Uncontrolled before-after studies: discouraged by Cochrane and theEMJ

Discouraged by Peer Excellence

People are exposed to exemplary peer performances often (and sometimes by design in interventions). In two studies, we showed that exposure to exemplary peer performances can undermine motivation and success by causing people to perceive that they cannot attain their peers’ high levels of performance. It also causes de-identification with the relevant domain. We examined such discouragement by ...

Hemodynamic Studies Before and After Instrumental Mitral

surgery and to enhance our understanding of the pathophysiology of mitral stenosis. Although surgery produced a significant increase in calculated mitral valve area, the degree of improvement varied markedly. The younger patients had the greater increase in mitral valve area. The change in cardiac index and pulmonary vascular resistance correlated well with the change in mitral valve area. Only...

Statistical Adjustments and Uncontrolled Studies

Associations Between Acute Conflict and Maternal Care Usage in Egypt: An Uncontrolled Before-and-After Study Using Demographic and Health Survey Data

Background United Nations’ (UN) data indicate that conflict-affected low- and middle-income countries (LMICs) contribute considerably to global maternal deaths. Maternal care usage patterns during conflict have not been rigorously quantitatively examined for policy insights. This study analysed associations between acute conflict and maternal services usage and quality in Egypt using reli...

Discouraged Older Male Workers and the Discouraged Worker Effect

With governments worldwide attempting to increase the labour force participation of older workers in the context of ageing populations, both older workers marginally attached to the labour force (discouraged workers), and those whose labour force participation is affected by cyclical fluctuations (via the discouraged worker effect), are of particular interest to policy makers. Analysis of OECD ...