To examine effect modification between genetic susceptibility to age-related macular degeneration (AMD) and dietary antioxidant or fish consumption on AMD risk.
Pooled data analysis of ...population-based cohorts.
Participants from the Blue Mountains Eye Study (BMES) and Rotterdam Study (RS).
Dietary intakes of antioxidants (lutein/zeaxanthin LZ, β-carotene, and vitamin C), long-chain omega-3 polyunsaturated fatty acids, and zinc were estimated from food frequency questionnaires. The AMD genetic risk was classified according to the number of risk alleles of CFH (rs1061170) or ARMS2 (rs10490924) as low (no or 1 risk allele) or high (≥ 2 risk alleles). Interactions between dietary intake and genetic risk levels were assessed. Associations between dietary intake and AMD risk were assessed comparing the highest with the 2 lower intake tertiles by genetic risk subgroups using discrete logistic regression, conducted in each study separately and then using pooled data. Participants without AMD lesions at any visit were controls. We adjusted for age and sex in analyses of each cohort sample and for smoking status and study site in pooled-data analyses.
All 15-year incident late AMD cases were confirmed by chief investigators of the Beaver Dam Eye Study, BMES, and RS. Intergrader reproducibility was assessed in an early AMD subsample, with 86.4% agreement between BMES and RS graders, allowing for a 1-step difference on a 5-step AMD severity scale.
In pooled data analyses, we found significant interaction between AMD genetic risk status and LZ intake (P=0.0009) but nonsignificant interactions between genetic risk status and weekly fish consumption (P=0.05) for risk of any AMD. Among participants with high genetic risk, the highest intake tertile of LZ was associated with a >20% reduced risk of early AMD, and weekly consumption of fish was associated with a 40% reduced risk of late AMD. No similar association was evident among participants with low genetic risk. No interaction was detected between β-carotene or vitamin C and genetic risk status.
Protection against AMD from greater LZ and fish consumption in persons with high genetic risk based on 2 major AMD genes raises the possibility of personalized preventive interventions.
Myopia is a common complex condition influenced by genetic and environmental factors. Two recent genome-wide association studies have identified loci on chromosomes 15q25 and 15q14 associated with ...refractive error in Caucasian populations. Our study aimed to assess the association of these 2 loci with refractive error and ocular biometric measures in an independent ethnically matched Caucasian cohort.
Genetic association study using unrelated individuals.
Blue Mountains Eye Study (BMES) cohort. A total of 1571 individuals were included in this study.
Single nucleotide polymorphism (SNP) genotype data were collected from the BMES cohort as part of the Wellcome Trust Case Control Consortium 2. Imputation was performed using MACH version 1.1.16, and statistical analysis was conducted using PLINK. Association tests were performed at both loci using refractive error (spherical equivalent), axial length, corneal curvature, and anterior chamber depth as the phenotypes.
Refractive error, axial length, corneal curvature, and anterior chamber depth.
A total of 1571 individuals were available from the BMES for analysis. A statistically significant association for refractive error was evident for SNPs at the 15q14 locus, with P values ranging from 1.5 × 10(-2) at rs685352 to 6.4 × 10(-4) at rs560764, whereas association could not be confirmed for SNPs at the 15q25 locus, with P values ranging from 8.0 × 10(-1) to 6.4 × 10(-1). Ocular biometric analysis revealed that axial length was the most likely trait underlying the refractive error association at the 15q14 locus for SNPs rs560766 (P=0.0054), rs634990 (P=0.0086), and rs8032019 (P=0.0081).
Our results confirm the association with refractive error at the 15q14 locus but do not support the association observed at the 15q25 locus. Axial length seemed to be a major parameter at the 15q14 locus, underscoring the importance of this locus in myopia and future clinical treatment.
Abstract Objective We have previously used a 12-lead, signal-processed ECG to calculate blood potassium levels. We now assess the feasibility of doing so with a smartphone-enabled single lead, to ...permit remote monitoring. Patients and methods Twenty-one hemodialysis patients held a smartphone equipped with inexpensive FDA-approved electrodes for three 2 min intervals during hemodialysis. Individualized potassium estimation models were generated for each patient. ECG-calculated potassium values were compared to blood potassium results at subsequent visits to evaluate the accuracy of the potassium estimation models. Results The mean absolute error between the estimated potassium and blood potassium 0.38 ± 0.32 mEq/L (9% of average potassium level) decreasing to 0.6 mEq/L using predictors of poor signal. Conclusions A single-lead ECG acquired using electrodes attached to a smartphone device can be processed to calculate the serum potassium with an error of 9% in patients undergoing hemodialysis. Summary A single-lead ECG acquired using electrodes attached to a smartphone can be processed to calculate the serum potassium in patients undergoing hemodialysis remotely.
Abstract Introduction In 2013, our institution established a multidisciplinary pediatric neurovascular conference for coordination of care. Here, we review our initial experience. Methods Clinical ...and demographic data were obtained from medical records for patients presented to the pediatric neurovascular conference from April 2013 to July 2014. Patient descriptive characteristics were described by mean and standard deviation for continuous measures and by number and percent for categorical measures. Patients were secondarily stratified by lesion/disease type, and descriptive statistics were used to measure demographic and clinical variables. Results The pediatric neurovascular conference met 26 times in the study period. Overall, 75 children were presented to the conference over a 15-month period. The mean age was 9.8 (standard deviation, 6.3) years. There were 42 (56%) male patients. These 75 children were presented a total of 112 times. There were 28 (37%) patients with history of stroke. Complex vascular lesions were the most frequently discussed entity; of 62 children (83%) with a diagnosed vascular lesion, brain arteriovenous malformation (29%), cavernous malformation (15%), and moyamoya (11%) were most common. Most discussions were for review of imaging (35%), treatment plan formulation (27%), the need for additional imaging (25%), or diagnosis (13%). Standardized care protocols for arteriovenous malformation and moyamoya were developed. Conclusion A multidisciplinary conference among a diverse group of providers guides complex care decisions, helps standardize care protocols, promotes provider collaboration, and supports continuity of care in pediatric neurovascular disease.
Trajectories of Psychological Distress After Stroke White, Jennifer H., MMS; Magin, Parker, PhD, FRACGP; Attia, John, MD, PhD ...
Annals of family medicine,
09/2012, Letnik:
10, Številka:
5
Journal Article
Recenzirano
Odprti dostop
Abstract Purpose There has been little exploration of the distinct trajectories of psychological distress after stroke and the factors that predict recovery from distress. These trajectories may ...assist primary care physicians by providing insight into disease onset, progression, and resolution and may be a useful way to conceptualize and understand the pattern of psychological morbidity in stroke over time. We undertook a longitudinal qualitative study to explore poststroke psychological trajectories. Methods The primary data collection method was semistructured interviews with community-dwelling stroke survivors in metropolitan Newcastle, New South Wales, Australia. Our sample included 23 participants (12 men, 10 women; age range 37 to 94 years) discharged from a tertiary referral hospital after a stroke; these participants subsequently participated in a total of 106 interviews over 12 months. Qualitative outcomes were participants' perceptions at baseline, 3, 6, 9, and 12 months. Thematic saturation was achieved. Results Most participants were male (54%) and had a partial anterior circulation infarction stroke subtype (57%). Four different longitudinal trajectories were identified: resilience (n = 5); ongoing crisis (n = 5), emergent mood disturbance (n = 3), and recovery from mood disturbance (n = 10). Recovery from mood disturbance was facilitated by gains in independence and self-esteem and by having an internal health locus of control. Conclusions Stroke survivors experienced a variety of psychological trajectories. Identifying distinct trajectories of psychological morbidity may help primary care physicians develop appropriately timed interventions to promote better mental health. Interventions require implementation over a longer duration than the current outpatient services that, in Australia, are typically provided in the first few months after stroke.
Background Cryoballoon ablation is a recently introduced technique to isolate the pulmonary veins in patients with atrial fibrillation (AF). It can potentially reduce procedural times and serious ...complications associated with radiofrequency ablation. Method We present data for 200 consecutive patients who underwent cryoballoon ablation for symptomatic AF with a mean follow-up of 16 months. Results Over 214 procedures that involved cryoballoon technique the mean procedure and fluoroscopy times fell to 130 and 30 min, respectively. 93.6% of pulmonary veins targeted were isolated with the cryoballoon only and 97.7% could be isolated with the addition of a radiofrequency ablation catheter. At one year 70% of patients in the paroxysmal AF group and 59% of patients in the persistent AF group were free from symptomatic recurrence. Three percent of patients experienced phrenic nerve palsy that persisted beyond the procedure. The major complication rate in this study was 0.9%. Conclusion This represents the earliest and largest experience with cryoballoon ablation for AF in Australia. The major complication rate was low with no pulmonary vein stenosis, atrio-oesophageal fistula, stroke or cardiac tamponade in this series. The majority of patients were free from symptomatic recurrence at two years follow up.
To investigate whether the 4G/5G polymorphism of plasminogen activator inhibitor type 1 (PAI-1) and the −7351 C/T polymorphism of tissue-type plasminogen activator (t-PA) are associated with ischemic ...stroke, we conducted a case-control study of 190 hospital cases of first-ever ischemic stroke and 185 community-based controls. Our findings do not indicate any association between the PAI-1 or t-PA polymorphisms and risk of stroke. Adding our PAI-1 results to previous studies in a meta-analysis indicated a strong association between this polymorphism and ischemic stroke ( P = .0002), with no publication bias but with extreme heterogeneity. There was evidence of stroke association with the PAI-1 4G/5G locus. Strong heterogeneity indicates the need to address other issues, including association with particular stroke subtypes or linkage disequilibrium (LD) with another causative allele. The results also sound a cautionary note that varying LD structure across populations may obscure the relationship with a causative locus, and that future meta-analyses need to look beyond a simple pooled estimate.
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