Faculty Bibliography

The intraclass correlation coefficient (ICC) is a classical index of measurement reliability. With the advent of new and complex types of data for which the ICC is not defined, there is a need for new ways to assess reliability. To meet this need, we propose a new distance-based ICC (dbICC), defined in terms of arbitrary distances among observations. We introduce a bias correction to improve the coverage of bootstrap confidence intervals for the dbICC, and demonstrate its efficacy via simulation. We illustrate the proposed method by analyzing the test-retest reliability of brain connectivity matrices derived from a set of repeated functional magnetic resonance imaging scans. The Spearman-Brown formula, which shows how more intensive measurement increases reliability, is extended to encompass the dbICC.

We assessed the geographic variation in socio-demographics, mobility, and built environmental factors in relation to COVID-19 testing, case, and death rates in New York City (NYC). COVID-19 rates (as of June 10, 2020), relevant socio-demographic information, and built environment characteristics were aggregated by ZIP Code Tabulation Area (ZCTA). Spatially adjusted multivariable regression models were fitted to account for spatial autocorrelation. The results show that different sets of neighborhood characteristics were independently associated with COVID-19 testing, case, and death rates. For example, the proportions of Blacks and Hispanics in a ZCTA were positively associated with COVID-19 case rate. Contrary to the conventional hypothesis, neighborhoods with low-density housing experienced higher COVID-19 case rates. In addition, demographic changes (e.g. out-migration) during the pandemic may bias the estimates of COVID-19 rates. Future research should further investigate these neighborhood-level factors and their interactions over time to better understand the mechanisms by which they affect COVID-19.

BACKGROUND:Little is known about long-term recovery from severe COVID-19 disease. Here, we characterize overall health, physical health, and mental health of patients 1 month after discharge for severe COVID-19. METHODS:This was a prospective single health system observational cohort study of patients ≥ 18 years hospitalized with laboratory-confirmed COVID-19 disease who required at least 6 l of oxygen during admission, had intact baseline cognitive and functional status, and were discharged alive. Participants were enrolled between 30 and 40 days after discharge. Outcomes were elicited through validated survey instruments: the PROMIS® Dyspnea Characteristics and PROMIS® Global Health-10. RESULTS:A total of 161 patients (40.6% of eligible) were enrolled; 152 (38.3%) completed the survey. Median age was 62 years (interquartile range [IQR], 50-67); 57 (37%) were female. Overall, 113/152 (74%) participants reported shortness of breath within the prior week (median score 3 out of 10 [IQR 0-5]), vs 47/152 (31%) pre-COVID-19 infection (0, IQR 0-1), p < 0.001. Participants also rated their physical health and mental health as worse in their post-COVID state (43.8, standard deviation 9.3; mental health 47.3, SD 9.3) compared to their pre-COVID state, (54.3, SD 9.3; 54.3, SD 7.8, respectively), both p < 0.001. Physical and mental health means in the general US population are 50 (SD 10). A total of 52/148 (35.1%) patients without pre-COVID oxygen requirements needed home oxygen after hospital discharge; 20/148 (13.5%) reported still using oxygen at time of survey. CONCLUSIONS:Patients with severe COVID-19 disease typically experience sequelae affecting their respiratory status, physical health, and mental health for at least several weeks after hospital discharge.

Efforts to control the current coronavirus disease 2019 (COVID-19) pandemic have led to national lockdowns around the world. Reactions to the rapidly evolving outbreak were shared on social media platforms. We conducted a mixed-methods analysis of tweets collected from May 10 to May 24, 2020, using MAXQDA software in conjunction with Twitters search API using the keywords: "COVID-19," "coronavirus pandemic," "Covid19," "face masks," and included terms such as "Queens," "Bronx," "New York." A total of 7, 301 COVID-19-related tweets across the globe were analyzed. We used SAS Text Miner V.15.1 for descriptive text mining to uncover the primary topics in unstructured textual data. Content analysis of tweets revealed six themes: surveillance, prevention, treatments, testing and cure, symptoms and transmission, fear, and financial loss. Our study also demonstrates the feasibility of using Twitter to capture real-time data to assess the public's concerns and public health needs during the COVID-19 pandemic.

RATIONALE & OBJECTIVE:Obesity has been related to risk for chronic kidney disease. However, the associations of different measures of midlife obesity with long-term kidney function trajectories and whether they differ by sex and race are unknown. STUDY DESIGN:Observational study. SETTING & PARTICIPANTS:13,496 participants from the Atherosclerosis Risk in Communities (ARIC) Study. PREDICTORS:Midlife obesity status as measured by body mass index (BMI), waist-to-hip ratio, and predicted percent fat at baseline. OUTCOMES:Estimated glomerular filtration rate (eGFR) calculated using serum creatinine level measured at 5 study visits, and incident kidney failure with replacement therapy (KFRT). ANALYTICAL APPROACH:Mixed models with random intercepts and random slopes for eGFR. Cox proportional hazards models for KFRT. RESULTS:per decade for Black women. Obesity indicators were independently associated with risk for KFRT for all sex-race groups except White men. LIMITATIONS:Loss to follow-up during 3 decades of follow-up with 5 eGFR assessments. CONCLUSIONS:Obesity status is a risk factor for future decline in kidney function and development of KFRT in Black and White women, with less consistent associations among men.

Objective Functional gastrointestinal disorders account for a large burden of disease in children. Specifically,constipation tends to comprise 25% or more of visits to Pediatric Gastroenterologists. With the publication ofthe ROME IV criteria, the recognition of functional constipation (FC) as a disease process has become morerefined, yet the pharmacotherapy and lifestyle modifications in the management of children with FC haveremained fairly static. Our aim was to conceptualize, design, and validate an evidence-based, personalizedconstipation action plan with pictograms to aid providers, parents, and patients in the management of FC inchildren. Methods We applied a stepwise approach for the validation of a pediatric Constipation Action Plan(CAP) with pictograms to manage FC. After reviewing available clinical practice guidelines and criterion, ourexpert team agreed on these key elements for inclusion: eating, play, belly pain, stool characteristics, negativesensations during defecation, and defecation accidents. In designing a tool for eventual implementation intothe patient-centered medical home model, we emphasized the concepts of transparency, translucency, and recall in judging the development of pictograms using digital survey analytics. Prior to the recall phase, adistraction test was performed using the Short assessment of health literacy-English version (SAHL-E) toassess respondent health literacy levels. The images were considered valid when: 1. The image demonstratedtransparency of at least 85% 2. The translucency score awarded to the image was >=5 3. The imagedemonstrated recall by at least 85% of the participants Readability of the CAP was assessed using thefollowing tools: Flesch Reading Ease score, Gunning Fog, Flesch-Kincaid Grade Level, The Coleman-Liau Index,The SMOG Index, Automated Readability Index, and Linsear Write Formula. Suitability of the CAP wasevaluated using a modified Suitability Assessment of Materials (SAM) instrument. Results The CAP wascompleted (Figure 1). Pictogram validation: 200 respondents (all with normal SAHL-E scores) completed thepictogram survey. All 12 pictograms demonstrated appropriate transparency, translucency and recall forinclusion in the CAP (Table 1). CAP validation: The CAP combined scores for readability were consistent with afourth grade level. 34 pediatricians responded to the SAM; the mean composite % score generated forsuitability was 90.5, consistent with superior material. Conclusion The Constipation Action Plan is a robustclinical action tool complete with validated pictograms, high readability, and high suitability for use in treatingFC in pediatric patients. The inherent flexibility of the CAP allows it to be tailored to meet the needs of anychild with functional constipation. The CAP represents the next step in the evolution of care for FC. Furtherinvestigation will confirm the CAP can increase caregiver confidence in home management, improvehealthcare related quality of life for the patient, and improve clinical outcomes

BACKGROUND:CKD is associated with sudden cardiac death and atrial fibrillation (AF). However, other types of arrhythmia and different measures of the burden of arrhythmias, such as presence and frequency, have not been well characterized in CKD. METHODS:To quantify the burden of arrhythmias across CKD severity in 2257 community-dwelling adults aged 71-94 years, we examined associations of major arrhythmias with CKD measures (eGFR and albuminuria) among individuals in the Atherosclerosis Risk in Communities study. Participants underwent 2 weeks of noninvasive, single-lead electrocardiogram monitoring. We examined types of arrhythmia burden: presence and frequency of arrhythmias and percent time in arrhythmias. RESULTS:Of major arrhythmias, there was a higher prevalence of AF and nonsustained ventricular tachycardia among those with more severe CKD, followed by long pause (>30 seconds) and atrioventricular block. Nonsustained ventricular tachycardia was the most frequent major arrhythmia (with 4.2 episodes per person-month). Most participants had ventricular ectopy, supraventricular tachycardia, and supraventricular ectopy. Albuminuria consistently associated with higher AF prevalence and percent time in AF, and higher prevalence of nonsustained ventricular tachycardia. When other types of arrhythmic burden were examined, lower eGFR was associated with a lower frequency of atrioventricular block. Although CKD measures were not strongly associated with minor arrhythmias, higher albuminuria was associated with a higher frequency of ventricular ectopy. CONCLUSIONS:CKD, especially as measured by albuminuria, is associated with a higher burden of AF and nonsustained ventricular tachycardia. Additionally, eGFR is associated with less frequent atrioventricular block, whereas albuminuria is associated with more frequent ventricular ectopy. Use of a novel, 2-week monitoring approach demonstrated a broader range of arrhythmias associated with CKD than previously reported.

The 2021 Kidney Disease: Improving Global Outcomes (KDIGO) Clinical Practice Guideline for the Management of Blood Pressure in Chronic Kidney Disease (CKD) recommends a target systolic blood pressure under 120 mmHg based on standardized office blood pressure measurement. Here, we examined the potential implications of this new guideline for blood pressure lowering with antihypertensive medication among adults in the United States with CKD compared to the 2012 KDIGO guideline (target blood pressure 130/80 mmHg or under with albuminuria or 140/90 mmHg or under without albuminuria) and the 2017 American College of Cardiology/American Heart Association (target blood pressure under 130/80 mmHg) guideline. Additionally, we determined implications of the 2021 KDIGO guideline for angiotensin converting enzyme inhibitor (ACEi) or angiotensin II-receptor blocker (ARB) use for those with albuminuria (recommended at systolic blood pressure of 120 mmHg or over) compared to the 2012 KDIGO guideline (recommended at blood pressures over 130/80 mmHg). Data were analyzed from 1,699 adults with CKD (estimated glomerular filtration rate 15-59 ml/min/1.73m² or a urinary albumin-to-creatinine ratio of 30 mg/g or more) in the 2015-2018 National Health and Nutrition Examination Survey and averaged up to three standardized blood pressure measurements. Among adults with CKD, 69.5% were eligible for blood pressure lowering according to the 2021 KDIGO guideline, compared with 49.8% as per 2012 KDIGO or 55.6% as per 2017 American College of Cardiology/American Heart Association guidelines. Among those with albuminuria, 78.2% were eligible for ACEi/ARB use by the 2021 KDIGO guideline compared with 71.0% by the 2012 KDIGO guideline. However, only 39.1% were taking an ACEi/ARB. Thus, our findings highlight opportunities to improve blood pressure management and reduce cardiovascular risk among adults in the United States with CKD.