Kevin J. Kane

HMG-CoA Reductase Inhibitors Improve Acute Ischemic Stroke Outcome

Background and Purpose— Statins reduce the risk of stroke recurrence, but the benefits of statins in improving outcome of acute stroke patients have not been well explored. Methods— We assessed potential effects of statins initiated before or within 4 weeks of stroke on 90-day outcome. Favorable outcomes were National Institutes of Health Stroke Scale (NIHSS) score ≤2 at 12 weeks and modified Rankin Scale (mRS) ≤2. Results— Before stroke, 129 patients were receiving statins, 123 initiated statins within 4 weeks, and 600 patients were not on statins. Multivariate logistic regression analysis demonstrated that poststroke statins were associated with a significant probability of a favorable outcome at 12 weeks [NIHSS (P=0.002; OR, 1.92; CI, 1.27 to 2.91) and mRS (P=0.033; OR, 1.57; CI, 1.04 to 2.38)], whereas prestroke statins demonstrated a trend toward significance. Conclusions— These preliminary results suggest that statin use may improve outcome of acute ischemic stroke.

Familial Alzheimer's disease: Site of mutation influences clinical phenotype

Alzheimers disease (AD) is caused by multiple genetic and/or environmental etiologies. Because differences in the genetically determined pathogenesis may cause differences in the phenotype, we examined age at onset and age at death in 90 subjects with dominantly inherited AD due to different mutations (amyloid precursor protein, presenilin‐1, and presenilin‐2 genes). We found that among patients with dominantly inherited AD, genetic factors influence both age at onset and age at death. Ann Neurol 2000;48:376–379

Long-term statin therapy and CSF cholesterol levels: implications for Alzheimer's disease.

Background/Aims: It is not yet established whether statins (lipophilic or hydrophilic) reduce the risk of Alzheimer’s disease and, if so, by differentially modifying brain lipid levels. Our aim was to assess changes in brain cholesterol metabolism as reflected in the cerebrospinal fluid (CSF) before and after treatment with either atorvastatin or simvastatin. Methods: We carried out a longitudinal analysis of CSF cholesterol, lathosterol and 24(S)-hydroxycholesterol before and after treatment with maximum doses of statins in 10 asymptomatic subjects, 8 of whom were heterozygous for apolipoprotein E ε4, and in 6 presymptomatic PS1 subjects. Results: Statins initially reduced CSF lathosterol cholesterol and 24(S)-hydroxycholesterol in both PS1 and non-PS1 subjects reaching a nadir at 6–7 months, followed by a return to baseline at 15 months with an overshoot at 2 years, tending to return to baseline thereafter. Conclusions: Possible long-term protective effects of statins are not likely largely related to the temporally-dependent biphasic effects of statin therapy upon the magnitude and direction of changes in CSF lipid levels and their subsequent return to baseline levels.

Screening for Dementia in “Real World” Settings: The Cognitive Assessment Screening Test: CAST

Among elderly people who do not present with complaints of memory impairment, dementia is often missed by physicians, and time-consuming screening tests requiring expertise to administer and interpret are rarely done. Easily administered, reliable and cost effective dementia screening tests are needed for elderly individuals. The “pencil and paper” Cognitive Assessment Screening Test (CAST) takes minimal examiner time/training, and is both sensitive and specific in discriminating demented patients from healthy controls. The objectives of this study were to: (1) confirm the validity of the CAST in identifying individuals with dementia in a real-world setting (nonassisted living retirement community); (2) compare the sensitivity and specificity with other screening tests and extensive psychometric tests; and (3) assess the reliability of the CAST in test-retest conditions over time. The CAST was both sensitive and specific and showed reliability on retesting. The CAST is both simpler to administer and more accurate than other screening tests for elderly subjects.

Access to Healthy Food Stores Modifies Effect of a Dietary Intervention

BACKGROUND Recent evidence suggests that opening a grocery store in a food desert does not translate to better diet quality among community residents. PURPOSE This study evaluated the influence of proximity to a healthy food store on the effect of a dietary behavioral intervention on diet among obese adults randomized to either a high fiber or American Heart Association diet intervention. METHODS Participants were recruited from Worcester County, Massachusetts, between June 2009 and January 2012. Dietary data were collected via 24-hour recalls at baseline and 3, 6, and 12 months post-intervention. Based on in-store inspection data, a store was considered as having adequate availability of healthy foods if it had at least one item available in each of 20 healthy food categories. Linear models evaluated maximum change in dietary outcomes in relation to road distance from residence to the nearest June healthy food store. The analysis was conducted in January to June 2014. RESULTS On average, participants (N=204) were aged 52 years, BMI=34.9, and included 72% women and 89% non-Hispanic whites. Shorter distance to a healthy food store was associated with greater improvements in consumption of fiber (b=-1.07 g/day per mile, p<0.01) and fruits and vegetables (b=-0.19 servings/day per mile, p=0.03) with and without covariate adjustment. CONCLUSIONS The effectiveness of dietary interventions is significantly influenced by the presence of a supportive community nutrition environment. Considering the nationwide efforts on promotion of healthy eating, the value of improving community access to healthy foods should not be underestimated. CLINICAL TRIAL REGISTRATION NUMBER NCT00911885.

Paroxysmal atrial fibrillation in cryptogenic stroke

Introduction: Paroxysmal atrial fibrillation (PAF) is perhaps the most underdiagnosed mechanism of apparent cryptogenic stroke (CS). Various studies have shown that increasing the duration of monitoring can increase the diagnosis of PAF in CS. Methods: We compared demographic and risk factors for ischemic stroke across different TOAST (Trial of ORG 10172 in Acute Stroke Treatment) stroke subtypes to look for clinical differences between other subtypes and CS and subsequently performed periodic Holter monitoring and imaging studies in apparent CS patients. Results: Of the 298 patients with ischemic stroke, 17% had CS. Periodic holter monitoring enabled diagnosis of PAF in 29% of patients. Five of 51 patients with CS had recurrent ischemic stroke and all 5 were demonstrated as PAF on repeated Holter monitoring. Conclusions: Long-term periodic rhythm monitoring in patients with apparent CS showed PAF in a significant percentage of CS patients, which altered subsequent treatment.

Recent Increases in Efficiency in Cigarette Nicotine Delivery: Implications for Tobacco Control

INTRODUCTION Recent increases in nicotine yield of cigarettes sold in the United States have been attributed by tobacco manufacturers to natural variation in agricultural products. We tested this assertion using data reported by the manufacturers. METHODS Data were collected from the annual reports filed with the Massachusetts Department of Public Health by 4 major manufacturers of cigarettes from 1997 to 2012. Reportable measures included nicotine yield (mg/cig) in smoke generated by a smoking machine based on the Massachusetts smoking regimen and nicotine content in the unburned tobacco per cigarette (mg/cig). We used multilevel linear mixed-effect models to examine temporal trends in and predictors of these measures, overall and by brand style and by brand family. RESULTS While nicotine content remained relatively stable in the range of 12-14 mg/cig between 1998 and 2012, average nicotine yield increased significantly (p < .01) over time and ranged from the lowest level of 1.65 mg/cigarette in 1999 to the highest level of 1.89 mg/cigarette in 2011. Nicotine yield and yield-to-content ratio varied significantly among manufacturers and brand families. When controlling for market category and all available design features, the yield-to-content ratio of all manufacturers except Lorillard increased significantly over time. CONCLUSIONS The data provided by tobacco manufacturers suggest that the increasing trend in yield is not related to variations in nicotine content but to the yield-to-content ratio, which contradicts their assertions of agricultural variations. Nicotine yield and yield-to-content ratio are controllable features of cigarettes, and they should be monitored and regulated by government agencies.

Variations in Community Prevalence and Determinants of Recreational and Utilitarian Walking in Older Age.

Background. Regular walking is critical to maintaining health in older age. We examined influences of individual and community factors on walking habits in older adults. Methods. We analyzed walking habits among participants of a prospective cohort study of 745 community-dwelling men and women, mainly aged 70 years or older. We estimated community variations in utilitarian and recreational walking, and examined whether the variations were attributable to community differences in individual and environmental factors. Results. Prevalence of recreational walking was relatively uniform while prevalence of utilitarian walking varied across the 16 communities in the study area. Both types of walking were associated with individual health and physical abilities. However, utilitarian walking was also strongly associated with several measures of neighborhood socioeconomic status and access to amenities while recreational walking was not. Conclusions. Utilitarian walking is strongly influenced by neighborhood environment, but intrinsic factors may be more important for recreational walking. Communities with the highest overall walking prevalence were those with the most utilitarian walkers. Public health promotion of regular walking should take this into account.

Has Boston's 2011 cigar packaging and pricing regulation reduced availability of single-flavoured cigars popular with youth?

Objective We evaluated retailer compliance with a cigar packaging and pricing regulation in Boston, Massachusetts, enacted in February 2012, and the regulations impact on availability of single cigars. Methods Grape-flavoured Dutch Masters (DM) single-packaged cigars were examined as market indicator. At quarterly intervals from October 2011 to December 2014, availability and price of DM single cigars were observed through professional inspector visits to tobacco retailers in Boston (n=2232) and 10 comparison cities (n=3400). Differences in price and availability were examined between Boston and the comparison cities and across Boston neighbourhoods. Results The mean price of DM single cigars sold in Boston increased from under

Disparities in access to healthy and unhealthy foods in central Massachusetts: implications for public health policy

1.50 in 2011 to above