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Nevin Manimala Statistics

Statistical significance of PM2.5 and O3 trends in China under long-term memory effects

Sci Total Environ. 2023 Jun 2:164598. doi: 10.1016/j.scitotenv.2023.164598. Online ahead of print.

ABSTRACT

Over the past decade, the Chinese government has implemented the “Clean Air Action” measures to enhance the atmospheric environmental quality, primarily focusing on curbing PM2.5 and O3 concentrations. The efficacy of these strategies and the underlying causes (human factors or natural variability) of any observed increases or decreases in PM2.5 and O3 concentrations are of great importance. Examining the hourly PM2.5 and O3 concentration time series from six representative regions in China between 2015 and 2021 revealed an overall downward trend in PM2.5 concentrations. However, the O3 concentration time series indicated upward trends in some regions, except for the Northeast area (NE) and Sichuan Basin (SCB). In the context of conventional significance tests, the assumption is typically that the time series’ samples are independent and therefore memoryless. However, in situations where the time series exhibits strong autocorrelation and limited sample size, this assumption can lead to an overestimation of the statistical significance of the linear trend. To account for this, we utilized a long-term memory model that can reproduce the long-term persistence of pollutant records to improve the accuracy of significance tests. By comparing the P-values of real and surrogate data generated by the long-term memory model, we found that only PM2.5 concentrations in the Pearl River Delta (PRD) were slightly insignificant. For the remaining five regions, the P-values of PM2.5 concentrations were smaller than the significant level of 0.05, suggesting that the observed downward trends in PM2.5 concentrations are not due to natural variability, thereby confirming the effectiveness of the government’s policies aimed at curbing atmospheric particulate matter in recent years. Our results show that O3 pollution is significantly increasing only in the Beijing-Tianjin-Hebei (BTH) region, beyond natural variability. In contrast, the trends of O3 pollution in many regions of China are markedly impacted by natural and climate variability.

PMID:37271384 | DOI:10.1016/j.scitotenv.2023.164598

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Nevin Manimala Statistics

Distribution of iodine concentration in drinking water in China mainland and influence factors of its variation

Sci Total Environ. 2023 Jun 2:164628. doi: 10.1016/j.scitotenv.2023.164628. Online ahead of print.

ABSTRACT

OBJECTIVE: To identify the current spatial distribution of iodine concentration in drinking water (dWIC) at the township-level across China and its influencing factors through visualization and spatial statistical analysis by the geographic information system.

METHODS: The dWIC for each township was used to describe the distribution by ArcGIS 10.7. The spatial aggregation characteristics were analyzed by spatial auto-correlation analysis. The inverse distance weight method was used to predict the dWIC at nonsampling sites. The correlation between the dWIC and the distance from each township to the Yellow River as well as the depth of tube wells were analyzed by ordinary least squares and geographically weighted regression, respectively.

RESULTS: A total of 37,541 townships were included in this study. dWIC ranged from 0 to 1113.7 μg/L, and the median was 3.3 μg/L. There were 35,606 townships < 40 μg/L (94.85 % of surveyed townships), 40 μg/L ≤ 1015 townships ≤100 μg/L (2.70 % of surveyed townships), and 920 townships > 100 μg/L (2.45 % of surveyed townships). The results were statistically significant of global autocorrelation analysis (Moran’s I = 0.43, Z = 922.15, P < 0.01). local Moran’s I showed that 3128 townships (8.33 % of surveyed townships) belong to H-H cluster areas. The dWIC were partially negatively correlated with the distance from each township to the Yellow River, as well as positively correlated with the depth of tube wells in partial areas.

CONCLUSIONS: The dWIC varied widely across mainland China (from 0 μg/L to 1113.7 μg/L). 94.85 % of surveyed townships were below 40 μg/L and 2.45 % of surveyed townships were exceeding 100 μg/L. Moreover, the distance from each township to the Yellow River may be one of the geneses of iodine-excess areas. Finally, this study has provided a visible reference of dWIC for the precise control strategy and focused monitoring in China.

PMID:37271383 | DOI:10.1016/j.scitotenv.2023.164628

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What is the role of CT-Based Hounsfield Unit assessment in the evaluation of Bone Mineral Density in patients undergoing 1- or 2-level lumbar spinal fusion for degenerative spinal pathologies? – A prospective study

Spine J. 2023 Jun 2:S1529-9430(23)00230-9. doi: 10.1016/j.spinee.2023.05.015. Online ahead of print.

ABSTRACT

BACKGROUND CONTEXT: Computed tomography-based vertebral attenuation values (CT-based HU) have been shown to correlate with T-scores on DEXA scan; and have been acknowledged as an independent factor for predicting fragility fractures. Most patients undergoing lumbar surgeries require CT as part of their pre-operative evaluation.

PURPOSE: The current study was thus planned to evaluate the role of lumbar CT as an opportunistic investigation in determining BMD pre-operatively in patients undergoing lumbar fusion.

STUDY DESIGN: Prospective cohort study PATIENT SAMPLE: : Patients older than 45 years, who underwent one- to two-level lumbar (L3-S1 levels) fusions OUTCOME MEASURES: : Comparison of the quantitative assessment of osteoporosis using Hounsfield Units on CT (L1-L5) and mean lumbar T-scores on DEXA (Dual Energy Xray Absorptiometry) HYPOTHESIS: : HU on CT is comparable to T-score on DEXA as a suitable modality for the assessment of osteoporosis in patients undergoing 1-2 level lumbar fusion METHODS: : A prospective cohort study was conducted between January and December 2021. Patients older than 45 years, who underwent one- to two-level lumbar (L3-S1 levels) fusions and had complete clinico-radiological records, were prospectively enrolled. A comparison was drawn between the HU [measured by placing an oval region of interest (ROI) over axial, sagittal and coronal images of lumbar vertebrae] on CT and T-scores on DEXA, and analyzed statistically. The HU values correlating best with normal (group A), osteopenia (B) and osteoporosis (C) categories (classified based on T-scores of lumbar spines) were determined statistically.

RESULTS: Overall, 87 patients [mean age of 60.56±11.63 years; 63 (72.4%) female patients] were prospectively studied. There was a statistically significant difference in the mean age (p=0.01) and sex distribution (predominantly female patients; p=0.03) of patients belonging to groups B (osteopenic) and C (osteoporotic patients), as compared with group A. The greatest correlation between T-score (on DEXA) and HU (on CT) for differentiating osteopenia (group B) from group A was observed at levels L1 (p<0.001), L2 (p<0.001) and L3 (p<0.001). Based on receiver-operating characteristic (ROC) curve analysis, the cut-off values for HU for identifying osteopenia were 159 (at L1; sensitivity 81.6 and specificity 80) and 162 (at L2; sensitivity 80 and specificity 71.1). In addition, there was statistically significant correlation between T-score (on DEXA) and HU at all the lumbar levels for distinguishing osteoporosis (group C), although the difference was most evident at the upper lumbar (L1 and L2) levels (p<0.001). Based on ROC analysis, cut-off HU values for defining osteoporosis were 127 (at L1; sensitivity 71.3 and specificity 70) and 117 (at L2; sensitivity 65.5 and specificity 90).

CONCLUSION: Based on our study, the measurement of HU on CT at upper lumbar levels can be considered as “surrogate marker” for BMD in the diagnosis of osteopenia (cut-off: 159 at L1, 162 at L2) and osteoporosis (cut-off: 127 at L1, 117 at L2) in patients undergoing lumbar fusion surgeries. The HU measurements on CT at the lower lumbar levels (L4 and L5) are less reliable in this pre-operative scenario.

PMID:37271374 | DOI:10.1016/j.spinee.2023.05.015

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Revisiting the relationship between examination pass rate and eligibility pathway among candidates for pharmacist board certification

J Am Pharm Assoc (2003). 2023 Jun 2:S1544-3191(23)00167-X. doi: 10.1016/j.japh.2023.05.022. Online ahead of print.

ABSTRACT

BACKGROUND: Pharmacists with specialized knowledge and skills are able to seek board certification from the Board of Pharmacy Specialties (BPS). In 2018, BPS conducted research to evaluate the relationship between eligibility pathways (i.e., completion of a PGY2 specialty residency, completion of a PGY1 residency plus 2 years of practice experience, or 4 years of practice experience) and certification examination pass rate. The study found statistically significant differences in pass rate based on eligibility criteria across all six specialties studied. There was a trend for higher pass rates in cohorts of examinees eligible for board certification based on completion of postgraduate residency training.

OBJECTIVES: To compare examination pass rates among different eligibility cohorts for board certification in recognized pharmacy practice specialties and compare contemporary findings to previously published findings.

METHODS: This cross-sectional study was conducted on data retrieved from BPS certification applications and examination administration records for examinees in the United States and Canada for nine certification programs. A chi-square analysis was utilized to identify if there were differences in pass rate among eligibility pathway cohorts.

RESULTS: Results: 14,894 examinees met inclusion criteria. 6312 (42.4%) of the 14,894 examinees analyzed were eligible via practice experience, 5768 (38.7%) were eligible via PGY1 completion, and 2814 (18.9%) were eligible via PGY2 completion. A statistically significant difference was found for the relationship between pass rate and eligibility pathway for eight of nine BPS certification examinations analyzed (significant: BCACP, BCCCP, BCCP, BCIDP, BCOP, BCPP, BCPPS, BCPS; not significant: BCTXP). Post-hoc analyses showed that in most cases, the PGY2 eligibility cohort outperformed the PGY1 eligibility cohort, which in turn outperformed the practice experience pathway cohort.

CONCLUSION: Analysis of contemporary BPS certification examination administration data yields statistically significant differences among the pass rates by eligibility pathway, replicating previous findings and expanding the scope of the analysis.

PMID:37271347 | DOI:10.1016/j.japh.2023.05.022

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Inequities in the treatment of opioid use disorder: A scoping review

J Subst Use Addict Treat. 2023 Jun 2:209082. doi: 10.1016/j.josat.2023.209082. Online ahead of print.

ABSTRACT

BACKGROUND: Given the lack of access to evidenced-based OUD treatment and the corresponding overdose crisis, researchers must evaluate and report health care inequities involving the treatment of OUD. Additionally, clinicians should be aware of these inequities in the treatment of patients.

METHODS: We carried out a scoping review of the literature regarding health inequities in treatment for OUD in July 2022. The study team retrieved articles published between 2016 and 2021 from MEDLINE and Ovid Embase. After authors received training, screening and data extraction were performed in masked, duplicate fashion. The team screened a total of 3673 titles and abstracts, followed by 172 articles for full-text review. The inequities that we examined were race/ethnicity, sex or gender, income, under-resourced/rural, occupational status, education level, and LGBTQ+. We used Stata 17.0 (StataCorp, LLC, College Station, TX) to summarize data and statistics of the studies within our sample.

RESULTS: A total of 44 studies evaluating inequities in OUD treatment met inclusion criteria. The most common inequity that studies examined was race/ethnicity (34/44 [77.27 %] studies), followed by under-resourced/rural (19/44 [43.18 %] studies), and sex or gender (18/44 [40.91 %] studies). LGBTQ+ (0/44 [0.0 %] studies) was not reported in the included studies. Our results indicate that many historically marginalized populations experience inequities related to access and outcomes in OUD treatment. The included studies in our scoping review occasionally demonstrated inconsistent findings.

CONCLUSIONS: Gaps exist within the literature on health inequities in treatment for OUD. The most examined inequities were race/ethnicity, under-resourced/rural and sex or gender, while studies did not examine LGBTQ+ status. Future research should aim to advance and supplement literature investigating health inequities in OUD treatment to ensure inclusive, patient-centered care.

PMID:37271346 | DOI:10.1016/j.josat.2023.209082

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Nutritional drinks and enteral feeds promote the growth of Carbapenemase-producing Enterobacterales in conditions that simulate disposal in hospital sinks

J Hosp Infect. 2023 Jun 2:S0195-6701(23)00161-5. doi: 10.1016/j.jhin.2023.05.008. Online ahead of print.

ABSTRACT

BACKGROUND: Studies have shown that nutritional products are discarded via handwashing sinks by healthcare workers, and this practice may promote bacterial growth, including of pathogens such as Carbapenemase-producing Enterobacterales (CPE). Outbreaks and acquisition of CPE in nosocomial settings are associated with negative outcomes for patients and hospitals.

OBJECTIVES: To investigate potential growth-promoting effect of nutritional support drinks (NSDs) and enteral tube-feed products (ETFPs) on CPE.

METHODS: Six different CPE strains were grown in 5 different diluted NSD, 5 different diluted ETFP, Mueller Hinton Broth (MHB) and M9 minimal salts media to simulate discarding of a small volume of nutritional product in a u-bend, already containing liquid. CPE were enumerated at 0h, 6h and 24h, and compared using two-way ANOVA and Dunett test, with confidence levels at 95%. Spearman’s r (rho) was used to measure strength of correlation between concentrations components in nutritional products and CPE growth.

RESULTS: All NSDs and ETFPs promoted CPE growth that exceeded both M9 (negative growth control) and MHB (positive growth control). In several cases, growth in NSDs/ETFPs reached statistical significance compared to growth in MHB.

CONCLUSION: Nutritional products support CPE growth under in-vitro conditions. The propensity of CPE to survive in drain pipework suggests that inappropriate product disposal, may further nourish established CPE in these environmental reservoirs. The growth observed in diluted NSDs and ETFPs signals that modifiable practices should be optimized to mitigate potential CPE transmission risk from these reservoirs.

PMID:37271316 | DOI:10.1016/j.jhin.2023.05.008

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What do Portuguese cardiologists think and feel about their work?

Rev Port Cardiol. 2023 Jun 2:S0870-2551(23)00280-9. doi: 10.1016/j.repc.2022.11.008. Online ahead of print.

ABSTRACT

INTRODUCTION AND OBJECTIVES: This study reports the results of an online survey carried out by the Portuguese Society of Cardiology about its medical members’ work characteristics before and during the COVID-19 pandemic, their job satisfaction, work motivation, and burnout.

METHODS: A sample of 157 participants answered a questionnaire with demographic, professional, and health-related information, followed by questionnaires on job satisfaction and motivation designed and validated for this study and a Portuguese version of the Maslach Burnout Inventory. Data were analyzed through descriptive statistics, ANOVA, and MANOVA, considering gender, professional level, and sector of activity, respectively. Multiple regression was used to assess the impact of job satisfaction and motivation on burnout.

RESULTS: The only variable that distinguished participants was sector of activity. Cardiologists working in the private sector worked fewer weekly hours during COVID-19, while those in the public sector worked more. The latter expressed more desire to reduce their working hours than those who worked in private medicine and in both sectors. There were no differences between sectors in work motivation, while job satisfaction was higher in the private sector. Moreover, job satisfaction negatively predicted burnout.

CONCLUSIONS: Our findings point to a deterioration in working conditions during the COVID-19 pandemic, with its consequences being felt especially in the public sector, which may have contributed to the lower levels of satisfaction among cardiologists who worked exclusively in this sector, but also for those working in both public and private sectors.

PMID:37271307 | DOI:10.1016/j.repc.2022.11.008

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Inflammatory bowel disease and asthma. Results from the RHINE study

Respir Med. 2023 Jun 2:107307. doi: 10.1016/j.rmed.2023.107307. Online ahead of print.

ABSTRACT

BACKGROUND: Asthma and inflammatory bowel disease (IBD) are common inflammatory diseases. The aim of this study was to investigate the associations of IBD with asthma and respiratory symptoms.

METHODS: This study is based on 13,499 participants from seven northern European countries that filled in a postal questionnaire on asthma, respiratory symptoms, IBD including ulcerative colitis and Crohn’s disease and various lifestyle variables.

RESULTS: There were 195 participants with IBD. The prevalence of asthma (14.5 vs 8.1%, p = 0.001), different respiratory symptoms (range 11.9-36.8% vs range 6.0-18.6%, p < 0.005), non-infectious rhinitis (52.1 vs. 41.6%, p = 0.004) and chronic rhinosinusitis (11.6 vs 6.0%, p = 0.001) were higher in subjects with IBD than in those without IBD. In multivariable regression analysis, the association between IBD and asthma was statistically significant (OR 1.95 (95% CI 1.28-2.96)) after adjusting for confounders such as sex, BMI, smoking history, educational level and physical activity. There was a significant association between asthma and ulcerative colitis (adjusted OR 2.02 (95% CI 1.27-2.19)), and asthma but not Crohn’s disease (adjusted OR 1.66 (95% CI 0.69-3.95)). A significant gender interaction was found with a significant association between IBD and asthma in women but not in men ((OR 2.72 (95% CI 1.67-4.46) vs OR 0.87 (95% CI 0.35-2.19), p = 0.038).

CONCLUSIONS: Patients with IBD, particularly those with ulcerative colitis and female, have a higher prevalence of asthma and respiratory symptoms. Our findings indicate that it is important to consider respiratory symptoms and disorders when examining patients with manifest or suspected IBD.

PMID:37271300 | DOI:10.1016/j.rmed.2023.107307

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Altered beta band spatial-temporal interactions during negative emotional processing in major depressive disorder: An MEG study

J Affect Disord. 2023 Jun 2:S0165-0327(23)00752-8. doi: 10.1016/j.jad.2023.06.001. Online ahead of print.

ABSTRACT

BACKGROUND: The mood-concordance bias is a key feature of major depressive disorder (MDD), but the spatiotemporal neural activity associated with emotional processing in MDD remains unclear. Understanding the dysregulated connectivity patterns during emotional processing and their relationship with clinical symptoms could provide insights into MDD neuropathology.

METHODS: We enrolled 108 MDD patients and 64 healthy controls (HCs) who performed an emotion recognition task during magnetoencephalography recording. Network-based statistics (NBS) was used to analyze whole-brain functional connectivity (FC) across different frequency ranges during distinct temporal periods. The relationship between the aberrant FC and affective symptoms was explored.

RESULTS: MDD patients exhibited decreased FC strength in the beta band (13-30 Hz) compared to HCs. During the early stage of emotional processing (0-100 ms), reduced FC was observed between the left parahippocampal gyrus and the left cuneus. In the late stage (250-400 ms), aberrant FC was primarily found in the cortex-limbic-striatum systems. Moreover, the FC strength between the right fusiform gyrus and left thalamus, and between the left calcarine fissure and left inferior temporal gyrus were negatively associated with Hamilton Depression Rating Scale (HAMD) scores.

LIMITATIONS: Medication information was not involved.

CONCLUSION: MDD patients exhibited abnormal temporal-spatial neural interactions in the beta band, ranging from early sensory to later cognitive processing stages. These aberrant interactions involve the cortex-limbic-striatum circuit. Notably, aberrant FC in may serve as a potential biomarker for assessing depression severity.

PMID:37271293 | DOI:10.1016/j.jad.2023.06.001

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Changes in anxiety and depression in patients with different income levels through the COVID-19 pandemic

J Affect Disord. 2023 Jun 2:S0165-0327(23)00754-1. doi: 10.1016/j.jad.2023.06.003. Online ahead of print.

ABSTRACT

BACKGROUND: Lower socioeconomic status is known to be associated with high mental health burden, there have been few epidemiological studies showing how socioeconomic status has modified the effect of COVID-19 on anxiety and depression.

METHODS: We analyzed data from the National Health Interview Survey in the United States between 2019 and 2021 and used respondents with a documented income-to-poverty ratio as a measure of income level (n = 79,468). We used frequency of medication use and self-reported frequency of anxious and depressive episodes as the main outcome measures. We performed a multivariable logistic regression with a two-way interaction term between income and survey year.

RESULTS: We found a statistically significant worsening of depression and anxiety metrics in respondents with higher income levels from 2019 to 2021. We did not observe a significant change in anxiety and depression metrics for low-income respondents over the same period.

LIMITATIONS: The data from the NHIS survey is limited primarily by sampling bias (response rate of 50.7 % in 2021), as well as the self-reported nature of the one of the outcome measures.

CONCLUSION: These findings suggest that, within the limits of the National Health Interview Survey, mental health outcomes were worse but stable in a socioeconomically disadvantaged demographic between 2019 and 2021. In a higher socioeconomic bracket, mental health outcomes were less severe than the disadvantaged demographic but were worsening at a greater rate.

PMID:37271292 | DOI:10.1016/j.jad.2023.06.003