Faculty Bibliography

OBJECTIVE: To explore the association of sleep duration and awakening frequency with cognitive outcomes in young children. METHODS: Mothers of 2,800 children from the Generation R cohort reported sleep duration and awakenings at children's age 24 months. At age 6 years, validated Dutch measures were used to assess children's nonverbal intelligence and language comprehension. RESULTS: We found a nonlinear association of total sleep time at 24 months with nonverbal intelligence (p = 0.03) and language comprehension (p = 0.04) at 6 years. Toddlers sleeping within the recommended 11-14 hr had more favorable cognitive development compared with both extremes. Frequent awakenings were negatively associated with nonverbal intelligence, but not with verbal comprehension. CONCLUSION: Sleep duration in toddlerhood has an inverted-U-shaped relation with childhood cognitive measures. Frequent awakenings are associated with lower nonverbal intelligence. Given the marked decline in sleep duration and awakenings in toddlerhood, developmental changes of sleep patterns might be important for cognitive development.

BACKGROUND: There is a need for a rapid substance use screening instrument to detect unhealthy tobacco, alcohol, and other drug use among primary care patients. The Tobacco, Alcohol, Prescription Medications, and other Substances Tool (TAPS Tool) is a combined 2-part screening and brief assessment developed for adult primary care patients. Its screening component (TAPS-1) consists of 4 items asking about past 12-month use of four substance categories (any tobacco, 5 or more drinks/day for men [4 for women] of alcohol, any illicit drug use, and any non-medical use of prescription drugs. Categorical response options are: never, less than monthly, monthly, weekly, and daily or almost daily. The objective of this preplanned secondary analysis was to validate the TAPS-1 against the DSM-5 substance use disorder (SUD) criteria. METHODS: This was a multi-site study evaluating the concurrent validity of the TAPS-1 compared to SUD criteria conducted among 2,000 adult primary care patients in 5 clinics located in 4 Eastern US states. Participants completed the TAPS Tool in a self- administered version on a tablet computer and in an interviewer-administered format, in random order. They were then administered a modified version of the Composite International Diagnostic Interview (CIDI) to determine DSM-5 criteria. Optimal cut points for identifying SUDs were obtained using receiver operating characteristics (ROC) analysis to obtain sensitivity (sens), specificity (spec), positive predictive value (PPV), negative predictive value (NPV), and area under the curve (AUC). RESULTS: The optimal cut-point on the interviewer-administered TAPS-1 for identifying SUDs was '> monthly use' for tobacco (sens = .95, spec = .80, PPV= .62, NPV = .98, AUC = .88) and for alcohol (sens = .68, spec = .87, PPV = .45, NPV = .94, AUC = .77). In contrast, 'any use' was the optimal cut-point for illicit drugs (sens = .93, spec = .86, PPV = .50, NPV = .99, AUC = .89) and for nonmedical use of prescription drugs (sens = .90, spec = .95, PPV = .41, NPV = 1.0, AUC= .93). The self-administered format had similar performance. CONCLUSIONS: The TAPS-1 was able to rapidly screen adult primary care patients for SUDs. Thus, the TAPS-1 could assist health care providers in determining which patients might need a focused, in-depth substance use assessment

Objective: To describe a case of gaze-position dependent opsoclonus and discuss potential localization. Background: Opsoclonus is characterized by bursts of involuntary, back-to-back saccades without an intersaccadic interval at frequency of 10-25 Hz in horizontal, vertical, and torsional planes. Opsoclonus with gaze-directional selectivity has been rarely described. Design/Methods: We report a 50 year-old man who sustained a concussion three years prior followed by postconcussive headaches and disequilibrium. Exam revealed very small amplitude oscillations in left gaze that could not be further characterized on clinical exam. Different larger amplitude horizontal oscillations were present with convergence. There were no other posterior fossa signs. Brain MRI was unremarkable. Results: Video-oculography demonstrated opsoclonus predominantly in left gaze [median amplitude 5 deg (range <1- 11 deg), frequency 30 Hz] and during leftward smooth pursuit, which improved [median amplitude 2 deg (range < 1-10 deg), frequency 10 Hz] as post-concussive symptoms improved. Conclusions: This case demonstrates opsoclonus with eye position selectivity in post-concussive syndrome. Various theories of opsoclonus exist, including lesions of saccade burst, omnipause, or cerebellar fastigial pause neurons which project to brainstem burst neurons. Ultimately, all of these lead to increased excitability in the inherently unstable saccade generators. Burst and omnipause neuron firing rates are not influenced by eye position. The leftward gaze-dependence in our case supports dysfunction of cerebellar dorsal vermis Purkinje cells leading to disinhibition of the fastigial ocular motor nucleus, as vermal pause neurons have gaze-directional selectivity. Vermal pause neurons exhibit a pause of discharge immediately before and during contralateral saccades. Thus, selective dysfunction, possibly related to concussion-related membrane instability, could create an imbalance in burst neuron excitability, resulting in triggering of unidirectional opsoclonus. Further, our patient's saccade system may be inherently prone to oscillations given the presence of larger amplitude horizontal oscillations consistent with 'voluntary flutter', which persisted when leftward opsoclonus improved

BACKGROUND: The Substance Abuse Research and Education Training (SARET) program is funded by the National Institutes of Drug Abuse in 2006 as a novel approach to spark interest in substance abuse research among medical, dental, nursing, and social work graduate students through a Web-based curriculum and research mentorships. This report presents the initial integration of the intervention in a Master of Social Work (MSW) program, the components of the program, and the mixed-methods evaluation of its effect on students' attitudes towards substance abuse research and treatment. METHODS: SARET comprises 2 main components: stipend-supported research mentorships and a Web-based module series, consisting of 6 interactive, multimedia modules addressing core SA research topics, delivered via course curricula and in the research mentorships. An initial evaluation was designed to assess SARET's acceptability and short-term impact on participants' interest in SA research. The components of this Web-based curriculum evaluation include focus group feedback on the relevance of the modules to SW students, number of courses into which the modules were integrated with number of module completions, changes in interest in SA research associated with module completion. RESULTS: The full series of Web-based modules has been integrated across several courses in the social work curriculum, and social work students have become integral participants in the summer mentored research experience. One hundred eighteen students completed at least 1 module and 42 students completed all 6 modules. Neurobiology, Screening, and Epidemiology were the most widely viewed modules. Students reported positive impact on their vision of SA-related clinical care, more positive attitudes about conducting research, and in some cases, change in career. CONCLUSIONS: The SARET program's modules and summer mentored research increased clinical and research interest related to SUDs, as well as interprofessional attitudes among social work students. Participants have shown some early research success. Longer-term follow-up will enable us to continue to assess the effectiveness of the program.

BACKGROUND: Food insecurity (FI) occurs when individuals or households have limited or uncertain access to adequate food. People with FI may find it particularly difficult to eat a balanced diet and manage weight. Individuals who report FI are 1.4 times more likely to have obesity. U.S. Veterans have a greater prevalence of FI compared with the general population (24% vs. 19%). As part of a pilot randomized controlled trial to test the impact of an obesity intervention for Veterans, we explored the prevalence of FI in our sample and assessed the impact of FI on weight outcomes. METHODS: Veterans with a Body Mass Index of greater than or equal to 30 or between 25 and 29.99 with at least one comorbidity were recruited by phone for a pilot study. Participants randomized to the intervention received a technology-assisted health coaching session and follow-up coaching calls; control participants received a VA "healthy living messages" pamphlet. At baseline and 3 months, participants had weight measurements and completed surveys. To measure FI, we used a 6-item Household Food Security Scale (FI = 2 or more affirmative responses). We assessed the impact of FI on variables independent of arm assignment in participants who returned for a 3-month measurement visit (Wilcoxon rank sum tests and Fisher's Exact Test). We also analyzed the role of FI as a moderator between arm and study variables using ANOVA. RESULTS: Out of 31 Veterans who enrolled in the study (Mean age = 53.48, 63% male, mean BMI = 31.72), 10 demonstrated FI at baseline and 25 participants completed 3 month measurements. Independent of the intervention, those with FI (n = 10) lost .01 kg of weight and those without FI (n = 15) lost 1.69 kg at 3-months but the difference was not significant (p = 0.2). Similarly, 0/10 Veterans with FI achieved 2.5% weight loss, compared to 4/15 of those without FI (p = 0.12). Those with FI in the control group gained weight when compared to those without FI (1.04 kg, SD = 1.41 vs. -1.75, SD = 3.96) and those with FI in the intervention lost the same amount of weight as those without FI (-1.59 kg, SD = 0.83, vs. -1.59, SD = 2.27; p = 0.24 for the interaction (not significant)). CONCLUSIONS: FI in Veterans enrolled in a weight management study is high. Participants with FI in the control arm may have gained weight when compared to non-FI participants, while intervention arm participants with FI lost similar amounts of weight to those without FI. This suggests that the intervention may reduce the negative impact of FI. While this pilot study was not powered to show a significant difference, we have amended health coaching protocols to better address FI in our intervention (e.g. screening for FI and linking participants with Supplemental Nutrition Assistance Program (SNAP) benefits and similar resources) hoping to maximize its effectiveness

Geriatric syndromes are common in hospitalized elders with heart failure (HF), but association with clinical outcomes is not well characterized. The purpose of this study (N = 289) was to assess presence of geriatric syndromes using Joint Commission-mandated measures, the Braden Scale (BS) and Morse Fall Scale (MFS), and to explore prognostic utility in hospitalized HF patients. Data extracted from the electronic medical record included sociodemographics, medications, clinical data, comorbid conditions, and the BS and MFS. The primary outcome of mortality was assessed using Social Security Death Master File. Statistical analysis included Cox proportional hazards models to assess association between BS and MFS scores and all-cause mortality with adjustment for known clinical prognostic factors. Higher risk BS and MFS scores were common in hospitalized HF patients, but were not independent predictors of survival. Further study of the clinical utility of these scores and other measures of geriatric syndromes in HF is warranted.

OBJECTIVE: We examined whether the negative relation between television viewing that exceeds the recommendations of the American Academy of Pediatrics (AAP) and school readiness varied by family income. METHODS: Data were collected from 807 children from diverse backgrounds. Parents reported hours of television viewing, as well as family income. Children were assessed using measures of math, knowledge of letters and words, and executive function (EF). RESULTS: Television viewing was negatively associated with math and EF but not with letter and word knowledge. An interaction between television viewing and family income indicated that the effect of television viewing in excess of the AAP recommended maximum had negative associations with math and EF that increased as a linear function of family income. Furthermore, EF partially mediated the relation between television viewing and math. CONCLUSION: Television viewing is negatively associated with children's school readiness skills, and this association increased as family income decreased. Active efforts to reinforce AAP guidelines to limit the amount of television children watch should be made, especially for children from middle- to lower-income families.

Background Metabolic syndrome (MetS) is associated with increased risk for cardiovascular disease, but there is heterogeneity in this risk. We evaluated whether high-sensitivity troponin T (hs-cTnT), a marker associated with cardiovascular disease, can stratify risk in MetS. Methods We evaluated associations between MetS (and groups with similar number of MetS components) and incident heart failure hospitalization, coronary heart disease, stroke and death using hs-cTnT categories after adjusting for risk factors/markers between 1996 and 2011 in 8204 individuals in the Atherosclerosis Risk In Communities study. Results The mean age of the population was 63 years (56% women, 19% Blacks). hs-cTnT levels were higher with MetS and with increasing MetS components. In individuals with MetS, higher hs-cTnT levels were associated with increased hazard ratios for heart failure, coronary heart disease and death. Within each number of MetS components, higher hs-cTnT was associated with progressively higher heart failure, coronary heart disease and death hazards. The association was particularly strong for heart failure. With increasing hs-cTnT categories, the hazard ratios (95% confidence interval) for heart failure in individuals with MetS increased gradually from 1.68 (1.31-2.16) to 3.76 (2.69-5.26) ( p-trend < 0.001) compared with those with MetS and hs-cTnT < 5 ng/l; and respective hazard ratios with increasing hs-cTnT categories in those with all five MetS components ranged from 2.22 (1.17-4.21) to 4.23 (1.89-9.50) ( p-trend 0.004) compared with those with all five MetS components and hs-cTnT < 5 ng/l. However, mostly there were no significant interactions of hs-cTnT with MetS or its components. Conclusion hs-cTnT is useful for identifying MetS patients with increased hazards for coronary heart disease, death and particularly heart failure.

BACKGROUND:Local ancestry may contribute to the disproportionate burden of subclinical and clinical cardiovascular disease among admixed African Americans compared with other populations, suggesting a rationale for admixture mapping. METHODS AND RESULTS/RESULTS:gene (lipoma high mobility group protein I-C fusion partner-like 2) with hard and all coronary heart disease. CONCLUSIONS:We identified several novel LEA regions, in addition to previously identified genetic variations, associated with cCIMT and cardiovascular disease events among African Americans.

OBJECTIVE: To measure variation in payment rates under Medicare's Inpatient Prospective Payment System (IPPS) and identify the main payment adjustments that drive variation. DATA SOURCES/STUDY SETTING: Medicare cost reports for all Medicare-certified hospitals, 1987-2013, and Dartmouth Atlas geographic files. STUDY DESIGN: We measure the Medicare payment rate as a hospital's total acute inpatient Medicare Part A payment, divided by the standard IPPS payment for its geographic area. We assess variation using several measures, both within local markets and nationally. We perform a factor decomposition to identify the share of variation attributable to specific adjustments. We also describe the characteristics of hospitals receiving different payment rates and evaluate changes in the magnitude of the main adjustments over time. DATA COLLECTION/EXTRACTION METHODS: Data downloaded from the Centers for Medicare and Medicaid Services, the National Bureau of Economic Research, and the Dartmouth Atlas. PRINCIPAL FINDINGS: In 2013, Medicare paid for acute inpatient discharges at a rate 31 percent above the IPPS base. For the top 10 percent of discharges, the mean rate was double the IPPS base. Variations were driven by adjustments for medical education and care to low-income populations. The magnitude of variation has increased over time. CONCLUSIONS: Adjustments are a large and growing share of Medicare hospital payments, and they create significant variation in payment rates.