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In RISE, TV46000 once monthly (q1m) or once every 2 months (q2m) significantly extended time to impending schizophrenia relapse. The current study (SHINE, NCT03893825) evaluated the long-term safety, tolerability, and effect of TV46000.
Methods
Patients completing RISE without relapse (rollover) or newly recruited (de novo) were eligible. The de novo and placebo rollover cohorts were randomized 1:1 to q1m or q2m for ≤56 weeks; the TV46000 rollover cohort continued assigned regimen. Exploratory efficacy endpoints included time to impending relapse and patient centered outcomes (PCOs) including Schizophrenia Quality of Life Scale (SQLS).
Results
334 patients were randomized and received TV46000 q1m (n=172) or q2m (n=162), for 202.3 patient-years [PY] of TV-46000 treatment. Treatment-emergent adverse events (AEs) reported for ≥5% of patients were: overall–injection site pain (event rate/100 PY, n [%]; 23.23, 16 [5%]); de novo (n=109)–injection site pain (56.10, 11 [10%]), injection site nodule (16.03, 6 [6%]), blood creatine phosphokinase increased (16.03, 8 [7%]), urinary tract infection (10.69, 7 [6%]); placebo rollover (n=53)–tremor (18.50, 5 [9%]); TV46000 rollover (n=172)–headache (7.97, n=8 [5%]). Serious AEs reported for ≥2 patients were worsening schizophrenia and hyperglycemia. Kaplan– Meier estimates for remaining relapse-free at week 56 were 0.98 (2% risk; q1m) and 0.88 (12%; q2m). SQLS improved for q1m (least-squares mean change [SE], − 2.16 [0.98]) and q2m (− 0.43 [0.98]); other PCOs (5Level EuroQoL 5Dimensions Questionnaire, Personal and Social Performance Scale, Drug Attitudes Inventory 10-item version) remained stable.
Conclusions
TV-46000 had a favorable long-term benefit–risk profile in patients with schizophrenia.
Vasomotor symptoms (hot flashes) are the most common symptom of menopause, affecting about 75% of menopausal women and about 40% of perimenopausal women. PH80, an investigational neuroactive nasal spray, is hypothesized to be a potential treatment for moderate to severe hot flashes due to menopause given that it rapidly activates olfactory to limbic-hypothalamic neural circuits that control autonomic activity, including body temperature and sweating. The primary objective of this Phase 2A clinical study was to explore the efficacy, safety, and tolerability of intranasal administration of PH80 for the acute management of hot flashes due to menopause.
Methods
The study was a randomized, double-blind, placebo-controlled, exploratory Phase 2A clinical study. PH80 nasal spray containing epoxyestrenolone 0.8 μg per 50 μL was self-administered intranasally; two sprays in each nostril (total dose = 3.2 μg) up to four times daily as needed for 4 consecutive weeks. One additional dose was allowed at night if subjects were awakened by hot flashes. During the study period, subjects recorded the number and severity of hot flashes, disruption in function, and sweating related to hot flashes. Patient global impression of change (PGI-C) and clinician global impression of severity (CGI-S) were also assessed.
Results
At baseline, subjects reported a daily mean of 7.7 hot flashes in the PH80 group (n = 18) and 8.0 in the placebo group (n = 18). After 1 week of treatment, the number of hot flashes dropped to 2.8 for PH80 and 6.4 for placebo (P <.001), and after 4 weeks of treatment, the number of hot flashes dropped to 1.5 for PH80 and 5.1 for placebo (P <.001). Treatment with PH80 significantly reduced the severity, disruption in function, and sweating associated with hot flashes during the treatment period as compared with subjects in the placebo group. There was a significant improvement in PGI-C for PH80 vs placebo at endpoint (P = .015) and a strong trend for improvement on CGI-S (P = .053). PH80 was well-tolerated with no serious adverse events (AEs); the AE profiles of PH80 and placebo were comparable. All 36 subjects completed 4 weeks of treatment and with no study discontinuations due to AEs.
Conclusions
The rapid onset, significant reduction in symptoms, and improved function induced by intranasal PH80 in menopausal women with hot flashes compared with placebo, observed as early as the end of week 1 of treatment, provide a strong signal for continued development of PH80 for the acute treatment of hot flashes due to menopause. The safety data further suggest that, if approved, PH80 will provide a substantial safety benefit over all currently available agents.
Funding
Vistagen Therapeutics, Inc. Editorial assistance was provided by Peloton Advantage, an OPEN Health company, funded by Vistagen Therapeutics, Inc.
Continuous permafrost is present across the McMurdo Dry Valleys of southern Victoria Land, Antarctica. While summer active-layer thaw is common in the low-elevation portions of the Dry Valleys, active layers have not significantly thickened over time. However, in some locations, coastal Antarctic permafrost has begun to warm. Here, based on soil and meteorological measurements from 1993 to 2023, we show that wintertime soil temperatures have increased across multiple sites in the Dry Valleys, at rates exceeding the pace of summer soil warming. Linear warming trends over time are significant (P < 0.05) at six of seven soil monitoring sites. Winter warming is strongly correlated with increased numbers of down-valley wind events (Foehn/katabatics), but it may also be driven by increased incident longwave radiation at some stations (although winter longwave increase is not significant over time). While down-valley wind events increase winter warming, when down-valley wind events are excluded from the record, winter soil warming remains persistent and significant, suggesting that Antarctic soils are experiencing less cold winters over time in response to regional warming. Together, these observations suggest that some Antarctic permafrost may be approaching a transition to discontinuous permafrost in some regions as winter freezing intensity is reduced over time.
The gated community is a unique site of social reproduction which has proliferated across India. Elite families are reproduced at the individual, household level but also at the communal level in service-rich private enclaves. These households rely heavily on specialised reproductive labourers who are deprived of worker status because they work in the private domain. Homeowners’ associations or resident welfare associations (RWAs) meanwhile regulate reproductive labour through surveillance and wage fixing and by regulating entry and exit. Despite their public function, RWAs claim no responsibility for worker welfare due to privity of contract and the exclusion of ‘domestic service’ from labour laws. We examine India’s new labour codes, establishment laws and constitutional law to pin responsibility on RWAs as public bodies for ensuring the fundamental rights and welfare of these workers.
Mangroves are a natural defence of the coastal strip against extreme waves. Furthermore, innovative techniques of naturally based coast defence are used increasingly, according to the canons of eco-hydraulics. Therefore, it is important to correctly evaluate the transmission of waves through cylinder arrays. In the present paper, the attenuation of solitary waves propagating through an array of rigid emergent and submerged cylindrical stems on a horizontal bottom is investigated theoretically, numerically and experimentally. The results of the theoretical model are compared with the numerical simulations obtained with the smoothed particle hydrodynamics meshless Lagrangian numerical code and with experimental laboratory data. In the latter case, solitary waves were tested on a background current, in order to reproduce more realistic sea conditions, since the absence of circulation currents is very rare in the sea. The comparison confirmed the validity of the theoretical model, allowing its use for the purposes indicated above. Furthermore, the present study allowed for an evaluation of the bulk drag coefficient of the rigid stem arrays used, as a function of their density, the stem diameter, and their submergence ratio.
First-order stochastic dominance is a core principle in rational decision-making. If lottery A has a higher or equal chance of winning an amount $x $ or more compared to lottery B for all x, and a strictly higher chance for at least one $x $, then A should be preferred over B. Previous research suggests that violations of this principle may result from failures in recognizing coalescing equivalence. In Expected Utility Theory (EUT) and Cumulative Prospect Theory (CPT), gambles are represented as probability distributions, where probabilities of equivalent events can be combined, ensuring stochastic dominance. In contrast, the Transfer of Attention Exchange (TAX) model represents gambles as trees with branches for each probability and outcome, making it possible for coalescing and stochastic dominance violations to occur. We conducted two experiments designed to train participants in identifying dominance by splitting coalesced gambles. By toggling between displays of coalesced and split forms of the same choice problem, participants were instructed to recognize stochastic dominance. Despite this training, violations of stochastic dominance were only minimally reduced, as if people find it difficult—or even resist—shifting from a trees-with-branches representation (as in the TAX model) to a cognitive recognition of the equivalence among different representations of the same choice problem.
Explore the relationship between water insecurity and food security and their covariates in Mexican households.
Design:
A cross-sectional study with nationally representative data from the National Health and Nutrition Survey-Continuous 2021 (in Spanish, ENSANUT-Continua 2021), collected data from 12,619 households.
Setting:
Water insecurity was measured using the Household Water Insecurity Experiences (HWISE) Scale in Spanish and adapted to the Mexican context. Food security was measured using the Latin American and Caribbean Food Security Scale (ELCSA). A generalized path model was used to produce two simultaneous logistical regression equations--of water insecurity (WI, HWISE ≥12) and moderate-to-severe food insecurity (FI)—to understand key covariates as well as the contribution of WI to FI.
Participants:
The head of the household, an adult of >18 years of age, consented to participate in the survey.
Results:
Households experiencing WI were more likely to experience moderate to severe FI (OR=2.35; 95%CI: 2.02-2.72). The odds of WI were lower in households with medium (OR=0.74; 95%CI: 0.61-0.9) to high (OR=0.45; 95%CI: 0.37-0.55) asset scores. Water insecurity also depended on the region of Mexico. FI is more prevalent in Indigenous people (OR=1.29; 95%CI: 1.05-1.59) and rural households (OR=0.42; 95%CI: 1.16-1.73). Notably, wealth and household size did not contribute directly to FI but did so indirectly through the mediating factor of WI.
Conclusions:
Our study shows that there are structural factors that form part of the varied determinants of water insecurity, which in turn is closely linked to food insecurity.
Rasoul Namazi's Leo Strauss and Islamic Political Thought contains patient and perceptive readings of four texts Strauss devoted to Islamic political philosophy. My comments are limited to just one of those readings, that of “Fârâbî's Plato,” and to a single issue within it—the question of the identity of the philosopher or of philosophy. Namazi rightly recognizes the centrality of this question in “Fârâbî's Plato.” As Strauss writes in explaining Alfarabi's view of Plato's philosophy, “the central question concerns . . . the precise meaning of the philosopher” (361), and Namazi claims that it is “one of the main themes or even the theme of ‘Fârâbî's Plato’” (148, emphasis original).
The two distinct audiences Namazi identifies for his book are those interested in either Strauss or medieval Islamic philosophy. But his engrossing study of Strauss's engagement with Islamic political thought carries value for a wider audience beyond these specializations. Considering Strauss's engagement with medieval Islamic philosophy raises questions of significance regarding the relationship between European and Islamic thought. Namazi does not raise these questions directly, but this thoughtful study is valuable for those looking to understand and delineate the distinctiveness of European thought.
This paper describes a reverse engineering methodology so as to accomplish an aero-propulsive modelling (APM) through implementing a drag polar estimation for a case study jet aircraft in case of the absence of the thrust data of the aircraft’s engine. Since the available thrust force can be replaced by the required thrust force for the sustained turn, this approach allows the elimination for the need of the thrust parameter in deriving an aero-propulsive model utilising equations of motion. Two different modelling approaches have been adopted: (i) implementing the 6-DOF model data for sustained turn and climb flight to achieve induced drag model; and then incorporating the glide data to obtain the total drag polar model; (ii) using the 6-DOF model data together with introducing the effect of CL-α dependency. The error assessments showed that the derived CSA models were able to predict the drag polar values accurately, providing linear correlation coefficient (R) values equal to 0.9982 and 0.9998 for the small α assumption and CL-α dependency, respectively. A direct comparison between the trimmed CD values of 6-DOF model and the values predicted by the CSA model was accomplished, which yielded highly satisfactory results within high subsonic and transonic CL values.
Valbenazine and deutetrabenazine (vesicular monoamine transporter 2 inhibitors) are approved for tardive dyskinesia (TD) treatment in adults. To prevent potential drug-drug interactions (DDIs), valbenazine labeling recommends doses 40 mg/day when taking strong CYP3A4 or CYP2D6 inhibitors and avoidance of strong CYP3A4 inducers and monoamine oxidase inhibitors (MAOIs). Deutetrabenazine labeling recommends doses ≤36-mg/day when taking strong CYP2D6 inhibitors and avoidance of MAOIs. This study estimated proportions of patients with TD at risk of DDIs with valbenazine/deutetrabenazine in real-world practice.
Methods
Patients aged ≥18 years with TD and ≥1 antipsychotic claim(s) and no valbenazine/ deutetrabenazine claims ≥3 months prior and ≥12 months after diagnosis were identified in the Symphony Health Sciences database (US-based medical, hospital, and pharmacy claims database). Proportions of patients meeting valbenazine/deutetrabenazine concomitant medication labeling restrictions were summarized descriptively.
Results
14,264/66,046 patients with TD met inclusion criteria. Proportions of patients at potential risk of DDIs were lower with deutetrabenazine ≤36 mg/day (0.2%) and >36 mg/day (21%) versus valbenazine 40 mg/day (4.4%; 22-times difference) and >40 mg/day (28%; 1.3-times difference). Across age groups, underlying conditions (major depressive, mood, and bipolar disorders; schizophrenia), and payer types, proportions of patients at potential risk of DDIs were lower with deutetrabenazine ≤36 mg/day (0.0%– 0.5%) and >36 mg/day (14%– 30%) versus valbenazine 40 mg/day (3%– 5%; 8.0- to >40.0times difference) and >40 mg/day (22%– 35%; 1.2- to >1.5-times difference).
Conclusions
Estimated proportions of patients with TD at potential risk of DDIs was lower with deutetrabenazine versus valbenazine overall and across age, underlying conditions, and payer types.
Numerical simulations are conducted to investigate particle suspension and deposition within turbidity currents. Utilizing Lagrangian particle tracking and a discrete element model, our numerical approach enables a detailed examination of autosuspension, deposition and bulk behaviours of turbidity current. We specifically focus on flow regimes where particle settling and buoyancy-induced hydrodynamics play equally important roles. Our discussion is divided into three parts. Firstly, we examine the main body of the current formed by suspended particles, revealing a temporal evolution consisting of initial slumping, propagation and dissipation stages. Our particle calculation allows for the tracking of autosuspended particles, enabling a deeper understanding of the connection between autosuspension and current propagation through energy budget analysis. In the second part, we delve into particle deposition, highlighting transverse and longitudinal variations. Transverse variations arise from lobe-and-cleft (LC) flow features, while longitudinal variations result from vortex detachment, particularly notable with large-sized particles. We observe that as particle size increases, leading to a particle Stokes number greater than 0.1, rapid particle settling suppresses the LC flow structure, resulting in wider lobes at the deposition height. Lastly, we propose a new scaling law for the propagation speed and current length. Our simulation results demonstrate close agreement with this new scaling law, providing valuable insights into turbidity current dynamics.
The potential influence of the timing of eating on body weight regulation in humans has attracted substantial research interest. This review aims to critically evaluate the evidence on timed eating for weight loss, considering energetic and behavioural components to the timing of eating in humans. It has been hypothesised that timed eating interventions may alter energy balance in favour of weight loss by enhancing energy expenditure, specifically the thermic effect of food. This energetic effect has been suggested to explain greater weight loss which has been observed with certain timed eating interventions, despite comparable self-reported energy intakes to control diets. However, timed eating interventions have little impact on total daily energy expenditure, and the apparent effect of time of day on the thermic effect of food largely represents an artefact of measurement methods that fail to account for underlying circadian variation in resting metabolic rate. Differences in weight loss observed in free-living interventions are more likely explainable by real differences in energy intake, notwithstanding similar self-reported energy intakes. In addition, the energetic focus tends to overlook the role of behavioural factors influencing the timing of eating, such as appetite regulation chronotype-environment interactions, which may influence energy intake under free-living conditions. Overall, there is scant evidence that timed eating interventions are superior to general energy restriction for weight loss in humans. However, the role of behavioural factors in influencing energy intake may be relevant for adherence to energy-restricted diets, and this aspect remains understudied in human intervention trials.
Typical and atypical antipsychotics (AAPs) are the main treatment options among patients with schizophrenia. However, AAPs have been associated with several side effects and comorbid conditions. To manage side effects, often patients are prescribed concomitant medications to manage their condition, increasing polypharmacy. Though common in practice, the prevalence of concomitant medication use in patients with schizophrenia is not well established. This study evaluated the annual prevalence of concomitant medications among patients with schizophrenia who were prescribed AAPs.
Methods
This retrospective study was conducted using the PharMetrics database (01/2019 – 12/2021). Patients were included in the analyses if they had a diagnosis of schizophrenia, were continuously enrolled in pharmacy and medical claims for the full year and were prescribed AAPs. A sensitivity analysis was also conducted among patients who demonstrated ≥50% adherence to their prescribed AAPs (with a grace period of 30 days). For both the main and sensitivity analyses patient populations, the concomitant drugs prescribed were labeled at the drug class (GPI2) and generic drug level. Prevalence for drug class and each drug was calculated as a percentage of patients who were prescribed ≥1 of the agent among those who met the inclusion and exclusion criteria within the given year.
Results
For the year 2019, 2020 and 2021, 12,360; 13,242 and 14,780 patients met the inclusion and exclusion criteria, respectively. The mean age of the cohort ranged from 43.5 - 45.4 years. Patients were predominantly male and commercially insured. Antidepressants were the most prevalent concomitant medication prescribed (2019: 61.2%, 2020: 61.2%, 2021: 62.0%). Other highly prevalent drug classes identified were - anticonvulsants (2019: 44.2%, 2020: 44.5%, 2021: 45.0%), antianxiety agents (2019: 36.3%, 2020: 37.6%, 2021: 38.9%), antihyperlipidemics (2019: 26.3%, 2020: 28.1%, 2021: 30.7%), antihypertensives (2019: 25.7%, 2020: 27.2%, 2021: 28.1%), antiparkinson agents (2019: 61.2%, 2020: 61.2%, 2021: 62.0%), anticholinergics (2019: 61.2%, 2020: 61.2%, 2021: 62.0%) and analgesics (2019: 61.2%, 2020: 61.2%, 2021: 62.0%). At the individual drug level, benzotropine mesylate (2019: 19.5%, 2020: 18.7%, 2021: 18.8%), atorvastatin (2019: 14.5%, 2020: 16.7%, 2021: 18.4%), lorazepam (2019: 14.1%, 2020: 14.7%, 2021: 14.3%), gabapentin (2019: 13.7%, 2020: 13.9%, 2021: 14.8%), and metformin (2019: 13.2%, 2020: 13.7%, 2021: 15.4%) were the most prevalent prescribed concomitant medications. There was no difference when similar analyses were conducted in the adherent patient population.
Conclusions
These results indicate a high prevalence of concomitant antidepressants, antihyperlipidemics, antihypertensives and anticholinergics among patients with schizophrenia who are prescribed AAPs.
To compare the per-patient direct and indirect costs associated with achieving remission with esketamine nasal spray plus oral antidepressants (ESK NS+OAD) versus quetiapine extended release plus oral antidepressants (QTP XR+OAD) among patients with treatment-resistant depression (TRD). This comparison was based on a subanalysis of results from the ESCAPE-TRD Phase 3b trial (ex-US) comparing response and remission rates for ESK NS+OAD vs QTP XR+OAD in TRD patients over 32 weeks.
Methods
An Excel-based model was developed to estimate the cost-per-remitter for ESK NS+OAD and QTP XR+OAD from the perspective of a commercial insurance plan in the US. Remission rates, response rates, and relapse rates (among patients remitting or responding during the first 8 weeks of treatment) were estimated in 4-week intervals over 32 weeks using data from the ESCAPE-TRD Phase 3b clinical trial comparing ESK NS+OAD versus QTP XR+OAD in patients with TRD. Patients not remitting/responding (non-responders) or experiencing a relapse either stayed on current treatment (i.e., ESK NS+OAD or QTP XR+OAD) or discontinued current treatment and initiated either augmented therapy with antipsychotics (APS) or recurring transcranial magnetic stimulation (rTMS). For basecase analysis, equal proportions of non-responders off-treatment initiated rTMS or augmented therapy with APS. In a scenario analysis, all non-responders off-treatment initiated rTMS. Direct costs, including medical and drug costs, were derived from health economic literature and the RED BOOK® drug pricing database. Indirect costs attributed to work productivity loss from presenteeism and absenteeism were derived from a separate analysis of ESCAPE-TRD patients using the Work Productivity and Activity Impairment: Depression (WPAI:D) questionnaire and US Bureau of Labor Statistics survey results.
Results
The cumulative relapse-free remission rate at 32 weeks was 50% for patients receiving ESK NS+OAD and 33% for patients receiving QTP XR+OAD. In the basecase analysis, the cost-per-remitter (including direct and indirect costs) for ESK NS+OAD was $3,102.17 lower than that of QTP XR+OAD. In the scenario where 100% of non-responders off-treatment were assumed to initiate rTMS, the cost-per-remitter (including direct and indirect costs) for ESK NS+OAD was $15,133.66 lower than that of QTP XR+OAD.
Conclusion
These findings suggest that esketamine nasal spray in conjunction with oral antidepressants is a cost-efficient alternative compared with quetiapine extended release for treatment of TRD for commercial insurance plans. The comparative benefits associated with ESK NS+OAD treatment are driven primarily by better short- and long-term efficacy observed in the trial and particularly pronounced when considering the costs associated with lost productivity.
Crowd crush disasters result in psychological risks such as anxiety, depression, and post-traumatic stress disorder (PTSD). This descriptive research study identified the mental health status of Koreans after the Itaewon crowd crush disaster and explored related factors.
Methods
Data were collected May 2-9, 2023 using an online survey. Participants included 205 adults aged 19-69 years recruited through South Korean local and online university communities. Their mental health and related factors were measured at 6 months post-disaster. Data were analyzed using IBM® SPSS® Statistics 26.0. and R 3.4.2.
Results
Significant differences in anxiety, depression, and PTSD among participants who experienced the disaster as victims; changes in drinking frequency and alcohol consumption; and differences in anxiety and PTSD according to family type were observed. Comparing the 3 and 6 month surveys, there were no significant changes in anxiety, depression, PTSD, general mental health, or mental well-being. When mental health severity was divided according to victimization, a significant difference in the severity of anxiety, depression, and PTSD was observed.
Conclusions
Participants’ levels of anxiety, depression, and PTSD varied according to their direct and indirect experience of the disaster, with higher levels of PTSD even without direct experience with the disaster.
Conservation agriculture (CA), as a key component of sustainable intensification, has been widely promoted across sub-Saharan Africa (SSA) to address low crop productivity. However, the focus has mainly been on improving cereal grain yields, with less focus to its impact on nutritional outcomes. This study sought to assess the productivity potential of CA crop diversification systems and associated crop establishment techniques in terms of grain, protein, and energy yields. An on-station trial was implemented in Malawi for four cropping seasons (2014/15 to 2017/18). Four crop establishment techniques (ridge and furrow, jab planter, dibble sticks, and CA basins) were tested, while cropping systems included conventional cropping system (Conv), CA sole cropping (CaSole), CA intercropping (CA-intercropping), and CA rotations (CA-rotation). In 2014/15 and 2015/16 cropping seasons, characterised by medium and low rainfall, respectively, planting basins and ridge-furrow systems produced higher maize yields compared to jab planter and dibble stick systems. In 2015/16, big and small basins yielded 5061 and 3969 kg ha–1, while jab planter and dibble stick yielded 3476 and 3213 kg ha–1. When there was high and persistent rainfall (2016/17 and 2017/18), direct seeding (jab planter and dibble stick) outperformed basins and ridge-furrow systems. Therefore, the choice of planting basin sizes and whether or not to use dibble stick and jab planter needs to be guided by location or site-specific seasonal forecasts for best results. Grain yield in maize-legume rotation systems consistently outperformed other systems, with maize-groundnut rotations surpassing maize-cowpea intercrops by 987–2700 kg ha–1 over four cropping seasons. In intercropping systems, maize-pigeon pea outperformed maize-cowpea by 4–45% during the same period, while maize-cowpea rotation consistently out yielded maize-cowpea intercropping. Intercropping systems, however, provided substantial protein benefits, with maize-pigeon yielding +9.5% (2015/2016), +29.1% (2016/2017) over CA sole, and +2.2% (2017/2018) over cowpea intercropping. Sole systems (conventional and CA sole) yielded the highest caloric energy, while maize-cowpea rotation consistently reduced energy yield by 35% to 54% compared to the highest-yielding systems. Overall intercropping systems can outperform rotation systems in nutritional security but when focus is on maize grain yield alone, intercropping may reduce maize yield when compared to both cereal sole and maize-legume rotation systems.
Patients with chronic kidney disease suffer from immune dysfunction, increasing susceptibility to infections. The aim of the study was to investigate air contamination with respiratory viruses in a dialysis unit at a quaternary hospital using molecular detection techniques and to analyze airflow dynamics through computational fluid dynamics (CFD) simulations for a comprehensive assessment of air transmission risks.
Methods:
We conducted dialysis unit air sampling using AerosolSense™ samplers. Air and clinical sampling occurred during three periods in 2022: winter, early, and late fall. A technical team maintained the dialysis unit’s ventilation system during mid fall. Ventilation system capacity and airflow rates were measured. CFD simulations were used to evaluate airflow dynamics.
Results:
The investigation collected 144 air samples, revealing heterogeneous virus detection rates across locations and study periods. Virus positivity correlated with the presence of patients and the effectiveness of the ventilation system. The ratio of virus air positivity to virus patient positivity was 1.84 and 3.35 during the first and the second periods, respectively, and collapsed to 0.64 after maintenance. Airflow rate measurements highlighted a ninefold discrepancy between actual and theoretical airflow (393 m3/h vs. 3530 m3/h), which was rectified by maintenance actions. Airflow dynamics and particle dispersion visualization through CFD simulations contributed to a better understanding of transmission risks.
Conclusions:
Detection of viruses in the air, combined with CFD, revealed deficiencies in air renewal. Maintenance interventions significantly improved airflow dynamics and particle dispersion, reducing airborne virus spread.
We prove several new congruences for the overcubic partition triples function, using both elementary techniques and the theory of modular forms. These extend the recent list of such congruences given by Nayaka, Dharmendra and Kumar [‘Divisibility properties for overcubic partition triples’, Integers24 (2024), Article no. a80, 9 pages]. We also generalise overcubic partition triples to overcubic partition k-tuples and prove arithmetic properties for these partitions.