Here are five papers mostly looking at aspects of overweight.  The first, published recently in the Lancet, is a huge study on the effects of body-mass index (BMI) on subsequent mortality in nearly 900,000 adults.  It shows progressive excess mortality above the BMI range 22.5-25 kg/m2.  (To calculate your BMI click here).  At 40-45 kg/m2, the reduction in life expectancy of 8-10 years is comparable to the effects of being a smoker.  The second paper, by Neovius et al, also involved large numbers - over 45,000 older adolescents.  Again it showed excess mortality at long term follow-up, and commented "Obesity and overweight were as hazardous as heavy and light smoking, respectively".  The third study by Katseva et al looked at modifiable risk factors in European patients with cardiac disease.  The findings were depressing with obesity, for example, increasing stepwise from 25% at first survey, to 32.6% at second, to 38% at third survey.  Overall the authors concluded "These time trends show a compelling need for more effective lifestyle management of patients with coronary heart disease ... To salvage the acutely ischaemic myocardium without addressing the underlying causes of the disease is futile; we need to invest in prevention." 

This set of five papers documents, in part, our mixed viewpoints on depression.  Worryingly, Mehta & colleagues show deteriorating public attitudes towards mental illness in England (and to a lesser extent Scotland) between 1994 and 2003.  Meanwhile Blumner et al demonstrate a shift towards a more biological view on causes and treatment of depression in the US between 1996 and 2006.

In contrast, Miranda et al's editorial (and Grote et al's research) highlight the growing evidence showing psychotherapies for depression can be "very effective for low-income and minority populations in the United States and abroad" - extending their validity well beyond more privileged groups in developed countries.  Andersson too discusses a further way to make psychotherapies more widely available and helpful - in this case, the increasing literature documenting the widespread value of delivering cognitive behavioural therapy via the internet.     

Here are five papers on childhood, the effects childhood experience can have on adulthood, and the effects adults may then have on their own children.  The first paper by Brody et al. is the encouraging one.  It demonstrates how caring parenting can combat genetic vulnerability - "involved-supportive" mothering greatly reduced the link between vulnerable genes and subsequent youth substance abuse.  The Van Meurs et al study shows the reverse - how problem behaviours in one generation of children increases the likelihood that, when these children become parents themselves, their own children will develop similar problem behaviours.

Here are five papers on difficulties experienced by adolescents.  A couple of the papers are follow-up studies.  Colman et al looked at the multiple negative personal & relationship outcomes in a UK national cohort of adolescents with conduct problems followed over 40 years.  Wentz et al studied the somewhat more encouraging 18 year outcomes of a group of adolescents suffering from anorexia. 

A couple of the papers are about depression.  Kennard and colleagues report again on the well-known Treatment for Adolescents with Depression Study (TADS) comparing antidepressants, cognitive-behavioural therapy and combined treatment.  By about six months there was little difference between the three forms of treatment.  At nine months the remission rate for intent-to-treat cases was 60% overall.  Primack et al investigated the association between electronic media use in adolescence and subsequent depression in young adulthood.  They reported "Controlling for all covariates including baseline Center for Epidemiologic Studies-Depression Scale score, those reporting more television use had significantly greater odds of developing depression."

Here are five papers on lifestyle and the benefits of making healthy choices.  The first by Cohen et al on sleep habits and susceptibility to the common cold, showed increased risk of developing a cold after infection for those with shorter sleep duration.  Interestingly the increased risk was even greater for those with poor sleep efficiency.  Sleep efficiency is calculated by dividing the time spent asleep by the time spent in bed trying to sleep.  The Good Knowledge section of this website contains useful information on assessing and treating sleep difficulties.

Here are half a dozen papers with anxiety relevance.  The first couple are about the interaction between genetic vulnerability (or resilience) and childhood experience.  The Stevens et al paper is an update on the large body of research looking at psychological genetic vulnerability/resilience in macaque monkeys and how this interacts with parenting quality to lead, or not lead, to emotional and neurophysiological disturbances in adulthood.  The Battaglia paper particularises this gene/environment investigation by looking at the connections between early human childhood separation anxiety, loss of a parent, and panic disorder in adulthood.  

I seem to be making a habit this month of focusing on a specific journal when posting the weekly report on interesting recent research.  Last week it was the Journal of Personality and Social Psychology  .  This week it's the Journal of Positive Psychology .  To quote the Journal's website: "Positive psychology is about scientifically informed perspectives on what makes life worth living. It focuses on aspects of the human condition that lead to happiness, fulfillment, and flourishing."  First published in 2006, the journal initially came out quarterly.  Now, in 2009, it's increasing its publication frequency to six issues a year - a pleasing sign of the increasing interest in this field.

I routinely scan quite a few journals every month.  Sometimes it's disappointing and there's nothing in the issue of a particular journal that interests me much.  Sometimes a particular journal contains a bunch of stimulating articles.  January's edition of the Journal of Personality and Social Psychology was a good find.  Below are four papers from it.  The DeWall et al study is on how social exclusion leads to hostility and aggression.  It adds to the large body of research on the very powerful effects of being socially rejected.  Putting "rejection (psychology)" into the top search bar of PubMed today and clicking on "Go" pulls out 2,741 paper

Here are half a dozen papers relevant to psychotherapy.   The first two throw some light on the question of whether it matters which form of established psychotherapy one uses to treat a particular depression sufferer - bearing in mind Cuijpers et al's recent meta-analysis suggesting that " ...

Here are a couple of studies on the prevalence of depression and anxiety, and four on risk factors for depression, bipolar disorder and suicide.  Strine et al report on a major survey of depression and anxiety in the United States.  They found "The overall prevalence of current depressive symptoms was 8.7% (range by state and territory, 5.3%-13.7%); of a lifetime diagnosis of depression, 15.7% (range, 6.8%-21.3%); and of a lifetime diagnosis of anxiety, 11.3% (range, 5.4%-17.2%)."  Smoking, lack of exercise, and excessive drinking were all associated with increased likelihood of mental disorders, as too was physical ill health.  Young et al, in a separate study, looked at the likelihood of depression and anxiety becoming persistent.  They estimated - at nearly 3 year follow-up - that the US prevalence of persistent depressive or anxiety disorder was 4.7%.  Only about a quarter of these sufferers were using appropriate medication and only about a fifth appropriate counselling.