Table 3.

Construct Validity Among Health Status Measures

Measure	Correlation, ra (95% Confidence Interval)
	Baseline	Follow-up	Change
PROMIS Physical Function CAT
KCCQ Physical Limitation	0.79 (0.70, 0.85)	0.77 (0.61, 0.88)	0.68 (0.48, 0.82)
6-minute walk distance	0.67 (0.46, 0.80)	0.55 (0.15, 0.80)	0.47 (0.19, 0.66)
PROMIS Physical Function Short Form-10a
KCCQ Physical Limitation	0.85 (0.75, 0.90)	0.75 (0.59, 0.88)	0.74 (0.55, 0.87)
PROMIS Fatigue CAT
KCCQ Fatigue 05	0.74 (0.53, 0.84)	0.59 (0.33, 0.73)	0.70 (0.48, 0.81)
KCCQ Fatigue 06	0.83 (0.57, 0.90)	0.59 (0.38, 0.75)	0.69 (0.49, 0.81)
SF-36 Vitality	0.74 (0.53, 0.87)	0.78 (0.62, 0.87)	0.77 (0.61, 0.86)
6-minute walk distance	0.59 (0.29, 0.78)	0.22 (0.14, 0.61)	0.45 (0.14, 0.68)
PROMIS Fatigue Short Form-7a
KCCQ Fatigue 05	0.83 (0.69, 0.90)	0.55 (0.29, 0.72)	0.72 (0.52, 0.82)
KCCQ Fatigue 06	0.84 (0.70, 0.91)	0.55 (0.30, 0.70)	0.63 (0.43, 0.76)
SF-36 Vitality	0.77 (0.62, 0.87)	0.76 (0.61, 0.86)	0.76 (0.61, 0.85)
PROMIS Depression CAT
PHQ-2 Depression	0.71 (0.50, 0.84)	0.21 (0.10, 0.56)	0.53 (0.24, 0.77)
PROMIS Depression Short Form-8a	0.63 (0.43, 0.75)	0.44 (0.16, 0.66)	0.53 (0.31, 0.71)
PHQ-2 Depression	0.65 (0.45, 0.76)	0.42 (0.13, 0.64)	0.57 (0.34, 0.74)
PROMIS DSA CAT
KCCQ Social Limitation	0.70 (0.51, 0.82)	0.69 (0.48, 0.82)	0.61 (0.44, 0.75)
PROMIS DSA Short Form-7a
KCCQ Social Limitation	0.74 (0.61, 0.83)	0.63 (0.40, 0.78)	0.60 (0.43, 0.72)

Abbreviations: CAT, computerized adaptive test; DSA, Satisfaction With Discretionary Social Activities; KCCQ, Kansas City Cardiomyopathy Questionnaire; PHQ, Patient Health Questionnaire; Medical Outcomes Study Short Form-36.

^aFrom Pearson product moment correlation.