^gMET: metabolic equivalent task.