Introduction: Evidence-based nursing and self-efficacy are significant factors behind quality care delivery in critical care units. Aim: This study aimed to assess the effects of an evidence-based nursing training workshop on critical care nurses’ self-efficacy. Methods: This two-group pretest-posttest quasi-experimental study was undertaken in 2016 in two large-scale hospitals in Tehran, Iran. The participating nurses from one hospital were purposefully allocated to the intervention group and the other hospital’s participants comprised the control group. A convenience sample of 45 nurses was selected from each hospital. For nurses in the intervention group, an evidence-based nursing training workshop was held in four two-hour sessions on two successive days, while the nurses in the control group received no specific evidence-based nursing training. Findings: After the intervention, these values increased to 51.1±2.49 and 61.6±2.05, respectively. The increase in the intervention group was statistically significant (P = 0.001), while the increase in the control group was insignificant (P = 0.06). Thus, the posttest mean score of self-efficacy in the intervention group was significantly greater than the control group. Conclusion: Evidence-based nursing training significantly improves the nurses’ self-efficacy. Therefore, healthcare policy-makers and authorities are recommended to provide nurses with in-service and evidence-based nursing training programs.

Aims and Objectives: Osteoporosis is one of the most important metabolic bone disease and health problems worldwide. The study's objective is to investigate the effect of health belief model based education on the prevention of osteoporosis in female administrative staffs in Iran. Methods: In this quasi-experimental study, 110 female administrative staffs in medical, dentistry, pharmacy, health, nursing and midwifery faculties of Guilan University of Medical Sciences in Rasht, Iran, were selected in 2016-2017. The data collection was carried out using: 1-Demographic information 2- Osteoporosis knowledge questionnaire, 3- Osteoporosis health beliefs questionnaire. Both experimental and control groups were evaluated in three stages. Results: The results of the present study showed that the majority of the studied subjects were married (84.5%), aged 35-40 (44.5%), had undergraduate degrees (62.7%), and their field of study was humanities (80.9%). Independent t-test showed that the pre-intervention mean score of all dimensions of Perceived Knowledge, Perceived Susceptibility, Perceived Seriousness, Perceived Benefits, Calcium’s Perceived Benefits, Osteoporosis prevention Perceived Barriers, Physical Perceived Barriers was not statistically significant in both groups (p>0.05), but such score was statistically significant in both experimental and control groups one day and one month after (P<0.0001). Conclusions: Findings of the research indicate that the health belief model can help to raise knowledge, perceived susceptibility, and perceived severity of the consequences and risks of a disease with an unhealthy behavior, as well as achieve an understanding of the benefits and barriers to a healthy behavior.