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. 2022 Jul 15;9(5):3380–3392. doi: 10.1002/ehf2.14061

Table 3.

Internal consistency reliability of the PROMIS+HF‐27 and PROMIS+HF‐10 profiles in 600‐participant cross‐sectional sample

PROMIS+HF‐27 profile
Summary score	No. of items	Alpha	Inter‐item correlation			Item‐total correlation
Summary score	No. of items	Alpha	Average	Min	Max	Min	Max
Physical health	14	0.90	0.37	0.10	0.60	0.42	0.73
Mental health	9	0.90	0.49	0.27	0.76	0.62	0.79
Social health	4	0.82	0.50	0.43	0.55	0.75	0.83
Overall health	27	0.94	0.37	0.10	0.75	0.33	0.74

PROMIS+HF‐10 profile
Summary score	No. of items	Alpha	Inter‐item correlation			Item‐total correlation
Summary score	No. of items	Alpha	Average	Min	Max	Min	Max
Physical health	6	0.76	0.34	0.14	0.50	0.47	0.71
Mental health	2	0.60 ^a	0.43	NA	NA	0.84	0.84
Social health	2	0.64 ^a	0.44	NA	NA	0.81	0.86
Overall health	10	0.85	0.35	0.14	0.50	0.41	0.73

Alpha, Cronbach's alpha.

^{^a}

Spearman–Brown coefficient due to two‐item summary score.