For population-based research using the Swedish hospital discharge register, only a primary diagnosis of HF should be considered a definite case unless individually validated.
The HF diagnosis in the Swedish hospital discharge register appears slightly less precise than for acute myocardial infarction and stroke. For population-based research, only those with a primary diagnosis of HF in the hospital discharge register should be regarded as definite HF cases, or alternatively the cases should be validated individually.
Ingelsson et al. (Wed,) studied this question.
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