The study was previously approved by the Human Research Ethics Committee of the University of Granada. The target population was defined in the inclusion criteria of the study. Participants were recruited from the general Spanish population by incidental sampling to obtain a balanced proportion of men and women, and also across age groups (18–34; 35–49; 50 years old or older), between March 2018 and February 2019. The evaluation in the paper-and-pencil format (86.6% of the sample) and the online format (13.4% of the sample) was used. Both procedures showed no differences in the responses in terms of information on general behaviors (Carreno et al., 2020 (link)) or sexual behaviors (Sierra et al., 2018 (link)). The evaluation format presented low or non-existent correlations with the other analyzed variables. The participants who completed questionnaires in paper and pencil format were approached using snowball sampling techniques in educational, community, and leisure centers. Firstly, we requested the approval of the center, which was informed on the objective of the research. The questionnaires were managed by a trained evaluator, and the participants answered in small groups or individually, which were returned in sealed envelopes. The online questionnaires were created on the LimeSurvey platform. The URL to access was distributed through social networks (Facebook®, Twitter®, WhatsApp® groups, and e-mail). The IP address was controlled and automatic responses were avoided by answering a security question consisting of a random arithmetic question. The participants accepted an informed consent form which specified the overall objective of the study. Anonymity and confidentiality were guaranteed, and their participation was voluntary without compensation.
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