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Cross-sectional surveys were conducted annually from 2006 to 2011 at a music festival. Eight thousand one hundred sixty-five young people completed surveys. STI testing rates increased over time, but there was an increase in the prevalence of some sexual risk behaviors and little improvement in STI knowledge between 2006 and 2011.

Background: Diaries are used in sexual behaviour research to reduce recall bias. Diary collection via mobile phone text messaging (SMS) has not been trialled previously in sexual behaviour research. This randomised controlled trial compared SMS, paper and online diaries on response rate, timeliness, completeness of data and acceptability. The correlation between behaviour reported in all three types of diaries and data collected in a retrospective questionnaire was also determined., Methods: Participants were recruited by telephone and randomised into one of three groups. They completed weekly sexual behaviour diaries for 3 months by SMS, online or paper (by post). An online survey was conducted at the end of 3 months to compare retrospective reports to the diaries and assess opinions on the diary collection method., Results: 72 participants were enrolled in the study, 24 in each group. Online diaries were more likely to be submitted late than SMS diaries (p<0.001). 3.9% of SMS diaries, 3.1% of paper diaries and 0.5% of online diaries were incomplete (p=0.001). Online data collection was the preferred mode for 51%. 65 participants completed the end point retrospective questionnaire. The correlation between the diary and questionnaire on sexual risk classification was substantial (kappa=0.74) regardless of diary mode., Conclusions: SMS is a convenient and timely method of collecting brief behavioural data, but online data collection was preferable to most participants and more likely to be complete. Data collected in retrospective sexual behaviour questionnaires were found to agree substantially with data collected through weekly self-reported diaries.

Objective: To explain rising rates of sexually transmitted infections it is necessary to monitor trends among high risk groups, such as youth. Surveillance of risk behaviours and testing among a variety of populations in different settings is required. We monitored self-reported sexual behaviour among music festival attendees., Methods: Cross-sectional studies of young people's behaviour were conducted annually at a music festival between 2005 and 2008 using self-administered questionnaires. Logistic regression, adjusted for age and gender, determined trends in risk behaviours., Results: More than 5,000 questionnaires were completed. The proportion reporting multiple sexual partners in the past year remained stable from 2005 to 2008 and condom use with these partners increased. Reporting a new sexual partner in the past three months decreased, while condom use with new partners increased. Reporting a casual sexual partner increased and condom use with casual partners remained stable. Reporting a recent STI test increased from 23% in 2006 to 32% in 2008., Conclusions and Implications: Despite increases in STI notifications, most risk behaviours are decreasing in this group, possibly as a function of increased STI testing. Music festivals are a useful setting for monitoring behaviour trends within a sub-population of young people at relatively high risk of STIs.

Young people's sexual behaviour is influenced by their perceptions of peer norms. In this survey of 445 people aged 16 to 29 years, 69% of participants believed they had fewer lifetime sexual partners than average. The mean number of actual lifetime partners reported was 5.5 and the mean perceived 'average' partners for peers was 6.6 (P < 0.01). When broken down by age and sex, the discrepancy was only significant for females aged 16 to 19. Comparison to a national survey also showed that peers' average sexual experience was overestimated. Adolescents are highly susceptible to the influence of peer norms, hence it is concerning that their perceptions of these norms are so distorted.

Background: Prevalences of sexually transmissible infections (STI), unsafe sex and abortions are increasing in Australia and people aged 16 to 29 are particularly at risk. We conducted a survey of behaviour, knowledge and perceptions of STI risk among young people attending a longstanding annual music festival called the Big Day Out., Methods: A structured questionnaire was administered to a cross-sectional sample of people aged 16 to 29 years attending a music festival (Big Day Out)., Results: Completed questionnaires were collected from 939 participants (507 females, 432 males) whose median age was 20 years. Of the participants, 751 (80%) had ever had vaginal or anal sex. In the previous year, 48% had multiple partners and in the past 3 months 66% had a new partner. Of these, 224 (39%; 30% of those who had ever had sex) did not use condoms all or most of the time and were classified as being at risk of STI; however, only 24% of those so classified perceived that they were at risk of an STI. In total, 43% of all sexually experienced participants had not used a condom because they reported being drunk or high at the time. STI knowledge was poor overall and male participants, those living in non-metropolitan regions, those under the age of 20 and those with less schooling scored relatively poorly., Conclusions: Our data suggest that young men and women who attend the Big Day Out are sexually active young adults with limited knowledge of STI and blood-borne viruses who regularly engage in behaviours that put them at risk of infection.