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The purpose of this paper is to describe the results of the construct validity by the known-groups method of a Brazilian cooking skills and healthy-eating questionnaire.

Responses obtained from university students (n=767) for Brazilian-Portuguese cooking skills and health eating questionnaire, surveyed online, were submitted to construct validity comparing two known groups. The t-test was used to compare differences between gender (male and female) and the level of cooking knowledge (high or low) in each measure of the questionnaire. Internal consistency was evaluated by obtaining the Cronbach’s coefficient.

Women showed significantly higher means than men in all scale measures, except in the self-efficacy for using basic cooking techniques (SECT), where no differences were found. Students classified as having high cooking knowledge and had higher score means in all scales compared to the students with low levels. Internal consistency was adequate for all scales (a>0.70), except for cooking attitude (CA) (a=0.33) and cooking behavior (CB) scales (a=0.59).

SECT likely depends on cooking knowledge, independent of gender, suggesting further examination. Items and structure of CA and CB constructs also need to be examined more deeply.

A validated cooking skills and health-eating questionnaire demonstrated its ability to detect differences between groups, useful to provide data for further interventions.

No available cooking skills questionnaires were found that have been validated by the known-groups method regarding differences between gender and individuals’ level of cooking knowledge, as conducted in this study.

Self-efficacy in cooking and consuming fruits and vegetables is one of the dimensions that compose cooking skills. This cross-sectional study aimed to assess the self-efficacy of Brazilian university students in cooking and consuming fruits and vegetables and examine the relationship of self-efficacy with sociodemographic and lifestyle characteristics.

Data were collected through an online questionnaire, which was culturally adapted and validated for the studied population. Questions about self-efficacy for using basic cooking techniques (SECT), self-efficacy for using fruits, vegetables, and seasonings (SEFVS) and produce consumption self-efficacy (SEPC) were rated on a five-point Likert scale. Differences in median self-efficacy score between groups were compared using the Mann–Whitney U test or the Kruskal–Wallis test followed by the Mann–Whitney U test.

766 subjects participated in the study. The mean age was 21 ± 5.6 years, most respondents were female (60%), reported to know how to cook (72%), and lived with parents and/or grandparents (45%). The median SECT and SEFVS scores were 3.55, and the median SEPC score was 3.33. Female students, individuals aged more than 25 years, and students who did not live with their parents or grandparents had higher (p < 0.005) self-efficacy scores. Low SECT, SEFVS and SEPC scores were associated with having less than one hour a day to cook (p = 0.023, 0.01, and 0.002, respectively) and not knowing how to cook (p < 0.001). There was no relationship of median self-efficacy scores with source of knowledge about cooking skills or parental education.

The results of this study can guide interventions and public policies aimed at health promotion in the university setting.