Effects of a Brief Web-Based "Social Norms"-Intervention on Alcohol, Tobacco and Cannabis Use Among German University Students: Results of a Cluster-Controlled Trial Conducted at Eight Universities.

Background and Aim: "Social norms" (SN)-interventions are aimed at changing existing misperceptions regarding peer substance use by providing feedback on actual norms, thereby affecting personal substance use. It is unknown whether SN-intervention effects previously demonstrated in US students can be replicated in German students. The aim of the INSIST-study was to examine the effects of a web-based SN-intervention on substance use. Design: Cluster-controlled trial. Setting: Eight Universities in Germany. Participants and Measurements: Students were recruited at four intervention vs. four delayed intervention control Universities. 4,463 students completed baseline, 1,255 students (59% female) completed both baseline and 5-months follow-up web-based surveys on personal and perceived peer substance use. Intervention participants received feedback contrasting personal and perceived peer use with previously assessed use and perceptions of same-sex, same-university peers. Intervention effects were assessed via multivariable mixed logistic regression models. Findings: Relative to controls, reception of SN-feedback was associated with higher odds for decreased alcohol use (OR: 1.91, 95% CI 1.42-2.56). This effect was most pronounced in students overestimating peer use at baseline and under or accurately estimating it at follow-up (OR: 6.28, 95% CI 2.00-19.8). The OR was 1.33 (95% CI 0.67-2.65) for decreased cannabis use in students at intervention Universities and was statistically significant at 1.70 (95% CI 1.13-2.55) when contrasting unchanged and decreased with increased use. Regarding tobacco use and episodes of drunkenness, no intervention effects were found. Conclusions: This study was the first cluster-controlled trial suggesting beneficial effects of web-based SN-intervention on alcohol and cannabis use in a large sample of German University students. Clinical Trial Registration: The trial registration number of the INSIST-study is DRKS00007635 at the "German Clinical Trials Register."

Does the use of small aids during patient handling activities lead to a decreased occurrence of musculoskeletal complaints and diseases? A systematic review.

PURPOSE: Patient handling increases the risk of musculoskeletal complaints and diseases among healthcare workers. Thus, the use of small aids for patient handling is recommended. Small aids are non-electrical and handy assistive devices that support caregivers during patient handling. To date, there is no evidence about the clinical efficacy of small aids. Hence, the objective of this systematic review was to systematically analyze whether the use of small aids during patient handling leads to a decreased occurrence of musculoskeletal disorders. METHODS: A systematic literature search was carried out. The review process was done independently by two reviewers. Methodology was assessed with the "Downs and Black checklist" and the "Risk of Bias tool." Quality of evidence was determined with the GRADE method. RESULTS: One randomized and two non-randomized trials were included. Three comparisons of intervention assessing the lumbar spine and shoulder joint were investigated. A statistically significant improvement of the 7-day prevalence of low back pain and shoulder pain was achieved within the intervention group over time of questionable clinical importance in a study with comparisons made between small aids and usual practice or mechanical aids. No comparison between the intervention group and control group at follow-up was made. Each trial showed an insufficient methodology and a high risk of bias. Quality of evidence was low for disability scores and very low for pain outcomes. CONCLUSIONS: To date, there is no convincing evidence (from low-quality studies) for the preventability of musculoskeletal complaints and diseases by the use of small aids. The literature also lacks evidence for the opposite. Generalizability of the study results is further debatable due to the different populations and settings that were investigated. Robust, high-quality intervention studies are necessary to clarify the clinical efficacy of small aids in healthcare work. PROSPERO REGISTRY NUMBER: CRD42014009767.