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Baseline patterns of adipose tissue fatty acids and long-term risk of breast cancer: a case-cohort study in the Danish cohort Diet, Cancer and Health.

https://arctichealth.org/en/permalink/ahliterature264936
Source
Eur J Clin Nutr. 2014 Oct;68(10):1088-94
Publication Type
Article
Date
Oct-2014
Author
J A Schmidt
A. Gorst-Rasmussen
P W Nyström
J H Christensen
E B Schmidt
C. Dethlefsen
A. Tjønneland
K. Overvad
C C Dahm
Source
Eur J Clin Nutr. 2014 Oct;68(10):1088-94
Date
Oct-2014
Language
English
Publication Type
Article
Keywords
Adult
Aged
Breast Neoplasms - epidemiology - pathology
Cohort Studies
Denmark - epidemiology
Fatty Acids - analysis
Female
Humans
Incidence
Male
Middle Aged
Prospective Studies
Risk
Risk factors
Subcutaneous Fat - chemistry
Abstract
The evidence regarding fatty acids and breast cancer risk is inconclusive. Adipose tissue fatty acids can be used as biomarkers of fatty acid intake and of endogenous fatty acid exposure. Fatty acids in adipose tissue are correlated owing to common dietary sources and shared metabolic pathways, which group fatty acids into naturally occurring patterns. We aimed to prospectively investigate associations between adipose tissue fatty acid patterns and long-term risk of total breast cancer and breast cancer subtypes characterised by oestrogen and progesterone receptor status (ER and PR).
This case-cohort study was based on data from the Danish cohort Diet, Cancer and Health. At baseline, a fat biopsy and information on lifestyle and reproductive factors were collected. From the 31 original fatty acids measured, patterns of fatty acids were identified using the treelet transform. During a median follow-up of 5.3 years, 474 breast cancer cases were identified. Hazard ratios and 95% confidence intervals of risk of total breast cancer and of subtypes according to quintiles of factor score were determined by weighted Cox proportional hazards regression.
After adjustment for potential confounders, factor scores for the seven patterns identified by the treelet transform were not associated with risk of total breast cancer, nor with risk of ER+, ER-, PR+ or PR- tumours.
No clear associations between the patterns of fatty acids at baseline and long-term risk of total breast cancer or ER+, ER-, PR+ or PR- tumours were observed.
PubMed ID
24642780 View in PubMed
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Body composition and body fat distribution in relation to later risk of acute myocardial infarction: a Danish follow-up study.

https://arctichealth.org/en/permalink/ahliterature137399
Source
Int J Obes (Lond). 2011 Nov;35(11):1433-41
Publication Type
Article
Date
Nov-2011
Author
J G Stegger
E B Schmidt
T. Obel
T L Berentzen
A. Tjønneland
T I A Sørensen
K. Overvad
Author Affiliation
Department of Cardiology, Center for Cardiovascular Research, Aalborg Hospital, Aarhus University Hospital, Aalborg, Denmark. Jakob.Stegger@rn.dk
Source
Int J Obes (Lond). 2011 Nov;35(11):1433-41
Date
Nov-2011
Language
English
Publication Type
Article
Keywords
Body Composition
Body Fat Distribution
Body mass index
Denmark - epidemiology
Female
Follow-Up Studies
Humans
Male
Middle Aged
Myocardial Infarction - epidemiology - etiology - physiopathology
Obesity - complications - epidemiology - physiopathology
Predictive value of tests
Proportional Hazards Models
Prospective Studies
Questionnaires
Risk factors
Abstract
Obesity is a modifiable risk factor for acute myocardial infarction (MI), but lean body mass (LBM) may also be an important factor. Low LBM may increase the risk of MI and LBM may modify the effect of obesity on MI. Thus, the inability of the classical anthropometric measures to evaluate LBM may lead to misclassification of MI risk in both lean and obese persons. We investigated the associations between incident MI and bioelectrical impedance analyses (BIA) derived measures of body composition in combination with body mass index (BMI) and anthropometric measures of body fat distribution.
From 1993 to 1997, 27?148 men and 29?863 women, aged 50 to 64 year, were recruited into the Danish prospective study Diet, Cancer and Health. During 11.9 years of follow-up we identified 2028 cases of incident MI (1487 men and 541 women). BMI, waist circumference (WC), hip circumference and BIA of body composition including body fat mass (BFM), body fat percentage and LBM were measured at baseline. We used Cox proportional hazard models with age as time axis and performed extensive control for confounding. Weight, BMI, classical estimates of abdominal obesity and BIA estimates of obesity showed significant positive associations with incident MI. However, BFM adjusted for WC showed no association. Low LBM was associated with a higher risk of incident MI in both genders, and high LBM was associated with a higher risk in men.
Obesity was positively associated with MI. Estimates of obesity achieved by BIA seemed not to add additional information to classical anthropometric measures regarding MI risk. Both high and low LBM may be positively associated with MI.
PubMed ID
21285940 View in PubMed
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Validity of Peripheral Arterial Disease Diagnoses in the Danish National Patient Registry.

https://arctichealth.org/en/permalink/ahliterature288292
Source
Eur J Vasc Endovasc Surg. 2017 May;53(5):679-685
Publication Type
Article
Date
May-2017
Author
A N Lasota
K. Overvad
H H Eriksen
A. Tjønneland
E B Schmidt
M-L M Grønholdt
Source
Eur J Vasc Endovasc Surg. 2017 May;53(5):679-685
Date
May-2017
Language
English
Publication Type
Article
Keywords
Aged
Denmark - epidemiology
Female
Humans
Male
Middle Aged
Peripheral Arterial Disease - diagnosis - epidemiology
Predictive value of tests
Registries
Reproducibility of Results
Abstract
The objective was to validate the diagnoses of peripheral arterial disease (PAD) in the legs, obtained from national registers in Denmark.
In total, 1435 registered cases of PAD were identified in the Danish National Patient Registry among 57,053 middle aged participants from the Danish Diet, Cancer and Health cohort study. Validation was performed by reviewing all medical records using pre-specified criteria for a diagnosis of PAD.
The overall positive predictive value (PPV) of PAD diagnoses was 69.4% [95% confidence interval (CI) 67.0-71.7]. The PPV of diagnoses given in departments of vascular surgery was significantly higher than diagnoses given in other departments: 71.9% (95% CI 69.2-74.4) versus 58.3% (95% CI 52.2-64.2), respectively. In a sub-study, 141 potential cases of PAD also registered in the Danish National Vascular Registry were evaluated, and a PPV of 87.9% (95% CI 81.4-92.4) was found for these diagnoses.
More than 30% of the diagnoses of PAD notified in the Danish National Patient Registry were not valid, stressing the importance of validation when using register information for research purposes. In contrast, diagnoses obtained from the Danish National Vascular Registry had a high validity ready for use without further validation.
Notes
Comment In: Eur J Vasc Endovasc Surg. 2017 May;53(5):611-61228400093
PubMed ID
28187995 View in PubMed
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