The effect of perceived psychological stress on the immunogenicity of the quadrivalent human papillomavirus vaccine in males
2017
ABSTRACTBackground: The human papillomavirus (HPV) vaccine is recommended for male and female recipients aged 9–26 years, and is effective in preventing HPV infection and cancer precursors. However, there is variability in immunogenicity among recipients as measured by anti-HPV geometric mean titers. In this study, we explored the effect of stress level on the immunogenicity of the HPV vaccine among college age males. Methods: 220 males aged 18–25 y were randomly assigned to 6-month (0, 2, and 6) and 12-month (0, 2, and 12) dosing schedules. Antibody titers were measured before the first dose and 2–6 weeks following the final dose. We recorded participants' age and stress level, based on a 4-item Perceived Stress Scale (PSS-4) questionnaire. Results: The average age of participants was 21.3 y old. Inspection of titers by quartile on the stress scale generally showed highest titers with highest stress. Spearman correlation coefficients revealed significant correlation between stress and titers for HPV-6, 1...
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