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A randomised controlled trial of a safer sex intervention delivered through mobile phone messaging

Safetxt: A randomised controlled trial of an intervention delivered by mobile phone messaging to reduce sexually transmitted infections (STI) by increasing sexual health precaution behaviours in young people

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN64390461
Enrollment
6250
Registered
2016-03-17
Start date
2016-04-01
Completion date
Unknown
Last updated
2026-05-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Topic: Infectious Diseases

Interventions

Participants will be randomly allocated, using a remote computer based randomised system, to a safer sex intervention delivered by text messaging or to a control group. The allocation will be by simpl

Sponsors

London School of Hygiene and Tropical Medicine
Lead Sponsor

Eligibility

Sex/Gender
All
Age
16 Years to 24 Years

Inclusion criteria

Inclusion criteria: 1. Aged 16 to 24 inclusive 2. Received a positive chlamydia or gonorrhoea test result or have been diagnosed with NSU in the last 2 weeks 3. Own a personal mobile phone 4. Able to provide informed consent

Exclusion criteria

Exclusion criteria: Known to be a sexual partner of someone already recruited to the trial.

Design outcomes

Primary

MeasureTime frame
Cumulative incidence of Chlamydia and gonorrhoea infection at one year assessed by NAAT (nucleic acid amplification test) tests: urine for men with pharyngeal and anal swabs for MSM (men who have sex with men) and self-taken vulvo-vaginal swab for women.

Secondary

MeasureTime frame
Current secondary outcome measures as of 30/10/2019: Measured at 4 weeks: Behaviours: 1. Whether participants took the (prescribed antibiotic) treatment and avoided sex for 7 days after treatment, self-reported on 4-week questionnaire 2. Whether they told the last person they had sex with before testing positive, that they needed to get treatment, self-reported on 4-week questionnaire 3. Clinic attendance by partner for treatment, identified from clinic records 4. Condom use at last sex, self-reported on 4-week questionnaire Process outcomes – scores of the theoretical constructs underlying the components of the intervention (behaviour change mediators): 1. Attitudes towards partner notification, self-reported on 4-week questionnaire 2. Self–efficacy in telling a partner about an infection, self-reported on 4-week questionnaire 3. Self–efficacy in negotiating condom use, self-reported on 4-week questionnaire 4. Correct condom use self-efficacy, self-reported on 4-week questionnaire 5. Knowledge related to STIs, self-reported on 4-week questionnaire Measured at 1 year: STIs: 1. Diagnosed with any STI after joining the trial according to self-report confirmed by postal test results and clinic records, self-reported on 1-year questionnaire Behaviours: 1. Condom use at last sex, self-reported on one year questionnaire 2. Number of sexual partners since joining the trial, self-reported on one year questionnaire 3. Sex with someone new since joining the trial, self-reported on one year questionnaire 4. Condom use at first sex with most recent new partner, self-reported on one year questionnaire 5. Self-reported sexually transmitted infection testing for self - prior to first sex with most recent new partner, self-reported on 1-year questionnaire 6. Sexually transmitted infection testing for self - prior to first sex with most recent new partner, confirmed according to clinic record that testing occurred 7. Participant’s report as to whether their most recent new partne

Countries

England, United Kingdom

Contacts

Public ContactCaroline Free
Caroline.Free@lshtm.ac.uk+44 (0)207958 8109

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: May 22, 2026