A Mobile Intervention to link Female Entertainment Workers in Cambodia to Health and Gender-based Violence Services: Randomized Controlled Trial (Preprint)

BACKGROUND Female entertainment workers (FEWs) in Cambodia experience a greater prevalence of human immunodeficiency virus (HIV), other sexually transmitted infections (STIs), psychological distress, substance use, and gender-based violence (GBV) than the general population. Reaching FEWs with health education and linking them to services has been difficult because of their hidden and stigmatized status. OBJECTIVE This study evaluates the Mobile Link intervention, aiming to improve FEWs’ health by connecting them to health services using automated twice-weekly short message services and voice messages with health information and direct links to outreach workers. METHODS The randomized controlled trial was conducted between March 2018 and June 2019. We employed a stratified random sampling method to select participants from five study sites. Initially, we randomly selected 600 participants from a list of 4000 FEWs by age group and study site using a random number generator and enrolled them in person. The primary outcome measures included self-reported HIV and STI testing, condom use, and contraceptive use, which we assessed through face-to-face structured interviews. We also measured secondary outcomes, including contact with outreach workers, escorted referral services use, forced drinking, and GBV experiences. Intervention effects were modeled using repeated measures, multilevel mixed-effects logistic regression. RESULTS We included 218 FEWs in intervention and 170 FEWs in control arms in the per-protocol analyses after 212 removing dropouts. Evidence of positive intervention effects was detected for the following secondary outcomes: contacting an outreach worker (group by time 2 AOR 3.29, 95% CI 1.28–8.47), receiving an escorted referral (group by time 2 AOR 2.86, 95% CI 1.09–7.52; group by time 3 AOR 8.15, 95% CI 1.65–40.25), and never being forced to drink at work (group by time 3 AOR 3.95, 95% CI 1.62–9.60). No significant differences between intervention and control groups over time were observed for any primary outcomes in the fully adjusted models. CONCLUSIONS The Mobile Link intervention did not show an effect on the primary outcomes but effectively connected FEWs with outreach workers and escorted referrals. Reductions in forced drinking at work were also significantly more extensive in the intervention group than the control group. Longer-term messaging may increase access to services and impact FEWs’ health outcomes in the future. CLINICALTRIAL Clinical trials.gov, NCT03117842 . Registered 31 March 2017, https://clinicaltrials.gov/ct2/show/NCT03117842?term=NCT03117842&rank=1 INTERNATIONAL REGISTERED REPORT RR2-10.1186/s13063-018-2614-7

Improving Access to Health and Gender-based Violence Services for Female Entertainment Workers in Cambodia: Findings From the Mobile Link Randomized Controlled Trial

Background: Female entertainment workers (FEWs) in Cambodia experience a greater prevalence of human immunodeficiency virus (HIV), other sexually transmitted infections (STIs), psychological distress, substance use, and gender-based violence (GBV) than the general population. Reaching FEWs with health education and linking them to services has been difficult because of their hidden and stigmatized status. This study evaluates the Mobile Link intervention, aiming to improve FEWs’ health by connecting them to existing HIV, sexual and reproductive health, and GBV services using short message services and voice messages.Methods: This randomized controlled trial was conducted between March 2018 and June 2019. We employed a stratified random sampling method to select participants from five study sites. Initially, we randomly selected 600 participants from a list of 4000 FEWs by age group and study site and randomized them to intervention or standard care control arms. The primary outcome measures included self-reported HIV and STI testing, condom use, and contraceptive use. We also measured secondary outcomes, including contact with outreach workers, escorted referral services use, forced drinking, and GBV experiences. Intervention effects were modeled using repeated measures, multilevel mixed-effects logistic regression.Results: We included 218 FEWs in intervention and 170 FEWs in control arms in the per-protocol analyses after removing dropouts. Evidence of positive intervention effects was detected for the following secondary outcomes: contacting an outreach worker (group by time 2 AOR 3.29, 95% CI 1.28–8.47), receiving an escorted referral (group by time 2 AOR 2.86, 95% CI 1.09–7.52; group by time 3 AOR 8.15, 95% CI 1.65–40.25), and never being forced to drink at work (group by time 3 AOR 3.95, 95% CI 1.62–9.60). No significant differences between intervention and control groups over time were observed for any primary outcomes in the fully adjusted models.Conclusions: The Mobile Link intervention effectively connected FEWs with outreach workers and escorted referrals. Reductions in forced drinking at work were also significantly more extensive in the intervention group than the control group. Longer-term messaging may increase access to services and impact FEWs’ health outcomes in the future.Trial registration: Clinical trials.gov, NCT03117842 . Registered 31 March 2017, https://clinicaltrials.gov/ct2/show/NCT03117842?term=NCT03117842&rank=1

Improving the operation of the linear electromagnetic step device.

The improved operation of the linear electromagnetic device (LED) is proposed, without the use of additional sensors for control motion of mobile link LED and automation of technological process. Research focused on determination of the relationship of changes in active inductive parameters of the LED with its design parameters when moving the mobile link of LED and construction an improving the operation, that controls these changes for the increasing the efficiency of their functioning. For this research a theories of electrical circuits and electronic circuits were implemented, which takes into account the change in electrical parameters when moving the mobile link of the linear electromagnetic device. It is proved the dependence of the magnetic resistance in certain sections of the magnetic circuit from the position the mobile link and the design parameters of the LED, the intervals of the magnetic resistance change when the mobile link is moved by the size of the step. The accordance is found between the change in active - inductive parameters when the position of the moving link

Correction to: Mobile Link – a theory-based messaging intervention for improving sexual and reproductive health of female entertainment workers in Cambodia: study protocol of a randomized controlled trial

After publication of our article [1] we became aware that several sections of text in our Methods section were copied from a previously published article [2]. We would like to formally apologize and give credit to the authors of that article [2]: Chris Smith, Uk Vannak, Ly Sokhey, Thoai D Ngo, Judy Gold, Khemrin Khut, Phil Edwards, Tung Rathavy and Caroline Free.

ЕНЕРГОЕФЕКТИВНЕ КЕРУВАННЯ ЛІНІЙНИМ КРОКОВИМ ПРИСТРОЕМ

Analysis of known approaches and determination of the characteristics of changes in electrical characteristics during the movement of the mobile link of a linear stepper device and the construction of energy-efficient control that control these changes in order to increase the efficiency of their functioning.