Racial Disparities in Diagnosis and Treatment of Patients With Dermatomyositis of Different Skin Tones.

BACKGROUND: Delays in the diagnosis and treatment of dermatological conditions in minorities are a well-documented health disparity. We aimed to determine if there was a delay in detection and treatment initiation for dermatomyositis (DM) and amyopathic dermatomyositis (ADM) in patients of different skin tones. METHODS: Patients from Montefiore Medical Center who met the criteria for DM and ADM were included in this cohort study. Records were reviewed for date of first documented rash, creatine kinase levels, muscle weakness complaints, and date of first steroid or disease-modifying antirheumatic drug initiation. The median number of days between rash documentation and therapy initiation was compared for patients of different races, including non-Hispanic White, non-Hispanic Black, Hispanic, and other (Asian and unknown). Data were compared in White versus non-White skin. RESULTS: Sixty-three DM and 9 ADM patients met the inclusion criteria. There was a shorter time to treatment initiation in White versus non-White patients, with a median number of 8 days compared with 21 days, respectively ( p = 0.05). Kaplan-Meier curves showed prolonged time to diagnosis and treatment in all other races when compared with White patients ( p = 0.03). DISCUSSION: It took clinicians longer to diagnose and treat DM and ADM in patients of color. The trends observed emphasize the importance of increasing dermatology education of non-White skin to improve detection and treatment of DM and ADM and minimize health disparities.

COVID-19 and Changes in Reported Social Risk Factors at a Primary Care Practice in the South Bronx.

INTRODUCTION: Historically, Black and Hispanic patient populations in the Bronx Borough of New York City have experienced the highest rates of social risk factors, and associated poor health outcomes, in New York State. During the pandemic, Bronx communities disproportionately experienced high rates of COVID-19 illness and death. To date, little is known regarding the COVID-19 pandemic's impact on social risk factors in urban, at-risk communities. This study aimed to determine how social risk factors changed during the pandemic in a Bronx-based patient population. METHODS: Study participants were adult patients seen at a Federally Qualified Health Center in the South Bronx. Using a paired longitudinal study design, 300 participants were randomly selected for telephonic outreach during the pandemic from a sample of 865 participants who had been offered a social risk factor screener in the year prior to the pandemic. The outreach survey used included the social risk factor screener and questions regarding COVID-19 illness burden and prior engagement in social services. The McNemar test was used to analyze trends in reported social risks. RESULTS: Housing quality needs, food insecurity, and legal care needs significantly increased during the pandemic. Participants who reported COVID-19 illness burden were 1.47 times more likely to report a social risk factor (P = .02). No significant relationship was found between prior enrollment in clinic-based social services and degree of reported social risk (P = .06). CONCLUSION: Housing quality needs, food insecurity, and legal care needs increased during the COVID-19 pandemic in a predominantly Black and Hispanic identifying urban patient population. Urgently addressing this increase is imperative to achieving health equity in ongoing COVID-19 mitigation efforts.

Longitudinal assessment of abnormal Papanicolaou test rates among women with HIV.

OBJECTIVE: To describe longitudinal changes in the prevalence of abnormal Papanicolau testing among women living with HIV. DESIGN: Prospective cohort study with sequential enrollment subcohorts. METHODS: Four waves of enrollment occurred in the Women's Interagency HIV Study, the US women's HIV cohort (1994-1995, 2001-2002, 2011-2012, 2013-2015). Pap testing was done at intake, with colposcopy prescribed for any abnormality. Rates of abnormal Pap test results (atypical squamous cells of uncertain significance or worse) and cervical intraepithelial neoplasia grade 2 (CIN2) or worse were calculated. Logistic regression models assessed changes in prevalence across cohorts after controlling for severity of HIV disease and other risk factors for abnormal Pap tests. RESULTS: The unadjusted prevalence of any Pap abnormality was 679/1769 (38%) in the original cohort, 195/684 (29%) in the 2001-2002 cohort, 46/231 (20%) in the 2011-2012 cohort, and 71/449 (16%) in the 2013-2015 cohort. In multivariable analysis, compared with risk in the 1994-1995 cohort, the adjusted risk in the 2001-2002 cohort was 0.79 (95% CI 0.59-1.05), in the 2011-2012 cohort was 0.67 (95% CI 0.43-1.04), and in the 2013-2015 cohort was 0.41 (95% CI 0.27-0.62) with P for trend less than 0.0001. CONCLUSION: Rates of abnormal cytology among women with HIV have fallen during the past two decades.

Generalized linear mixed model for binary outcomes when covariates are subject to measurement errors and detection limits.

Longitudinal measurement of biomarkers is important in determining risk factors for binary endpoints such as infection or disease. However, biomarkers are subject to measurement error, and some are also subject to left-censoring due to a lower limit of detection. Statistical methods to address these issues are few. We herein propose a generalized linear mixed model and estimate the model parameters using the Monte Carlo Newton-Raphson (MCNR) method. Inferences regarding the parameters are made by applying Louis's method and the delta method. Simulation studies were conducted to compare the proposed MCNR method with existing methods including the maximum likelihood (ML) method and the ad hoc approach of replacing the left-censored values with half of the detection limit (HDL). The results showed that the performance of the MCNR method is superior to ML and HDL with respect to the empirical standard error, as well as the coverage probability for the 95% confidence interval. The HDL method uses an incorrect imputation method, and the computation is constrained by the number of quadrature points; while the ML method also suffers from the constrain for the number of quadrature points, the MCNR method does not have this limitation and approximates the likelihood function better than the other methods. The improvement of the MCNR method is further illustrated with real-world data from a longitudinal study of local cervicovaginal HIV viral load and its effects on oncogenic HPV detection in HIV-positive women.

Utilization of intraperitoneal chemotherapy for optimally cytoreduced advanced stage epithelial ovarian cancer: A 10-year single institution experience with a racially diverse urban population.

OBJECTIVES: The goal of our study was to define utilization and clinical results of intraperitoneal (IV/IP) compared to intravenous (IV) chemotherapy in a racially and ethnically diverse population with optimally debulked advanced stage epithelial ovarian cancer. METHODS: After IRB approval, all patients diagnosed with epithelial ovarian cancer that underwent primary cytoreductive surgery at our institution from 2005 to 2016 were identified. Death was verified by the National Social Security Death Index. Patients who received at least one IV/IP cycle were analyzed in the IV/IP cohort. Kaplan-Meier and Cox proportional hazards models were performed. RESULTS: 96 patients with advanced stage optimally cytoreduced epithelial ovarian cancer (median follow up 33months) were identified. 51% and 49% of patients received IV/IP and IV chemotherapy, respectively. 27%, 22%, and 39% of patients were of white, black, and other race. Compared with IV chemotherapy only, IV/IP chemotherapy was associated with longer OS (log rank <0.002) and IV/IP chemotherapy versus IV chemotherapy alone was associated with a lower risk of death (HR=0.31, 95% CI 0.16-0.62, P<0.001). The median overall survival for the IV/IP and IV groups was 76months (95% CI 62 - not estimated) and 38months (95% CI 30-55), respectively. There was a trend toward higher risk of death for patients who completed fewer than 6cycles of IV/IP chemotherapy compared to women who completed 6 IV/IP cycles (HR=3.2, 95% CI 0.98-9.27 (P=0.05). No differences in patient or tumor characteristics were identified between these two groups of patients. CONCLUSIONS: In our racially diverse urban patients, 50% of patients received IV/IP chemotherapy and it was associated with improved overall survival compared to IV chemotherapy alone. Further investigation is needed to identify barriers to use of IV/IP chemotherapy.

Development of a Model System to Evaluate Local Recurrence in Osteosarcoma and Assessment of the Effects of Bone Morphogenetic Protein-2.

PURPOSE: It is increasingly relevant to better define what constitutes an adequate surgical margin in an effort to improve reconstructive longevity and functional outcomes following osteosarcoma surgery. In addition, nonunion remains a challenging problem in some patients following allograft reconstruction. Bone morphogenetic protein-2 (BMP-2) could enhance osseous union, but has been historically avoided due to concerns that it may promote tumor recurrence. EXPERIMENTAL DESIGN: An orthotopic xenograft murine model was utilized to describe the natural temporal course of osteosarcoma growth. Tumors were treated either with surgery alone, surgery and single-agent chemotherapy, or surgery and dual-agent chemotherapy to assess the relationship between surgical margin and local recurrence. The effect of BMP-2 on local recurrence was similarly assessed. RESULTS: Osteosarcoma tumor growth was categorized into reproducible phases. Margins greater than 997 µm resulted in local control following surgery alone. Margins greater than 36 µm resulted in local control following surgery and single-agent chemotherapy. Margins greater than 12 µm resulted in local control following surgery and dual-agent chemotherapy. The application of exogenous BMP-2 does not confer an increased risk of local recurrence. CONCLUSIONS: This model reliably reproduces the clinical, radiographic, and surgical conditions encountered in human osteosarcoma. It successfully incorporates relevant chemotherapy, further paralleling the human experience. Surgical margins required to achieve local control in osteosarcoma can be reduced using single-agent chemotherapy and further decreased using dual-agent chemotherapy. The application of BMP-2 does not increase local recurrence in this model.

Inclusion of soil carbon lateral movement alters terrestrial carbon budget in China.

The lateral movement of soil carbon has a profound effect on the carbon budget of terrestrial ecosystems; however, it has never been quantified in China, which is one of the strongest soil erosion areas in the world. In this study, we estimated that the overall soil erosion in China varies from 11.27 to 18.17 Pg yr(-1) from 1982 to 2011, accounting for 7-21% of total soil erosion globally. Soil erosion induces a substantial lateral redistribution of soil organic carbon ranging from 0.64 to 1.04 Pg C yr(-1). The erosion-induced carbon flux ranges from a 0.19 Pg C yr(-1) carbon source to a 0.24 Pg C yr(-1) carbon sink in the terrestrial ecosystem, which is potentially comparable in magnitude to previously estimated total carbon budget of China (0.19 to 0.26 Pg yr(-1)). Our results showed that the lateral movement of soil carbon strongly alters the carbon budget in China, and highlighted the urgent need to integrate the processes of soil erosion into the regional or global carbon cycle estimates.

Estimation and inference on correlations between biomarkers with repeated measures and left-censoring due to minimum detection levels.

Statistical approaches for estimating and drawing inference on the correlation between two biomarkers that are repeatedly assessed over time and subject to left-censoring because minimum detection levels are lacking. We propose a linear mixed-effects model and estimate the parameters with the Monte Carlo expectation maximization (MCEM) method. Inferences regarding the model parameters and the correlation between the biomarkers are performed by applying Louis's method and the delta method. Simulation studies were conducted to compare the proposed MCEM method with existing methods including the maximum likelihood estimation method, the multiple imputation method, and two widely used ad hoc approaches: replacing the censored values with the detection limit or with half of the detection limit. The results show that the performance of the MCEM with respect to relative bias and coverage probability for the 95% confidence interval is superior to the detection limit and half of the detection limit approaches and exceeds that of the multiple imputation method at medium to high levels of censoring, and the standard error estimates from the MCEM method are close to ideal. The maximum likelihood estimation method can estimate the parameters accurately; however, a nonpositive definite information matrix can occur so that the variances are not estimable. These five methods are illustrated with data from a longitudinal human immunodeficiency virus study to estimate and draw inference on the correlation between human immunodeficiency virus RNA levels measured in plasma and in cervical secretions at multiple time points.