Objective:

To build and validate an instrument to measure the behavioral intention to reduce the consumption of dietary salt in people with heart failure.

Materials and methods:

Methodological study based on the theory of planned behavior and developed in three stages: construction of the instrument, content validation with expert judges, and semantic validation with 30 people from the target population, from March to September 2018, in the municipality of João Pessoa, Brazil.

Results:

Six expert judges participated in content validation. The instrument has 30 items distributed in the constructs attitude, subjective norm, and perceived behavioral control. The content validity index was satisfactory (> 80 %), and the semantic validation of the instrument was considered clear and understandable.

Conclusions:

As a product, the instrument proved to be valid in terms of content and understanding. This tool can be applied in a pilot study to assess its psychometric quality for measuring the behavior of interest in the context of heart failure.

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