Introduction The built environment is constantly changing. Whether it be short-term changes - e.g. roadworks, or long-term, e.g. a new road. These changes can impact exposures (air pollutants from road traffic), behaviours (decision to drive to work) or health (risk of being in a traffic accident). It’s therefore important to monitor the changes to the built environment so that interventions can be developed to reduce risk to health either directly or indirectly (exposure/behaviour).
Background There are two parts required to conduct a study on health and place across the lifecourse: Longitudinal information on the environment Information on residential location This blog post focusses on the latter. This information might be collected prospectively via routine administrative records (e.g. GP location), which could be linked to health records. However, for a number of research questions we might want to also use non-routinely collected information (e.
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Background Social media is becoming the dominant platform for getting information, for the general population by superseding television and newspapers and increasingly for academics, displacing peer-reviewed journal articles. Time is limited and short communications are easier to digest, especially when on a mobile. To summarise findings from a research project or engage in an academic/policy debate in very short social media snippets is an impressive skill and one that I am keen to learn.
Introduction The ‘Revoke article 50 and remain in the EU petition’ is the most popular petition ever, which aims to stop the brexit process. The rules are that after 10,000 signatures, petitions get a response from the government, after 100,000 signatures, petitions are considered for debate in Parliament and after 17.4 million, we stop Brexit (Andrea Leadsom, 2019). As of writing this (25/03/19 17:00 GMT), the petition has amassed over 5 million signatures.
Background I went on a course in Cambridge over the summer of 2018. This was to get me up to speed on structural equation modelling (SEM), which has a lot of potential applications in scenarios where the pathways between measured and unmeasured variables are the central focus of the research question.
What is SEM? SEM is a mixture of confirmatory factor analysis (CFA) and path analysis. Another way to describe that, is that you have a measurement part and a structural part.
Background Are you collecting lots of geospatial data and need a way to quickly visualise what you’ve got? Read on! I had this problem; I was collecting a lot of information on my daily movements from Arc App: Location and Activity (more on the use of Arc for research later). Additionally, I wanted to quickly see what features of the urban environment (e.g. greenspaces) I was being ‘exposed’ to. The solution was Uber’s open source geospatial analysis tool: Kepler.
Background I am keen to employ technology to assist in teaching. I went to the Social Science and Medicine Annual Scientific meeting in Glasgow last September and noticed that they were using software to get responses from the audience. The software was called Mentimeter. It turns out there has been a paper published by researchers from the University of Glasgow on the merits of interactive polling for teaching. The authors summarise that experiences of this technology are generally positive but caution that future use should focus first on the pedagogical approach.
Background Longitudinal analysis is important as due to the temporal sequence of exposure then outcome, we can make a stronger case for causality. A derivative of a class of models that fit into the ‘data-mining’ family is sequence analysis. One use of this model is to understand lifetime states, e.g. being employed, being in education, being retired. By understanding these state sequences we can understand how the duration and timing of a state can affect health in the long term.
Background Group-based trajectory modelling (GBMT) is a way of identifying latent patterns of change from multiple individual trajectories. It is widely used within the field of economics and also becoming popular in health geography. The process of deciding the number of classes is not transparent and tends to be based on one or two model fit statistics. Klijn et al., created a fit-criteria assessment plot (F-CAP) that accepts universal data input to aid the decision on the number of classes (2017).
Background The Social Fragmentation Index (SFI) was developed by Peter Congdon. The indicator aims to use census variables to capture (for small areas across the country) aspects of the local population that may reflect a greater collective risk of social fragmentation/lack of social cohesion. The census variables are proxies for these risk factors, rather than ‘direct’ indicators. It focusses on risk due to potentially high levels of isolation and residential instability of members of the population.