Association of activity behaviours and patterns with cardiovascular risk factors in Swiss middle-aged adults: The CoLaus study

Topography of associations between cardiovascular risk factors and myelin loss in the ageing human brain

Our knowledge of the mechanisms underlying the vulnerability of the brain's white matter microstructure to cardiovascular risk factors (CVRFs) is still limited. We used a quantitative magnetic resonance imaging (MRI) protocol in a single centre setting to investigate the cross-sectional association between CVRFs and brain tissue properties of white matter tracts in a large community-dwelling cohort (n = 1104, age range 46-87 years). Arterial hypertension was associated with lower myelin and axonal density MRI indices, paralleled by higher extracellular water content. Obesity showed similar associations, though with myelin difference only in male participants. Associations between CVRFs and white matter microstructure were observed predominantly in limbic and prefrontal tracts. Additional genetic, lifestyle and psychiatric factors did not modulate these results, but moderate-to-vigorous physical activity was linked to higher myelin content independently of CVRFs. Our findings complement previously described CVRF-related changes in brain water diffusion properties pointing towards myelin loss and neuroinflammation rather than neurodegeneration.

Neurovascular disease in Switzerland: 10-year trends show non-traditional risk factors on the rise and higher exposure in women

BACKGROUND

Effective risk factor modification is the prerequisite to prevent neurovascular disease such as stroke or vascular dementia. Non-traditional vascular risk factors (nt-vrf) including stress significantly add to risk of neurovascular disease arising from traditional vascular risk factors (t-vrf). In order to discover sex-specific changes that may underlie previously reported inclines in the prevalence of neuro- and cardiovascular disease in women, we assessed 10-year trends in the prevalence of vrf in Switzerland.

METHODS

We obtained anonymized data from 22'134 participants (51% women) of the governmental Swiss Health Survey, performed every five years (2007, 2012, and 2017). Epidemiological parameters, t-vrf and nt-vrf were analyzed in a cross-sectional study design.

RESULTS

Over the observation period, the number of women having full-time jobs increased considerably (2007: 38%, 2012: 39%, 2017: 44%). This was accompanied by a substantial rise in the prevalence of nt-vrf in women and men (w/m) including stress at work (2007: not available, 2012: 58%/60%, 2017: 66%/65%), low locus of control (w/m: 2007: 21%/19%, 2012: 22%/19%, 2017: 25%/22%), and sleep disorders (w/m: 2007: 30%/22%, 2012: 28%/20%, 2017: 32%/26%). Amongst t-vrf, only the prevalence of obesity and hypercholesterolemia increased over time in both sexes, while other t-vrf remained stable (hypertension [27%], diabetes [5%]) or decreased (smoking [9.4 cigarettes/day]).

CONCLUSIONS

A rise in women's economic participation alongside a higher affection with nt-vrf in the female Swiss population emphasizes the need to improve vascular risk stratification and implement effective preventive measures for neuro- and cardiovascular disease.

Secular trends in cardiovascular risk factors among women aged 45-54 years in Gothenburg, Sweden, from 1980 to 2014

Background

A declining trend in mean cholesterol levels and smoking has been observed in high-income western countries during the last few decades, whereas obesity rates have increased. Simultaneously, mortality from coronary heart disease has decreased. The aim of the present study was to determine whether the trends in cardiovascular risk factors have continued in successive cohorts of middle-aged women over a period of 34 years.

Methods

Six population-based, cross-sectional samples of women (n = 2294) mean age: 49.8 years (range: 45–54), living in Gothenburg, Sweden, were investigated between 1980 and 2014.

Results

Body mass index (BMI) increased over time, with a mean BMI of 24.7 kg/m² in 1980 to 25.7 kg/m² in 2013–2014, corresponding to a weight gain of 4.5 kg, together with an increase in the proportion of obese individuals (BMI ≥ 30 kg/m²) from 10.4 to 16.6% (p = 0.0012). The proportion of smokers and women with hypertension decreased from 34.5 to 12.8% (p = 0.0006) and from 37.7 to 24.5% (p < 0.0001) respectively. Mean total serum cholesterol levels decreased from 6.23 (SD 1.09) mmol/L in 1980 to 5.43 (SD 0.98) mmol/L in 2013–2014 (p < 0.0001). Self-reported leisure time regular exercise increased from 7.8% in 1980 to 35.6% in 2013–2014 (p < 0.0001). For women born in 1963, the prevalence ratio of not having any of five major cardiovascular risk factors was 1.82 (95% confidence interval (CI) 1.38–2.41), compared with women born in 1925–1934.

Conclusion

The trend towards increasing obesity, more leisure-time physical activity and less smoking remains, while the decrease in serum cholesterol appears to have abated.