Table 3.

Parameter estimates during the 6‐min walk test (6MWT)

Group	Parameter estimates
	Parameter	Estimate	Standard error	DF	P value
PAH	PAH1	0.41	0.047	48	<0.0001
	PAH2	−0.36	0.068	48	<0.0001
	PAH3	0.14	0.001	48	<0.0001
OLD	OLD1	0.25	0.05	48	<0.0001
	OLD2	−0.26	0.07	48	0.001
	OLD3	0.11	0.002	48	<0.0001
Control	C1	0.45	0.06	48	<0.0001
	C2	−0.47	0.08	48	<0.0001
	C3	0.09	0.001	48	<0.0001
Random Effect	RE1	0.04	0.009	48	<0.0001
	RE1	−0.07	0.02	48	<0.0001
	RE2	0.19	0.04	48	<0.0001

Control, healthy controls; DF, degrees of freedom; PAH, pulmonary arterial hypertension; OLD, other lung diseases; RE, random effect.