• Stefania Curti, Riitta Sauni, Dick Spreeuwers, Antoon De Schryver, Madeleine Valenty, Stéphanie Rivière, and Stefano Mattioli.
• Department of Medical and Surgical Sciences, University of Bologna, UO Medicina del Lavoro - Policlinico Sant'Orsola-Malpighi, Via Palagi 9, Bologna, Italy, 40138.
• Cochrane Db Syst Rev. 2015 Mar 25; 2015 (3): CD010305CD010305.

BackgroundUnder-reporting of occupational diseases is an important issue worldwide. The collection of reliable data is essential for public health officials to plan intervention programmes to prevent occupational diseases. Little is known about the effects of interventions for increasing the reporting of occupational diseases.ObjectivesTo evaluate the effects of interventions aimed at increasing the reporting of occupational diseases by physicians.Search MethodsWe searched the Cochrane Occupational Safety and Health Group Specialised Register, the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE (PubMed), EMBASE, OSH UPDATE, Database of Abstracts of Reviews of Effects (DARE), OpenSIGLE, and Health Evidence until January 2015.We also checked reference lists of relevant articles and contacted study authors to identify additional published, unpublished, and ongoing studies.Selection CriteriaWe included randomised controlled trials (RCTs), cluster-RCTs (cRCTs), controlled before-after (CBA) studies, and interrupted time series (ITS) of the effects of increasing the reporting of occupational diseases by physicians. The primary outcome was the reporting of occupational diseases measured as the number of physicians reporting or as the rate of reporting occupational diseases.Data Collection And AnalysisPairs of authors independently assessed study eligibility and risk of bias and extracted data. We expressed intervention effects as risk ratios or rate ratios. We combined the results of similar studies in a meta-analysis. We assessed the overall quality of evidence for each combination of intervention and outcome using the GRADE approach.Main ResultsWe included seven RCTs and five CBA studies. Six studies evaluated the effectiveness of educational materials alone, one study evaluated educational meetings, four studies evaluated a combination of the two, and one study evaluated a multifaceted educational campaign for increasing the reporting of occupational diseases by physicians. We judged all the included studies to have a high risk of bias.We did not find any studies evaluating the effectiveness of Internet-based interventions or interventions on procedures or techniques of reporting, or the use of financial incentives. Moreover, we did not find any studies evaluating large-scale interventions like the introduction of new laws, existing or new specific disease registries, newly established occupational health services, or surveillance systems. Educational materialsWe found moderate-quality evidence that the use of educational materials did not considerably increase the number of physicians reporting occupational diseases compared to no intervention (risk ratio of 1.11, 95% confidence interval (CI) 0.74 to 1.67). We also found moderate-quality evidence showing that sending a reminder message of a legal obligation to report increased the number of physicians reporting occupational diseases (risk ratio of 1.32, 95% CI 1.05 to 1.66) when compared to a reminder message about the benefits of reporting.We found low-quality evidence that the use of educational materials did not considerably increase the rate of reporting when compared to no intervention. Educational materials plus meetingsWe found moderate-quality evidence that the use of educational materials combined with meetings did not considerably increase the number of physicians reporting when compared to no intervention (risk ratio of 1.22, 95% CI 0.83 to 1.81).We found low-quality evidence that educational materials plus meetings did not considerably increase the rate of reporting when compared to no intervention (rate ratio of 0.77, 95% CI 0.42 to 1.41). Educational meetingsWe found very low-quality evidence showing that educational meetings increased the number of physicians reporting occupational diseases (risk ratio at baseline: 0.82, 95% CI 0.47 to 1.41 and at follow-up: 1.74, 95% CI 1.11 to 2.74) when compared to no intervention.We found very low-quality evidence that educational meetings did not considerably increase the rate of reporting occupational diseases when compared to no intervention (rate ratio at baseline: 1.57, 95% CI 1.22 to 2.02 and at follow-up: 1.92, 95% CI 1.48 to 2.47). Educational campaignWe found very low-quality evidence showing that the use of an educational campaign increased the number of physicians reporting occupational diseases when compared to no intervention (risk ratio at baseline: 0.53, 95% CI 0.19 to 1.50 and at follow-up: 11.59, 95% CI 5.97 to 22.49).Authors' ConclusionsWe found 12 studies to include in this review. They provide evidence ranging from very low to moderate quality showing that educational materials, educational meetings, or a combination of the two do not considerably increase the reporting of occupational diseases. The use of a reminder message on the legal obligation to report might provide some positive results. We need high-quality RCTs to corroborate these findings.Future studies should investigate the effects of large-scale interventions like legislation, existing or new disease-specific registries, newly established occupational health services, or surveillance systems. When randomisation or the identification of a control group is impractical, these large-scale interventions should be evaluated using an interrupted time-series design.We also need studies assessing online reporting and interventions aimed at simplifying procedures or techniques of reporting and the use of financial incentives.

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