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A method is described for the calculation of the sum of squares for a second-order interaction. It is then shown that the method is general and can be used for the calculation of the sum of squares for any higher-order interaction.
Methods of correcting for continuity in tests of significance of the difference between correlated proportions are presented. These corrections should increase the range of usefulness of the formulas developed by McNemar (1).
The method of successive intervals is a psychological scaling procedure in which stimuli are classified into successive intervals according to the degree of some defined attribute which they are judged to possess. A psychological continuum is defined and the scale values are then taken as the medians of the distributions of judgments on the psychological continuum. It is assumed that the distributions of judgments for each stimulus are normal on the psychological continuum as defined.
An internal consistency check indicates that the cumulative distributions of empirical judgments for the various stimuli can be reproduced by means of a limited number of parameters with an average error that compares favorably with that usually reported for paired comparison data. Furthermore, the scale values obtained by successive interval scaling, for the data reported, are shown to be linearly related to those obtained by the method of paired comparisons.
This paper discusses and compares the methods of attitude scale construction of Thurstone (method of equal-appearing intervals), Likert (method of summated ratings), and Guttman (method of scale analysis), with special emphasis on the latter as one of the most recent and significant contributions to the field. Despite a certain lack of methodological precision, scale analysis provides a means of evaluating the uni-dimensionality of a set of items. If the criteria for uni-dimensionality are met, the interpretation of rank-order scores is made unambiguous, and efficiency of prediction from the set of items is maximized. The Guttman technique, however, provides no satisfactory means of selecting the original set of items for scale analysis. Preliminary studies indicated that both the Likert and the Thurstone methods tend to select scalable sets of items and that their functions in this respect are complementary. A method of combining the Likert and Thurstone methods in order to yield a highly scalable set of items is outlined. Sets of 14 items selected by the method have, in the two cases where the technique has been tried, yielded very satisfactory scalability.
In response to the COVID-19 pandemic, we rapidly implemented a plasma coordination center, within two months, to support transfusion for two outpatient randomized controlled trials. The center design was based on an investigational drug services model and a Food and Drug Administration-compliant database to manage blood product inventory and trial safety.
Methods:
A core investigational team adapted a cloud-based platform to randomize patient assignments and track inventory distribution of control plasma and high-titer COVID-19 convalescent plasma of different blood groups from 29 donor collection centers directly to blood banks serving 26 transfusion sites.
Results:
We performed 1,351 transfusions in 16 months. The transparency of the digital inventory at each site was critical to facilitate qualification, randomization, and overnight shipments of blood group-compatible plasma for transfusions into trial participants. While inventory challenges were heightened with COVID-19 convalescent plasma, the cloud-based system, and the flexible approach of the plasma coordination center staff across the blood bank network enabled decentralized procurement and distribution of investigational products to maintain inventory thresholds and overcome local supply chain restraints at the sites.
Conclusion:
The rapid creation of a plasma coordination center for outpatient transfusions is infrequent in the academic setting. Distributing more than 3,100 plasma units to blood banks charged with managing investigational inventory across the U.S. in a decentralized manner posed operational and regulatory challenges while providing opportunities for the plasma coordination center to contribute to research of global importance. This program can serve as a template in subsequent public health emergencies.
The National Institute For Health And Care Excellence (NICE) is widely acknowledged as a seminal health technology assessment (HTA) body, known for its transparent and accountable approach to decision-making. This research aimed to investigate the impact of NICE methodology and decisions on international HTA bodies. We sought to identify direct and indirect factors that may influence an international HTA body’s methods or outcomes. To the best of our knowledge, this is the first research to use a qualitative approach to understand the influence of NICE on other HTA bodies.
Methods
We conducted 13 semi-structured qualitative interviews with HTA and market access experts from industry and academia from nine countries (Brazil, Israel, Italy, Japan, Poland, Saudi Arabia, South Korea, Sweden, and the United Arab Emirates). The interview script was organized into three main sections: comparing NICE methods and processes with other HTA bodies; the impact of specific NICE decisions; and Likert scale questions (to allow for comparability of opinions).
Results
Most interviewees believed their local HTA body would consider NICE’s decision when evaluating a medicine. However, the way and extent to which NICE influences HTA varied across countries. The most common means of considering a NICE decision was as background information or context for an HTA evaluation. Generally, interviewees suggested that negative NICE decisions had more impact on local decision-making than positive decisions. Nine of the 13 interviewees agreed or strongly agreed that their country’s HTA body considers the decisions of other HTA bodies in their decision-making process. Eleven of the 13 interviewees agreed or strongly agreed that the development of their country’s HTA body methods and processes was influenced by NICE.
Conclusions
NICE is perceived to be a seminal HTA body, with continued influence on HTA agencies in other countries. However, the mechanisms and extent of this influence varies considerably between countries. We suggest that implicit factors are likely to contribute more to NICE’s influence than individual decisions. Nevertheless, further research is needed to reveal these factors and increase efficiency in international HTA decision-making processes.
There is limited research examining community and neighborhood influences on prosociality in children and youth. In this chapter we outline three relevant theories that address how neighborhood and community processes influence prosocial behavior and review the empirical literature on the topic. Our review suggests that measures of neighborhood socioeconomic status, demography, and disorder have little direct association with prosociality in children and youth but that adolescent prosocial behavior is linked to social capital and collective efficacy. The community intervention evidence shows that providing increased opportunities for prosocial involvement may support greater prosocial behavior of adolescents, possibly by boosting community social capital. Further development of more specific theoretical models and further empirical research is required to better understand the complex neighborhood and community mechanisms across neighborhoods, cities, nations, and cultures.
Excavations at Tiaotou reveal evidence for cultural continuity through the late third to the mid first millennia BC. This research explores shifts in subsistence, production and ritual at Tiaotou, and the emergence of the Pishan-Tiaotou Culture (1200–1000 BC). Tiaotou/Pishan-Tiaotou represents a missing link among Taihu Lake archaeological cultures and contributes to our knowledge of complex political formations and cultural change in Bronze Age southern China.
This chapter sets out the history, evolution of primary health care (PHC) and discusses its application to contemporary health systems. PHC is a whole-of-society approach to health that aims to maximize the level and distribution of health and well-being through three components: primary care and essential public health functions as the core of integrated health services; multisectoral policy and action; and empowered people and communities. The concept of PHC emerged in the 1960s but was formally codified in the 1978 Alma Ata Declaration. ‘Pragmatic’ reductivism and geopolitical transitions in ensuing decades saw original goals superseded by selective PHC. The World Health Report 2008 – Primary Health Care: Now More Than Ever renewed focus on PHC in the prevailing context of hospital-centrism, commercialization and fragmentation. Mounting evidence on effectiveness, equity and efficiency has made it clear that PHC is the path to achieve universal health coverage and the other health related Sustainable Development Goals. In 2018, governments renewed their commitment to strengthen primary health care in the Declaration of Astana.The WHO and UNICEF Operational Framework for PHC provides guidance for governments to translate these commitments into action.
Excavation at Mogou, a Bronze Age cemetery containing over 1700 burials and 6000 individuals, has revealed a diverse range of multiple burials. Building on this dataset, the Mogou Multidisciplinary Investigation Project aims to explore connections between kinship, burial space and social organisation in Bronze Age north-west China.