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Results of global fats and carbs study not very relevant for UK
Conclusion The results of the study have been presented in the media as if they overturn all current dietary guidelines. In the UK at least, that is completely misleading. The study results support the UK guidelines, having found that people who get around 50% of their calories from carbohydrates and 35% from fat, as recommended by Public Health England, were likely to live the longest. There are some limitations to the study, not least that observational studies cannot prove cause and effect. For example, the very low fat and high carbohydrate levels of diets found among some participants in the study might simply repres...
Source: NHS News Feed - August 30, 2017 Category: Consumer Health News Tags: Food/diet Source Type: news

'Fat but fit' people may still be at risk of heart disease
Conclusion This large, valuable study confirms that – as has long been thought – an increased BMI is linked with an increased risk of heart disease. It shows that people with an obese BMI had a higher risk of heart disease, even if they didn't have other risk factors like high cholesterol and high blood pressure, proving that body fat is an independent risk factor. That said, this study does have some limitations. For example, definitions of being metabolically unhealthy aren't entirely consistent with other definitions of metabolic syndrome. This was also only assessed at the start of the study, and risk factors may...
Source: NHS News Feed - August 15, 2017 Category: Consumer Health News Tags: Obesity Source Type: news

Snoring link to Alzheimer ’s disease unproven
Conclusion This relatively large cross-sectional analysis has found a link between certain measures of breathing problems during sleep and poorer cognitive function in middle-aged to older adults. The strengths of this study include its size and use of a prospective sleep study to assess whether people had sleep apnoea or other problems with breathing during sleep. The use of standard cognitive tests is also a strength. However, the study does have its limitations: The study did have mixed findings – while certain measures of problems with breathing during sleep (e.g. oxygen levels) were associated with cognitive outco...
Source: NHS News Feed - July 24, 2017 Category: Consumer Health News Tags: Neurology Lifestyle/exercise Source Type: news

Overweight teen boys have increased risk of stroke in later life
Conclusion The findings of this large longitudinal cohort study seem to demonstrate a link between being overweight aged 20 and an increased risk of stroke. This risk was regardless of whether the boy had been overweight aged 8 or not. There seemed to be no increased risk for boys who were overweight aged 8 but were a normal weight by the age of 20. The study was conducted before the obesity epidemic, and might be even more relevant today. But there are a number of considerations to take into account before we draw any conclusions: Participants were followed up until they were 52-68, so all the strokes occurred at a r...
Source: NHS News Feed - June 29, 2017 Category: Consumer Health News Tags: Obesity Pregnancy/child Source Type: news

Being overweight, not just obese, still carries serious health risks
Conclusion This impressively large global study demonstrates that the prevalence of obesity is increasing worldwide among both children and adults. It supports what has long been thought, that increased body mass index (BMI) contributes to a range of illnesses and is ultimately responsible for a large number of deaths, particularly from cardiovascular disease. One potential limitation is the use of self-reported BMI or health outcome data in some of the studies, although the majority used a specific independent measurement so this is unlikely to have biased results too much. It is also always difficult from observational d...
Source: NHS News Feed - June 13, 2017 Category: Consumer Health News Tags: Obesity Source Type: news

Reported link between diet drinks and dementia and stroke is weak
Conclusion The researchers used data from a large ongoing cohort study to look for links between consumption of sugary and artificially sweetened drinks and risk of stroke or dementia. This cohort study benefits from the large overall sample size, long period of data collection, careful and valid diagnostic assessments, and adjustments for a number of confounders. However, care must be taken when interpreting these results – particularly if latching on to the maximal tripled risk figures reported in the media. There are several points to consider: Small numbers The new number of strokes and dementia in this study was sma...
Source: NHS News Feed - April 21, 2017 Category: Consumer Health News Tags: Food/diet Heart/lungs Neurology Source Type: news

Regular activity may help some people stay 'fat and fit'
Conclusion As people often say, if exercise was a medicine, it would be hailed as a miracle cure. This study suggests that what we already know about the benefits of exercise may extend to reducing risk of cardiovascular disease for middle aged and older people, even if they are overweight or obese. But the study has some limitations. This type of study can't prove that one factor – exercise – is responsible for the lower risk of heart attack and stroke among overweight or obese people who exercise more. It's possible that other factors are important – for example people's income may be linked to their opportuniti...
Source: NHS News Feed - March 2, 2017 Category: Consumer Health News Tags: Obesity Lifestyle/exercise Heart/lungs Source Type: news

Can chocolate make you smarter?
ConclusionStudies suggesting that chocolate is good for us always grab the headlines. However, as is so often the case, the reality is less clear than the headlines suggest.The current study adds to information about the links between diet and brain function – the way our brain processes and manages information. It found that people who scored better than average on these tests said they ate chocolate more often than people who scored worse than average on the tests. But we don't know why that is.There are quite a few limitations to the study. It's cross-sectional, which means we don't know which came first: the chocol...
Source: NHS News Feed - March 9, 2016 Category: Consumer Health News Tags: Food/diet Mental health Source Type: news

The idea you can be fat but fit is 'a myth' study argues
ConclusionThis was a large prospective cohort study from Sweden, which was carried out in young adult males who were then followed for a period of around 29 years. The study found that lower levels of aerobic fitness were associated with risk of early death, but that this risk of death was greater for those with a high BMI, even if they had a high level of aerobic fitness. This study has a number of strengths and limitations. The limitations are that a large number of participants had missing smoking data and therefore it was not possible to control for the confounding effect of smoking. The lower fitness level group with...
Source: NHS News Feed - December 21, 2015 Category: Consumer Health News Tags: Food/diet Obesity Source Type: news

Sugary drinks linked to increased heart failure risk in men
Conclusion This observational study found an association between the consumption of sweetened drinks and risk of heart failure. The study has some strengths, such as the large population size and long follow-up period. However, it has several limitations, which are acknowledged by the researchers. These include the following: The study included middle-aged and elderly men, so the results cannot be generalised to all age groups and genders. The men were all from Sweden, where there is a different typical diet to that of the UK. Researchers collected data on the daily and weekly intake of sweetened drinks in the pa...
Source: NHS News Feed - November 4, 2015 Category: Consumer Health News Tags: Heart/lungs Food/diet Source Type: news

Half a handful of nuts a day 'reduces early death risk'
Conclusion This Dutch cohort of middle-aged to elderly adults generally found people were less likely to die in the following 10 years if they ate a small number of nuts a day compared with none. The study has strengths in its large sample size and that cause of death was followed up for the full cohort using valid medical codes. However, there are various points to bear in mind before we jump to the conclusion that nuts are the magic ingredient that will slash our risk of death. No clear trends It is difficult to draw any clear interpretations about how nut consumption may be associated with risk of death overall or fr...
Source: NHS News Feed - June 12, 2015 Category: Consumer Health News Tags: Food/diet Cancer Heart/lungs Diabetes Source Type: news

Five-year 'death test' for older adults launched online
Conclusion This large study has identified numerous risk factors associated with a person's risk of death within five years. Researchers used this information to develop an online tool that predicts someone's risk of death within the next five years. The study's strengths include its large sample size and the prospective nature of the study design. But there are some limitations. There may be some bias in the type of people who volunteered to take part. The death rate was lower than that of the average population in this age group, which may indicate that the participants were more interested in their health and so had he...
Source: NHS News Feed - June 4, 2015 Category: Consumer Health News Tags: Heart/lungs Cancer Lifestyle/exercise Medical practice Source Type: news

Air pollution linked to silent strokes
Conclusion This cross-sectional study has suggested a link between exposure to small particles in the air (one form of pollution) and the presence of "silent stroke" in older adults – small areas of damage to the brain tissue that are not severe enough to cause obvious symptoms. There are a number of limitations to be aware of when assessing the results of this study: While there was an association between particulate matter in the air and total brain volume, this was no longer statistically significant after taking into account whether people have conditions such as high blood pressure, which can also affec...
Source: NHS News Feed - April 24, 2015 Category: Consumer Health News Tags: Lifestyle/exercise Neurology Source Type: news

Strenuous jogging 'as bad as doing no exercise' claim
Conclusion This study has suggested that light to moderate jogging could be associated with living longer compared with being sedentary, but strenuous jogging might not be. Due to the fact that this data was collected prospectively, there are considerable limitations. The main limitation is that although the total number of joggers was quite high (around 1,000), once these joggers were split up by duration, frequency and pace of jogging, some of the individual groups were much smaller. This was particularly the case in the most active jogging categories (those who jogged more often, for longer, and at a higher pace). This ...
Source: NHS News Feed - February 3, 2015 Category: Consumer Health News Tags: Heart/lungs Lifestyle/exercise Source Type: news

Inactivity 'twice as deadly' as obesity
Conclusion This study’s strengths included its large size and long follow-up period. Researchers also took into account a large number of factors (called confounders) that might have influenced the risk of death, such as diet, smoking history and alcohol intake, although it is still possible that both measured and unmeasured confounders influenced mortality rates. The study had one important limitation. It only measured people’s BMI (calculated by combining their weight and height) and their physical activity once, at the start of the study. It is quite possible that people’s BMI changed over time, and that this wou...
Source: NHS News Feed - January 15, 2015 Category: Consumer Health News Source Type: news

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