Is transformational leadership healthy for employees? A multilevel analysis in 16 nations ** This study examines the potential health promoting and hampering effects of transformational, contingent reward and laissez-faire leadership across 16 countries with a multi-source dataset comprising 93,576 subordinates in 11,177 teams of a large international company. We analyze how leadership climate strength, defined as the shared perceptions of employees concerning their supervisor's leadership behavior, affects individual employees' health and if leaders who are both transformational and transactional have more healthy employees (augmentation effect). In addition, we investigate how national power distance moderates these relationships. The results of multi-level analysis provide strong support for the health promoting effect of transformational leadership (r = .16 to r = .50), contingent reward (r = .14 to r = .48) and the health hampering effect of laissez-faire leadership (r =-.15 to r =-.43) within the analyzed 16 nations. Having a strong transformational leadership climate is also associated with better perceived health in eight countries. Finally, the augmentation effect was significant in six countries and we also found, as expected, that a high power distance strengthens the health promoting effects of transformational leadership. Overall, this study indicates that having a shared vision as well as clear goals, roles and rewards at work is important for promoting employees' health worldwide.

This study investigated the effects of transformational and laissez-faire leadership on leaders' own emotional exhaustion over time. Participants were 2,324 subordinates and 76 supervisors of a services company in Germany. Regression analysis revealed direct longitudinal health-hampering effects of transformational and laissez-faire leadership on leaders' emotional exhaustion. Building on Hobfoll's Conservation of Resources theory (1989), our results showed that the longitudinal health-hampering effects of transformational leadership would be particularly pronounced for leaders with high levels of organization-based self-esteem. Our findings extend the research on potential dark sides of transformational and laissez-faire leadership as well as organization-based self-esteem by focusing on leader-centered outcomes. Theoretical backgroundThe role of transformational and laissez-faire leadership on health and well-being Over the last decades, there has been growing interest in the effects of leadership behaviors on subordinates' health and

What are the best interventions that Work and Organizational Psychology offers today for promoting high work motivation in organizations? This paper seeks to answer this question in two steps. First, we briefly summarize the main findings from 26 meta-analyses concerned with traditional practices such as goal setting, feedback, work design, financial incentives, or training. These practices can improve both organizational performance and the well-being of organizational members. Second, we examine in more depth a new, increasingly important high performance work practice: Employee involvement in organizational leadership (EIOL). This approach is built on theories focusing on organizational participation, shared leadership, and organizational democracy. We also illustrate recently constructed measurement instruments for assessing these constructs. This synopsis leads us to the development of a new integrative, multilevel model of EIOL. The model includes several mediator (e.g., knowledge exchange) and moderator variables (e.g., self-leadership competencies of actors) that explain why and when this approach is effective. We conclude that future research should focus on cross-level interactions of different forms of organizational participation, shared leadership, and organizational democracy, and seek to identify the processes mediating their interplay.

Aim To evaluate long-term clinical response to periodontal therapy and maintenance in localized aggressive periodontitis (LAP). Materials and Methods One hundred forty-one African-Americans diagnosed with LAP, aged 5–25 years, were enrolled. Patients underwent periodontal mechanical debridement plus one week of amoxicillin/metronidazole. Mechanical therapy was repeated as needed and clinical parameters were recorded at baseline, 3, 6, 12, 18, and 24 months, and 2 additional annual follow-up visits after treatment. Radiographs from primary dentition of patients with LAP in permanent dentition, and additional healthy siblings (HS) were analyzed retrospectively. Results Periodontal therapy significantly improved probing depth and clinical attachment level up to 4 years (mean reductions: 2.18 ± 1.03 and 2.80 ± 1.43 mm, respectively). Percentage of affected sites was reduced at all timepoints and maintained up to 4 years. Noncompliance with antibiotics/appointments negatively affected the treatment response. Ninety percent of LAP patients in permanent dentition and 32% of HS presented radiographic bone loss in primary dentition. Conclusions Mechanical debridement with one-week of systemic antibiotics along with proper periodontal maintenance was effective in the treatment and successful maintenance of LAP for up to 4 years. LAP in permanent dentition may be preceded in the primary dentition. Clinicaltrials.gov #NCT01330719.

ObjectivesGlobal prevalence rates of psoriasis differ significantly, with lowest rates in the equator region and increasing tendencies towards the north but also differences within-country. Information on regional variations in Germany is missing. This study aims to analyse the change of psoriasis prevalence in Germany over time and to detect regional variations.DesignCross sectional, spatio-epidemiological study on regional psoriasis prevalence in Germany.SettingClaims data study based on nationwide outpatient billing data on county level.MethodsAnalyses based on outpatient billing data for 2010–2017 derived from all people insured in statutory health insurances (about 72.8 million). We performed descriptive spatio-temporal analyses of prevalence rates using probability mapping and statistical smoothing methods, identified spatial clusters and examined a north-south gradient using spatial statistics.ResultsThe prevalence increased from 147.4 per 10 000 in 2010 to 173.5 in 2017. In 2017, counties’ prevalence rates ranged between 93.8 and 340.9. Decreased rates occurred mainly in southern counties, increased rates in northern and eastern counties. Clusters of low rates occur in southern and south-western Germany, clusters of high rates in the north and north-east. The correlation between counties’ latitudes and their prevalence rates was high with Pearson’s r=0.65 (p<0.05).ConclusionIncreased prevalence of psoriasis over time and marked regional variations in Germany were observed which need further investigation.