Development, psychometric evaluation, and initial feasibility assessment of a symptom tracker for use by patients with heart failure (HFaST)

Journal of Patient-Reported Outcomes

Table 2 Inter-item Correlations on Study Day 4 (n = 92 to 97)

HFaST Item	1	2	3	4	5	6	7	8	9	10
HFaST 1 Fatigue or low energy level when performing everyday activities	1
HFaST 2 Fatigue or low energy level even while sitting or lying down	0.82	1
HFaST 3 Shortness of breath when performing everyday activities	0.62	0.67	1
HFaST 4 Shortness of breath at rest	0.53	0.68	0.75	1
HFaST 5 Shortness of breath while lying down or reclining (for example, needing to add pillows or move to a recliner to sleep)	0.56	0.68	0.74	0.91	1
HFaST 6 Sudden attacks of shortness of breath that wake you from sleeping	0.45	0.49	0.52	0.74	0.81	1
HFaST 7 Cough	0.46	0.33	0.56	0.58	0.57	0.44	1
HFaST 8 Swelling of feet, ankles, legs, or abdomen; shoes or waistband feeling tight	0.62	0.48	0.53	0.60	0.60	0.56	0.51	1
HFaST 9 Heart palpitations—rapid, fluttering, or pounding heartbeat	0.54	0.69	0.64	0.67	0.69	0.53	0.53	0.45	1
HFaST 10 Have you gained more than 2 pounds during the past 24 h or more than 5 pounds during the past 72 h?	−0.05	− 0.05	−0.27	− 0.12	−0.13	− 0.15	−0.21	− 0.20	−0.15	1

HFaST Heart Failure Symptom Tracker
Note: HFaST values are as follows: 0 = Did not experience in the past 24 h, 1 = Much better than usual, 2 = Somewhat better than usual, 3 = Slightly better than usual, 4 = About the same as usual, 5 = Slightly worse than usual, 6 = Somewhat worse than usual, 7 = Much worse than usual. HFaST Item 10 values: 1 = yes, 2 = no