Sophia Zollner-Kiechl

Dr. Sophia Zollner-Kiechl

orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 May 2023 in EBioMedicine
Verified
Journal Article
Open access
YLYao Lu
Yao Lu
SZSophia Zollner-Kiechl
Sophia Zollner-Kiechl
JWJie Wang
Jie Wang
QXQingbo Xu
Qingbo Xu
SKStefan Kiechl
Stefan Kiechl
GGGlobal Pulse Wave Velocity Study Group
Global Pulse Wave Velocity Study Group
Arterial stiffening is central to the vascular ageing process and a powerful predictor and cause of diverse vascular pathologies and mortality. We investigated age and sex trajectories, regional differences, and global reference values of arterial stiffness as assessed by pulse wave velocity (PWV). Measurements of brachial-ankle or carotid-femoral PWV (baPWV or cfPWV) in generally healthy participants published in three electronic databases between database inception and August 24th, 2020 were included, either as individual participant-level or summary data received from collaborators (n = 248,196) or by extraction from published reports (n = 274,629). Quality was appraised using the Joanna Briggs Instrument. Variation in PWV was estimated using mixed-effects meta-regression and Generalized Additive Models for Location, Scale, and Shape. The search yielded 8920 studies, and 167 studies with 509,743 participants from 34 countries were included. PWV depended on age, sex, and country. Global age-standardised means were 12.5 m/s (95% confidence interval: 12.1-12.8 m/s) for baPWV and 7.45 m/s (95% CI: 7.11-7.79 m/s) for cfPWV. Males had higher global levels than females of 0.77 m/s for baPWV (95% CI: 0.75-0.78 m/s) and 0.35 m/s for cfPWV (95% CI: 0.33-0.37 m/s), but sex differences in baPWV diminished with advancing age. Compared to Europe, baPWV was substantially higher in the Asian region (+1.83 m/s, P = 0.0014), whereas cfPWV was higher in the African region (+0.41 m/s, P < 0.0001) and differed more by country (highest in Poland, Russia, Iceland, France, and China; lowest in Spain, Belgium, Canada, Finland, and Argentina). High vs. other country income was associated with lower baPWV (-0.55 m/s, P = 0.048) and cfPWV (-0.41 m/s, P < 0.0001). China and other Asian countries featured high PWV, which by known associations with central blood pressure and pulse pressure may partly explain higher Asian risk for intracerebral haemorrhage and small vessel stroke. Reference values provided may facilitate use of PWV as a marker of vascular ageing, for prediction of vascular risk and death, and for designing future therapeutic interventions. This study was supported by the excellence initiative VASCage funded by the Austrian Research Promotion Agency, by the National Science Foundation of China, and the Science and Technology Planning Project of Hunan Province. Detailed funding information is provided as part of the Acknowledgments after the main text.

2 February 2024 in European Journal of Neurology
Verified
Journal Article
Open access
AKAnel Karisik
Anel Karisik
BDBenjamin Dejakum
Benjamin Dejakum
KMKurt Moelgg
Kurt Moelgg
SFSilvia Felicetti
Silvia Felicetti
TTThomas Toell
Thomas Toell
FGfor the STROKE‐CARD Registry study group
for the STROKE‐CARD Registry study group
Background and purpose: Dysphagia is associated with poor outcome, higher mortality, reduced quality of life, and social isolation. We investigate the relationship between swallowing impairment and symptoms of anxiety and depression after ischemic stroke.Methods: Consecutive patients with ischemic stroke participating in the prospective STROKE‐CARD Registry study from 2020 to 2022 were assessed for dysphagia on hospital admission (clinical swallowing assessment) and for persistence until discharge and 3‐month follow‐up (SINGER Independency Index). Anxiety and depression symptoms were recorded using Beck Depression Inventory (BDI) and Hospital Anxiety and Depression Scale (HADS) at 3‐month follow‐up.Results: Of 648 patients, 19.3% had dysphagia on admission, persisting in 14.8% at discharge and 6.8% at 3‐month follow‐up. With the presence or duration of dysphagia (no dysphagia, dysphagia at baseline, at discharge, at 3 months), score (mean ± SD) increased on the BDI (7.9 ± 6.7, 12.5 ± 8.7, 13.5 ± 9.0, 16.5 ± 10.2), HADS‐D (4.4 ± 3.7, 7.1 ± 4.2, 7.7 ± 4.4, 9.8 ± 4.3), and HADS‐A (4.4 ± 3.5, 5.4 ± 3.6, 6.0 ± 3.6, 7.0 ± 3.6). In linear regression analysis adjusting for age, sex, diabetes, dementia, and either functional disability or stroke severity, BDI and HADS‐D scores were significantly higher in patients with dysphagia across all points in time (admission, discharge, 3‐month follow‐up). An independent association with HADS‐A scores was only evident in patients with persisting dysphagia after 3 months. Patients with dysphagia were more likely to receive antidepressants, antipsychotics, or benzodiazepines at discharge and 3‐month follow‐up.Conclusions: Dysphagia after stroke is common and severely affects psychosocial functioning of individuals. Our results highlight swallowing impairment as an independent predictor for poststroke depressive and, to a lesser extent, anxiety symptoms.

22 February 2024 in European Journal of Pediatrics
Verified
Journal Article
Open access
PDF file
AMAlex Messner
Alex Messner
Johannes NairzJohannes Nairz
Johannes Nairz
SZSophia Zollner-Kiechl
Sophia Zollner-Kiechl
BWBernhard Winder
Bernhard Winder
RPRaimund Pechlaner
Raimund Pechlaner
HOHannah Oberhammer
Hannah Oberhammer
The objectives of this study were to develop age- and sex-specific reference percentiles for fat mass index (FMI) and fat-free mass index (FFMI) in adolescents aged 14 to 19 years and to determine differences in overweight/obesity classification by FMI and body mass index (BMI). The EVA4YOU study is a single-center cross-sectional study conducted in western Austria. Cardiovascular risks including anthropometric measurements and bioelectrical impedance analysis were assessed in adolescents (mean age 17 years). FMI and FFMI were calculated as the ratio of fat mass (FM) and fat-free mass (FFM) to the square of height and compared to study population–specific BMI percentiles. One thousand four hundred twenty-two adolescents were included in the analysis. Girls had a significantly higher mean FM and FMI and a significantly lower mean FFM, FFMI (p < 0.001, each), and mean BMI (p = 0.020) than boys. Body composition classification by FMI and BMI percentiles shows a concordance for the < 75th and > 97th percentile, but a significant difference in percentile rank classifications between these two cut-off values (all p < 0.05). Based on FMI, 15.5% (221/1422) of the whole population and 29.4% (92/313) of those between the 75th and 97th percentiles are classified one category higher or lower than those assigned by BMI. Conclusion: Classification of normal or pathologic body composition based on BMI and FMI shows good accordance in the clearly normal or pathologic range. In an intermediate range, FMI reclassifies categories based on BMI in more than a quarter of adolescents. Cut-off values to differentiate normal from pathologic FMI values on a biological basis are needed.Trial registration: The study is registered at www.clinicaltrials.gov (Identifier: NCT04598685; Date of registration: October 22, 2020). What is Known:• Chronic non-communicable diseases (NCDs) are the leading cause of morbidity and mortality globally, with major risk factors including unhealthy diets, harmful behaviors, and obesity. Obesity in children and adolescents is a key risk factor for later NCDs, which is commonly measured by Body Mass Index (BMI).• BMI can be misleading as it doesn't distinguish between fat mass (FM) and fat-free mass (FFM), leading to potential misclassification of obesity in children. Previous studies have already suggested the use of the Fat Mass Index (FMI) and Fat-Free Mass Index (FFMI) as a more accurate measures of body composition. What is New:• This study adds the first age- and sex-specific reference values for FMI and FFMI in Austrian adolescents using bioelectrical impedance analysis (BIA) as a safe and secure measurement method of a large representative cohort.• We found percentile misclassification between BMI and FMI when categorizing for obesity, especially in intermediate categories of body composition. Furthermore, when comparing the new reference values for FMI and FFMI to existing ones from the US, UK, and Germany we could show a good alignment within the European cohorts and major differences with American values, indicating and confirming the difference of FMI and FFMI for different populations of different ethnical background, living on different continents.

21 September 2021 in Journal of the American Heart Association
Verified
Journal Article
Open access
PDF file
SZSophia Zollner-Kiechl
Sophia Zollner-Kiechl
ASAnna Staudt
Anna Staudt
KSKatharina Stock
Katharina Stock
NGNina Gande
Nina Gande
BBBenoît Bernar
Benoît Bernar
CSChristina Schreiner
Christina Schreiner
Background: Cardiovascular disease depends on the duration and time course of risk factor exposure. Previous reports on risk factors of progression of carotid intima‐media thickness (cIMT) in the young were mostly restricted to high‐risk populations or susceptible to certain types of bias. We aimed to unravel a risk factor signature for early vessel pathology based on repeated ultrasound assessments of the carotid arteries in the general population. Methods and Results: Risk factors were assessed in 956 adolescents sampled from the general population with a mean age of 15.8±0.9 years, 56.2% of whom were female. cIMT was measured at baseline and on average 22.5±3.4 months later by high‐resolution ultrasound. Effects of baseline risk factors on cIMT progression were investigated using linear mixed models with multivariable adjustment for potential confounders, which yielded significant associations (given as increase in cIMT for a 1‐SD higher baseline level) for alanine transaminase (5.5 μm; 95% CI: 1.5–9.5), systolic blood pressure (4.7 μm; 0.3–9.2), arterial hypertension (9.5 μm, 0.2–18.7), and non‐high‐density (4.5 μm; 0.7–8.4) and low‐density lipoprotein cholesterol (4.3 μm; 0.5–8.1). Conclusions: Systolic blood pressure, arterial hypertension, low‐density and non‐high‐density lipoprotein cholesterol, and alanine transaminase predicted cIMT progression in adolescents, even though risk factor levels were predominantly within established reference ranges. These findings reemphasize the necessity to initiate prevention early in life and challenge the current focus of guideline recommendations on high‐risk youngsters. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03929692.

1 January 2022 in Journal of Adolescent Health
Verified
Journal Article
Closed access
SZSophia Zollner-Kiechl
Sophia Zollner-Kiechl
ASAnna Staudt
Anna Staudt
KSKatharina Stock
Katharina Stock
NGNina Gande
Nina Gande
BBBenoît Bernar
Benoît Bernar
UKUrsula Kiechl-Kohlendorfer
Ursula Kiechl-Kohlendorfer

1 September 2025 in bioRxiv
Verified
Preprint
Open access
CHChiara Ms Herzog
Chiara Ms Herzog
CVCharlotte Vavourakis
Charlotte Vavourakis
ERElisa Redl
Elisa Redl
MHMagdalena Hagen
Magdalena Hagen
GKGabriel Knoll
Gabriel Knoll
MWMartin Widschwendter
Martin Widschwendter
Summary: Extending human healthspan requires understanding how lifestyle interventions impact molecular systems across tissues and time. Here, we present the TirolGESUND Lifestyle Atlas (ClinicalTrials.gov: NCT05678426 ), a longitudinal, multi-modal resource profiling 156 healthy women (aged 30-60 years) undergoing 6-month intermittent fasting (n=114) or smoking cessation (n=42) interventions. Participants were sampled up to four times across seven tissues and fluids, generating >3,450 biospecimens with harmonised DNA methylation, metabolomics, microbiome, and immune profiling, alongside skin histology, barrier measurements, and rich clinical metadata. We demonstrate the utility of this dataset through: (i) multi-omics-wide association studies linking traits to molecular features; (ii) integrative factor modelling revealing coordinated cross-tissue signatures; (iii) epigenetic-biomarker cross-omic associations, and (iv) CpG-level variance decomposition mapping stable, individual-specific, tissue-restricted, and intervention-responsive methylation patterns. We further show that ageing-linked features are selectively malleable: highly compliant intermittent fasting participants exhibited attenuated or even age-opposing molecular trajectories within six months. The atlas enables unprecedented within-cohort comparisons across omic layers and tissues, supporting discovery of context-dependent biomarkers, cross-system coordination, and intervention responsiveness. Data are available via an interactive portal, with sensitive data under controlled access ( https://eutops.github.io/lifestyle-atlas/ ). This resource provides a foundation for exploring biomarker association and multi-tissue epigenetics, enabling hypothesis generation and benchmarking for systems biology and human healthspan research. Graphical Highlights: Multi-tissue multi-modal profiling of two clinically-relevant lifestyle interventions in 156 women aged 30-60 Intermittent fasting modifies ageing-linked molecular features in an age-opposing direction Cross-tissue epigenetic biomarker mapping links immunity, metabolism, and microbiome Tissue-specific epigenetic plasticity maps reveal candidate meQTLs, Data sharing and interactive portal enable broad reuse for hypothesis generation and exploration