TABLE 6. Regression Weights and Standard Errors for 3-Factor / 7-Indicator Model in Patients with Heart Failure and Chronic Obstructive Pulmonary Disease.

	HF: Study Day 1 (N = 119)				HF: Study Day 0 (n = 97)				COPD (n = 100)^a
Item → FACTOR	B	SE	CR^b	β	B	SE	CR^b	β	B	SE	CR^b	β
work → EFFORT	^c	^d	^d	0.89	^c	^d	^d	0.91	^c	^d	^d	0.89
effort → EFFORT	1.03	0.06	18.14	0.89	0.94	0.09	10.67	0.87	0.90	0.09	10.26	0.87
tight → TIGHTNESS	^c	^d	^d	0.85	^c	^d	^d	0.88	^c	^d	^d	0.69
constrict → TIGHTNESS	1.16	0.14	8.03	0.93	1.10	0.09	12.40	0.96	1.31	0.20	6.58	0.86
smother → SMOTHER	^c	^d	^d	0.89	^c	^d	^d	0.93	^c	^d	^d	0.87
suffocate → SMOTHER	0.92	0.07	12.61	0.86	0.90	0.07	12.92	0.79	1.15	0.10	11.69	0.87
hunger → SMOTHER	0.97	0.10	9.56	0.80	0.84	0.07	12.90	0.81	0.90	0.10	9.26	0.78

HF, heart failure; COPD, chronic obstructive pulmonary disease; Study Day 1, day enrolled in study (today rating); Study Day 0, day of admission (recall rating, obtained immediately after Study Day 1 rating); B, unstandardized regression weights; SE, standard error; CR, critical ratio (B/SE); β, standardized regression (beta-) weights.

Data from ref 23.

P < 0.0001 for all estimates.

Scaling constant (one constant required per factor; value set to 1.0).

Not estimated.