TABLE 7. Inter-Factor Covariances, Standard Error Estimates, Critical Ratios, and Correlations 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
Factor covariances	COV	SE	CRb	r	COV	SE	CRb	r	COV	SE	CRc	r
EFFORT ↔ SMOTHERING	6.56	1.44	4.56	0.91	10.86	1.11	9.76	0.99	5.13	1.26	4.07	0.71
EFFORT↔TIGHTNESS	5.49	1.08	5.09	0.85	7.75	1.22	6.35	0.78	4.28	0.97	4.42	0.69
SMOTHERING ↔ TIGHTNESS	4.99	1.20	4.15	0.84	10.29	1.30	7.90	0.82	4.57	1.16	3.92	0.63

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); COV, unstandardized covariance estimate between factors; SE, standard error, CR, critical ratio (COV/SE, t-statistic); P, P value for t-statistic with df, n-1; r, interfactor correlation (standardized covariance estimate).

^aData from ref 23.

^bP< .0001 for all estimates.

^cP < .0002 for all estimates.