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Little is known about the epidemiology of adult attention-deficit hyperactivity disorder (ADHD). To estimate the prevalence and correlates of DSM-IV adult ADHD in the World Health Organization World Mental Health Survey Initiative. An ADHD screen was administered to respondents aged 18-44 years in ten countries in the Americas, Europe and the Middle East (n=11422). Masked clinical reappraisal interviews were administered to 154 US respondents to calibrate the screen. Multiple imputation was used to estimate prevalence and correlates based on the assumption of cross-national calibration comparability. Estimates of ADHD prevalence averaged 3.4% (range 1.2-7.3%), with lower prevalence in lower-income countries (1.9%) compared with higher-income countries (4.2%). Adult ADHD often co-occurs with other DSM-IV disorders and is associated with considerable role disability. Few cases are treated for ADHD, but in many cases treatment is given for comorbid disorders. Adult ADHD should be considered more seriously in future epidemiological and clinical studies than is currently the case.

This article provides a critical review of studies assessing the effects of unintended pregnancy on the health of infants, children, and parents in developed and developing countries. A framework for determining and measuring the pathways between unintended pregnancy and future health outcomes is outlined. The review highlights persistent gaps in the literature, indicating a need for more studies in developing countries and for further research to assess the impact of unintended pregnancy on parental health and long-term health outcomes for children and families. The challenges in measuring and assessing these health impacts are also discussed, highlighting avenues in which further research efforts could substantially bolster existing knowledge.

To use new data to make a revised estimate of the global burden of typhoid fever, an accurate understanding of which is necessary to guide public health decisions for disease control and prevention efforts. Population-based studies using confirmation by blood culture of typhoid fever cases were sought by computer search of the multilingual scientific literature. Where there were no eligible studies, data were extrapolated from neighbouring countries and regions. Age-incidence curves were used to model rates measured among narrow age cohorts to the general population. One-way sensitivity analysis was performed to explore the sensitivity of the estimate to the assumptions. The burden of paratyphoid fever was derived by a proportional method. A total of 22 eligible studies were identified. Regions with high incidence of typhoid fever (>100/100,000 cases/year) include south-central Asia and south-eastAsia. Regions of medium incidence (10-100/100,000 cases/year) include the rest of Asia, Africa, Latin America and the Caribbean, and Oceania, except for Australia and New Zealand. Europe, North America, and the rest of the developed world have low incidence of typhoid fever (<10/100,000 cases/year). We estimate that typhoid fever caused 21,650,974 illnesses and 216,510 deaths during 2000 and that paratyphoid fever caused 5,412,744 illnesses. New data and improved understanding of typhoid fever epidemiology enabled us to refine the global typhoid burden estimate, which remains considerable. More detailed incidence studies in selected countries and regions, particularly Africa, are needed to further improve the estimate.

To what extent does the national religious context affect volunteering? Does a religious environment affect the relation between religiosity and volunteering? To answer these questions, this study specifies individual level, contextual level, and cross-level interaction hypotheses. The authors test the hypotheses by simultaneously studying the impact of religiosity of individuals, the national religious context, and their interplay on volunteering while controlling for possible confounding factors both at individual and contextual levels. Based on multilevel analyses on data from 53 countries, frequent churchgoers are more active in volunteer work and a devout national context has an additional positive effect. However, the difference between secular and religious people is substantially smaller in devout countries than in secular countries. Church attendance is hardly relevant for volunteering in devout countries. Furthermore, religious volunteering has a strong spillover effect, implying that religious citizens also volunteer more for secular organizations. This spillover effect is stronger for Catholics than for Protestants, non-Christians and nonreligious individuals.

Using both quantitative and qualitative methods, this study contrasted employees' job stress perceptions and their relationships to strains in China and the United States. Significant job stressor-strain correlations were found in both countries. However, hierarchical regression analyses revealed significant interactions of country by job stressors in predicting job strains, indicating the unique patterns of stressor-strain relationships in China and the United States. In the qualitative analyses, American employees reported significantly more incidents of lack of job control, direct interpersonal conflict, lack of team coordination, anger, frustration, feeling overwhelmed, and stomach problems than the Chinese. Chinese employees reported significantly more incidents of job evaluations, work mistakes, indirect conflict, employment conditions, lack of training, anxiety, helplessness, sleep problems, and feeling hot than the Americans. The qualitative approach contributed above and beyond the quantitative results in that it revealed culture-specific job stressors of job evaluations, work mistakes, and indirect conflict that had been overlooked in western-based stress research.

This article reviews 98 aggregate and multilevel studies examining the associations between income inequality and health. Overall, there seems to be little support for the idea that income inequality is a major, generalizable determinant of population health differences within or between rich countries. Income inequality may, however, directly influence some health outcomes, such as homicide in some contexts. The strongest evidence for direct health effects is among states in the United States, but even that is somewhat mixed. Despite little support for a direct effect of income inequality on health per se, reducing income inequality by raising the incomes of the most disadvantaged will improve their health, help reduce health inequalities, and generally improve population health.

Objective. This article presents a cross-national examination of gender variations in environmental behaviors. Research on environmental concern reveals modest distinctions between men and women, with women typically displaying higher levels of environmental concern and behavioral adjustments relative to men. Additionally, some prior research suggests that women appear more engaged in householdoriented (private) pro-environment behaviors (e.g., recycling), and men in community/society-oriented (public) pro-environment behaviors (e.g., protests). The analysis provided here offers an important extension to existing research through its cross-cultural, comparative perspective. Method. We make use of the 1993 International Social Survey to explore gender differences in \"private\" and \"public\" environmentally-oriented behaviors across 22 nations. Results. It is shown that women tend to engage in more environmental behaviors than men in many nations, particularly private behaviors. In addition, both women and men tend to engage in relatively more private environmental behaviors as opposed to public ones. Conclusion. The cross-national analysis provides support for gender distinctions with regard to some environmental behaviors within most of the incorporated 22 national contexts. Gender differences in level of private environmental behaviors tend to be more consistent within nations at the upper end of the wealth distribution.

A meta-analysis was conducted to estimate the true correlation between attitudinal organizational commitment and job performance and to identify moderators of this correlation. One-hundred and eleven samples from 93 published studies were included. The corrected mean correlation was 0.20. The correlation was at least marginally significantly stronger for: (a) extra-role performance as opposed to in-role performance; (b) white-collar workers as opposed to blue-collar workers; and (c) performance assessed by self ratings as opposed to supervisor ratings or objective indicators. Four other assumed moderators (commitment measure: Affective Commitment Scale versus Organizational Commitment Questionnaire, job level, age, and tenure) did not have at least marginally significant effects.

Decentralized government institutions are doing more of the work of government than ever before, but there is little agreement about 1) what decentralizations, or 2) how it should be measured. To overcome this confusion, this article builds on standard definitions of decentralization that include three core dimensions: fiscal, administrative, and political. The article offers an empirical test of that definition using factor analysis of data from 1996 for 68 countries. Factor analysis confirms these three core dimensions and generates a score for each case in each dimension, allowing countries to be measured according to their type and degree of decentralization. In future work, these scores can be used for hypothesis testing about the causes and effects of decentralization on important social outcomes. This exercise demonstrates that conceptual confusion need not hamper research when empirical tests can help verify conceptual categories. [PUBLICATION ABSTRACT]

This paper investigates public attitudes toward welfare state policies as a result of both situational, i.e. unemployment, and ideological factors, i.e. egalitarian ideology, at both the individual and national level. The dependent variables are public support for the sick and the old as well as for the unemployed as target beneficiaries of welfare state policies. Data from the ISSP study 'Role of Government' are analysed using a multi-level regression technique. Findings indicate that the National level is important in shaping public attitudes toward welfare state policies in industrialized nations, and that both situational and ideological factors play a role. Apparently, various nations generate different public beliefs about national social problems and about the relationship between individuals, the state and other institutions. Eventually, these understandings and beliefs influence popular attitudes regarding what kind of policies the state should pursue, and who should benefit.