Introduction:

92.5% of influenza deaths in children were associated with the absence of vaccination. Many parents have expressed some concern, which has led them to postpone some vaccinations or even to suspend them completely.

Objective:

to validate an instrument to identify the risk of non-vaccination against influenza in rightful claimants under five years of age.

Methods:

descriptive, cross-sectional study. With a universe of 3,292 parents of children under five years of age, with a probabilistic sample of 345 parents assigned to the Family Medical Unit No. 1 between November 2021 and February 2022. An instrument was designed to determine measures of central tendency and dispersion. Cronbach's Alpha was calculated for internal congruence and validation of the instrument.

Results:

127 children (36.8%) had incomplete vaccination schedules and 114 children (33%) had incomplete influenza vaccination schedules. There was a relationship between maternal schooling and lack of influenza vaccination. According to the risk of non-vaccination in future vaccine applications, only 15 children (4.3%) presented a high risk. Specifically for the influenza vaccine, the internal congruence test with Cronbach's Alpha was applied to each item and a high reliability was obtained.

Conclusions:

the instrument “Risk scale for non-vaccination in children under five years of age” showed high reliability with a Cronbach's Alpha greater than 0.9. Misinformation was the main risk factor for non-vaccination.

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