Worldwide trends in underweight and obesity from 1990 to 2022: a pooled analysis of 3663 population-representative studies with 222 million children, adolescents, and adults

Background Underweight and obesity are associated with adverse health outcomes throughout the life course. We estimated the individual and combined prevalence of underweight or thinness and obesity, and their changes, from 1990 to 2022 for adults and school-aged children and adolescents in 200 countries and territories. Methods We used data from 3663 population-based studies with 222 million participants that measured height and weight in representative samples of the general population. We used a Bayesian hierarchical model to estimate trends in the prevalence of different BMI categories, separately for adults (age ≥20 years) and school-aged children and adolescents (age 5–19 years), from 1990 to 2022 for 200 countries and territories. For adults, we report the individual and combined prevalence of underweight (BMI <18·5 kg/m2) and obesity (BMI ≥30 kg/m2). For schoolaged children and adolescents, we report thinness (BMI <2 SD below the median of the WHO growth reference) and obesity (BMI >2 SD above the median). Findings From 1990 to 2022, the combined prevalence of underweight and obesity in adults decreased in 11 countries (6%) for women and 17 (9%) for men with a posterior probability of at least 0·80 that the observed changes were true decreases. The combined prevalence increased in 162 countries (81%) for women and 140 countries (70%) for men with a posterior probability of at least 0·80. In 2022, the combined prevalence of underweight and obesity was highest in island nations in the Caribbean and Polynesia and Micronesia, and countries in the Middle East and north Africa. Obesity prevalence was higher than underweight with posterior probability of at least 0·80 in 177 countries (89%) for women and 145 (73%) for men in 2022, whereas the converse was true in 16 countries (8%) for women, and 39 (20%) for men. From 1990 to 2022, the combined prevalence of thinness and obesity decreased among girls in five countries (3%) and among boys in 15 countries (8%) with a posterior probability of at least 0·80, and increased among girls in 140 countries (70%) and boys in 137 countries (69%) with a posterior probability of at least 0·80. The countries with highest combined prevalence of thinness and obesity in school-aged children and adolescents in 2022 were in Polynesia and Micronesia and the Caribbean for both sexes, and Chile and Qatar for boys. Combined prevalence was also high in some countries in south Asia, such as India and Pakistan, where thinness remained prevalent despite having declined. In 2022, obesity in school-aged children and adolescents was more prevalent than thinness with a posterior probability of at least 0·80 among girls in 133 countries (67%) and boys in 125 countries (63%), whereas the converse was true in 35 countries (18%) and 42 countries (21%), respectively. In almost all countries for both adults and school-aged children and adolescents, the increases in double burden were driven by increases in obesity, and decreases in double burden by declining underweight or thinness. Interpretation The combined burden of underweight and obesity has increased in most countries, driven by an increase in obesity, while underweight and thinness remain prevalent in south Asia and parts of Africa. A healthy nutrition transition that enhances access to nutritious foods is needed to address the remaining burden of underweight while curbing and reversing the increase in obesit

Accounting, slavery and social history: The legacy of an eighteenth-century Portuguese chartered company

Based on extensive archival research, this study documents and analyses the accounting techniques that the Companhia Geral do Grão Pará e Maranhão applied to its slave trading operations during the second half of the eighteenth century. The surviving accounting records of this Portuguese chartered company reveal – in meticulous detail – the integral role that accounting technology played in enabling the slave trade to flourish. However, and paradoxically, while evidencing this culpability the same accounting records also document the essential humanity of the slaves and preserve details of the bleak circumstances of their existence. Slaves are typically lamented as a lost people consigned to a tragic and an eternal anonymity, but it is from accounting records that many aspects of their lives can be reconstructed. In this way, the accounting records studied are also shown to provide a latent source of social history that constitutes a profound mea culpa. © 2017, © The Author(s) 2017

The Effects of Conflict Types, Dimensions, and Emergent States on Group Outcomes

In this study, we examine three types of conflict (task, relationship, and process) and four dimensions of conflict (emotions, norms, resolution efficacy, and importance) in decision making groups. We also investigate emergent states (e.g., trust, respect, cohesiveness; Marks et al. 2001; Acad Manag Rev 26: 530-547) as mediating the effects of the conflict types and dimensions on group outcomes (productivity and viability). All three types of conflict decreased positive emergent states in groups and this led to a decrease in group viability (the ability of a team to retain its members through their satisfaction and willingness to continue working together; Balkundi and Harrison 2006; Acad Manag J 49: 49-68). This effect was alleviated by resolution efficacy (the belief that the conflict can be easily resolved) regarding process conflict, but could be exacerbated by any negative emotion associated with relationship conflict. Norms that encouraged task conflict also increased positive emergent states within groups, which marginally and positively influenced group performance