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Revista Española de Salud Pública

versão On-line ISSN 2173-9110versão impressa ISSN 1135-5727


LEON-LARIOS, Fátima  e  GOMEZ-BAYA, Diego. Design and validation of a brief questionnaire to assess young's sexual knowledge. Rev. Esp. Salud Publica [online]. 2018, vol.92, e20180628.  Epub 01-Jun-2018. ISSN 2173-9110.


Only very few instruments have been developed to assess sexual knowledge and practices. Most of the research to date has been carried out with adolescent samples, but not with university students, who are also at a particularly risky stage. The aim of this study was to design and validate a brief questionnaire to assess young´s sexual knowledge, practices and behaviors to design health education programs in the university context.


We created a specific questionnaire about sexual pattern in university adolescents and a brief questionnaire consisted of 9 items (true/false) about contraception, sexuality and sexual transmission diseases. We carried out a pilot study, reliability (KR-20) and validity analyses using factorial analysis and examining the association with other variables.


566 students from University of Seville participated during 2015/16. One item was eliminated because of comprehension (only 13.9% of correct answers) and weak or non significant associations (p > 0.05). Finally, the scale was formed by 8 items and had good internal consistency reliability (KR-20 = 0.57), and both factorial and external validity reliability. A three-factor model showed good data fit, χ2 (14, N=566)=17.48, p= 0.232, Comparative Fit Index CFI = 0.97, root mean squared error of prediction RMSEA = 0.02. Participants with less knowledge about sexuality were whose did not receive any information (M=6.82, SD=1.41), without partner (M=6.87, SD=1.35), had an abortion (M=6.43, SD=1.95) and did not use any contraceptive method (M=6.66, SD=0.58) or coitus interruptus (M=6.55, SD=1.39), and had less sexual relationships, e.g., once or twice a year (M=6.49, SD=1.70).


This questionnaire is a short instrument to assess students´ practices and knowledge about sexuality and contraception. The analyses of reliability and validity have shown the good psychometric properties of this instrument.

Palavras-chave : Questionnaire; Responsible sexuality; Young; Contraceptives; Sexual behavior.

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