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Microorganism motility often takes place within complex, viscoelastic fluid environments, e.g. sperm in cervicovaginal mucus and bacteria in biofilms. In such complex fluids, strains and stresses generated by the microorganism are stored and relax across a spectrum of length and time scales and the complex fluid can be driven out of its linear response regime. Phenomena not possible in viscous media thereby arise from feedback between the swimmer and the complex fluid, making swimming efficiency co-dependent on the propulsion mechanism and fluid properties. Here, we parameterize a flagellar motor and filament properties together with elastic relaxation and nonlinear shear-thinning properties of the fluid in a computational immersed boundary model. We then explore swimming efficiency, defined as a particular flow rate divided by the torque required to spin the motor, over this parameter space. Our findings indicate that motor efficiency (measured by the volumetric flow rate) can be boosted or degraded by relatively moderate or strong shear thinning of the viscoelastic environment.
Addressing aggressive behavior in adolescence is a key step toward preventing violence and associated social and economic costs in adulthood. This study examined the secondary effects of the personality-targeted substance use preventive program Preventure on aggressive behavior from ages 13 to 20.
Methods
In total, 339 young people from nine independent schools (M age = 13.03 years, s.d. = 0.47, range = 12–15) who rated highly on one of the four personality traits associated with increased substance use and other emotional/behavioral symptoms (i.e. impulsivity, anxiety sensitivity, sensation seeking, and negative thinking) were included in the analyses (n = 145 in Preventure, n = 194 in control). Self-report assessments were administered at baseline and follow-up (6 months, 1, 2, 3, 5.5, and 7 years). Overall aggression and subtypes of aggressive behaviors (proactive, reactive) were examined using multilevel mixed-effects analysis accounting for school-level clustering.
Results
Across the 7-year follow-up period, the average yearly reduction in the frequency of aggressive behaviors (b = −0.42; 95% confidence interval [CI] −0.64 to −0.20; p < 0.001), reactive aggression (b = −0.22; 95% CI 0.35 to −0.10; p = 0.001), and proactive aggression (b = −0.14; 95% CI −0.23 to −0.05; p = 0.002) was greater for the Preventure group compared to the control group.
Conclusions
The study suggests a brief personality-targeted intervention may have long-term impacts on aggression among young people; however, this interpretation is limited by imbalance of sex ratios between study groups.
As the incidence of human papillomavirus related oropharyngeal cancer continues to rise, it is increasingly important for public understanding to keep pace. This study aimed to identify areas of patient interest and concern regarding human papillomavirus and oropharyngeal cancer.
Method
This study was a retrospective survey of search queries containing the keywords ‘HPV cancer’ between September 2015 and March 2021.
Results
There was 3.5-fold more interest in human papillomavirus related oropharyngeal cancer (15 800 searches per month) compared with human papillomavirus related cervical cancer (4500 searches per month). Among searches referencing cancer appearance, 96.8 per cent pertained to the head and neck region (3050 searches per month). Among vaccination searches, 16 of 47 (34.0 per cent; 600 searches per month) referenced human papillomavirus vaccines as being a cause of cancer rather than preventing cancer.
Conclusion
The vast majority of online searches into human papillomavirus cancer pertain to the oropharynx. There are relatively few search queries on the topic of vaccination preventing human papillomavirus associated oropharyngeal cancer, which highlights the continued importance of patient education and awareness campaigns.
Delays in the diagnosis and therapy of benign paroxysmal positional vertigo can greatly impact quality of life and increase healthcare costs for patients. This study aimed to appraise the quality of clinical practice guidelines for the diagnosis and management of benign paroxysmal positional vertigo.
Methods
A comprehensive database search of clinical practice guidelines was completed up to 30 October 2021. Four independent reviewers used the Appraisal of Guidelines for Research and Evaluation II instrument in the quality appraisal.
Results
The highest score was in ‘clarity and presentation’ (58.33 ± 22.7). The lowest score was in ‘applicability’ (13.96 ± 30.1). Overall, four clinical practice guidelines were ‘low quality’ and only one guideline was ‘high quality’.
Conclusion
This review identified a significant lack of quality in clinical practice guideline development for benign paroxysmal positional vertigo, highlighting the need for a more rigorous approach for future guideline development.
Evidence of Late Triassic large tetrapods from the UK is rare. Here, we describe a track-bearing surface located on the shoreline near Penarth, south Wales, United Kingdom. The total exposed surface is c. 50 m long and c. 2 m wide, and is split into northern and southern sections by a small fault. We interpret these impressions as tracks, rather than abiogenic sedimentary structures, because of the possession of marked displacement rims and their relationship to each other with regularly spaced impressions forming putative trackways. The impressions are large (up to c. 50 cm in length), but poorly preserved, and retain little information about track-maker anatomy. We discuss alternative, plausible, abiotic mechanisms that might have been responsible for the formation of these features, but reject them in favour of these impressions being tetrapod tracks. We propose that the site is an additional occurrence of the ichnotaxon Eosauropus, representing a sauropodomorph trackmaker, thereby adding a useful new datum to their sparse Late Triassic record in the UK. We also used historical photogrammetry to digitally map the extent of site erosion during 2009–2020. More than 1 m of the surface exposure has been lost over this 11-year period, and the few tracks present in both models show significant smoothing, breakage and loss of detail. These tracks are an important datapoint for Late Triassic palaeontology in the UK, even if they cannot be confidently assigned to a specific trackmaker. The documented loss of the bedding surface highlights the transient and vulnerable nature of our fossil resources, particularly in coastal settings, and the need to gather data as quickly and effectively as possible.
Evaluate durability of pregabalin's effect on pain associated with fibromyalgia (FM).
Methods:
Randomized, double-blind, placebo-controlled trial with 1-week single-blind placebo run-in. Patients meeting ACR diagnostic criteria were randomized to pregabalin 300, 450, or 600 mg/d (BID) or placebo for 14 weeks (2-week dosage escalation; 12-week fixed-dosage). Pain was assessed with a daily pain diary using an 11-point numeric scale. Primary efficacy parameter was the LOCF endpoint mean pain score (MPS). Sensitivity analyses were assessed using the Duration Adjusted Average Change (DAAC) and a Mixed Model Repeated Measurements (MMRM).
Results:
745 randomized patients: 95% female, mean age=50 years, median FM duration=10 years, baseline MPS=6.7. Placebo-corrected differences in mean change from baseline to endpoint in MPS: 300mg/d, -0.71 (P=0.0009); 450mg/d, -0.98 (P<0.0001); 600mg/d, -1.00 (P<0.0001). Mean differences from placebo at endpoint (adjusted for treatment duration) over the entire treatment period (DAAC): 300mg/d, -.38, P=0.0200; 450mg/d, -.62; P=0.0001 and 600mg/d,-.57 P<0.0001. In the MMRM analysis, all 3 pregabalin treatment groups demonstrated pain relief by Week 1, and every weekly assessment thereafter, with the exception of 300mg/d treatment group at Week 11. Most common AEs: dizziness (all pregabalin, 35.8% vs placebo, 7.6%); somnolence (18.0% vs 3.8%). Most AEs were mild to moderate and resolved with continued treatment.
Conclusions:
Pregabalin demonstrated significant reduction in endpoint MPS in FM patients. The DAAC sensitivity analysis confirmed the robustness of this effect. MMRM analyses demonstrated significant pain relief by Week 1 that was maintained throughout pregabalin treatment.
This study (A0081057) was designed to evaluate the long-term safety and efficacy of pregabalin treatment of fibromyalgia (FM).
Methods:
In this 1-year, open-label (OL) extension of a 13-week randomized, placebo-controlled trial of pregabalin FM patients had the option of continuing pregabalin at doses of 150 to 600 mg/d. Efficacy was measured by the Short-Form McGill Pain Questionnaire (SF-MPQ), which included sensory and affective pain descriptors, Present Pain Intensity (PPI) index, and a Visual Analog Scale (VAS).
Results:
429 of 431 screened patients entered OL treatment, 249 (58%) completed, 70 (16.3%) discontinued due to an adverse event (AE), and 110 (25.7%) discontinued for other reasons. Median duration of treatment with pregabalin was 357 days (range, 1-402 days); 114 received pregabalin for ≥1 year. No clinically meaningful increases in dose were noted over the OL treatment period. Weighted mean dose was 414 mg/d in the first 3 months of treatment and 444 mg/d after 9 months of treatment. SF-MPQ sensory, affective, and total scores were improved relative to baseline, VAS pain score decreased 21 points (0-100 scale), and PPI decreased 0.9 point (0-5 scale). The most frequently reported all-causality AEs were dizziness, somnolence, peripheral edema, and increased weight, most of which were mild to moderate in intensity and of limited duration.
Conclusions:
Pregabalin administered for up to 1 year was generally well tolerated by FM patients without evidence of dose increase over time. The sustained improvement in pain measures during OL treatment was consistent with that in shorter term double-blind trials.
Examine the evidence for a relationship between pregabalin effect on pain and baseline anxiety and depressive symptoms in patients with fibromyalgia (FM).
Background:
Chronic pain and concomitant anxiety and depressive symptoms are common in patients with FM, as well as in other chronic pain disorders. Pregabalin was effective for treating pain in FM patients in three parallel group RCTs (105, 1056, 1077) where data for anxiety and depressive symptom levels were collected.
Design/Methods:
Patients meeting ACR criteria for FM with a pain VAS score ≥40 mm were followed for 8-14 weeks in 3 randomized, double-blind, placebo-controlled trials. Patients (N=2022) received 150, 300, 450 or 600mg/d pregabalin or placebo. The primary efficacy parameter was change in endpoint Mean Pain Score (MPS) (range 0 [no pain]-10[worst possible pain]). Regression analyses evaluated whether changes in pain bore any relation to the baseline Hospital Anxiety and Depression Scales (HADS-A) and (HADS-D) levels.
Results:
Pregabalin 300, 450, and 600 mg/d, but not 150 mg/d, showed statistically significant improvements in pain compared with placebo (p<0.0001). For each pregabalin treatment group, improvements in pain at endpoint were not found to have a statistically significant association with baseline levels of anxiety or depressive symptoms. Adverse events (AEs) were consistent with known side effects of pregabalin; dizziness and somnolence, mild to moderate in intensity, were the most frequently reported AEs for pregabalin patients.
Conclusions/Relevance:
Pregabalin treatment demonstrated significant improvements in pain regardless of baseline anxiety or depressive symptom levels for patients with FM.
The education and training of doctors specialising in Child and Adolescent Psychiatry (CAP) varies substantially across Europe. There is a paucity of information available about training quality. This prompted an initial training survey led by Dr E Barrett (2010) which was expanded upon by the CAP working group in the 2010 EFPT international forum in Dubrovnik to create ‘country reports’ for 2010–2011.
Objectives
The objectives of this study were to collect information relating to key aspects of CAP training programmes in Europe in a systematic way in order to start a ‘Training Database’ that can be held centrally by the EFPT. Information will be added to the database every year following EFPT annual international meetings.
Aims
We aim to better understand the training structures in CAP across europe to help inform best practice standards for training.
Methods
A pro-forma word document was emailed to all EFPT CAP contacts: there were 20 contacts emailed.
Results
So far we have a response rate of over 60% and we are continuing to collect and collate relevant data. This survey highlighted a large variation in CAP training across Europe. It represents the basis for systematic data collection on an international level, and will help focus on areas where CAP training could be improved.
Conclusions
This survey highlights a large variation in CAP training across Europe. It represents the basis for systematic data collection on an international level, and will help focus on areas where CAP training could be improved.
Sleep disturbance is prominent in fibromyalgia (FM). This 14-week, randomized, double-blind, placebo-controlled study, evaluated the effect of pregabalin on pain and sleep-related outcomes in FM.
Methods:
Patients meeting ACR (FM) diagnostic criteria were randomized to pregabalin 300, 450, or 600mg/d (BID) or placebo for 14 weeks (A0081077). Primary efficacy parameter: LOCF endpoint mean pain score (MPS). At baseline and endpoint, patients completed the Medical Outcomes Sleep (MOS) Sleep Scale. Mean Sleep Quality scores (11-point numeric ratings) were derived from patient daily diaries.
Results:
745 randomized patients: 95% female, mean age=50 years, baseline MPS: 6.7. Placebo-corrected differences from baseline to endpoint in MPS were: 300mg/d, -0.71 (p=.0009); 450mg/d, -0.98 (p<.0001); 600mg/d, -1.00 (p<.0001). For MOS Sleep Disturbance, all 3 pregabalin groups demonstrated significant improvements versus placebo (300, 450, and 600 mg/d, -8.91 [p=.0006]; -10.63 [p<.0001]; and -14.93 [p<.0001], respectively). Similar improvements were seen in Sleep Quality (300, 450, and 600mg/d; 0.42, p=0.0030; 0.48, p=.0006; and 0.68, p<.0001 respectively) and MOS Sleep Adequacy (300, 450 and 600mg/d; 5.86, p=.0324; 7.89, p=.0036, and 11.16, p<.0001 respectively). Endpoint Mean Sleep Quality scores across all 3 treatment groups showed significant improvements (300, 450 and 600mg/d; -0.74, p=.0006, -1.12, and -1.35, both p<.0001 respectively). Most common AEs: dizziness (all pregabalin, 35.8% vs placebo, 7.6%); somnolence (18.0% vs 3.8%). Incidence of AEs appeared to be dose-related; most were mild to moderate.
Conclusions:
Pregabalin treatment demonstrated significant improvements in pain and patient reported measures of sleep disturbance, adequacy, and quality.
EFPT - The European Federation of Psychiatric Trainees is an independent federation of psychiatric trainees associations and its function is to provide a forum in which trainees can learn about the diversity of the current training of psychiatrists in Europe.
EFPT consists of several working groups that focus on supporting different fields (e.g. psychotherapy, child and adolescent psychiatry etc) and carry out various projects. The aim of CAP working group is firstly to represent CAP trainees and develop common recommendations regarding training while furthering links with organisations such as UEMS. In recent years the group has also recognised the need to collect information in order to assess the quality level of training in european countries, to recognise differences and build upon positives. In 2010–2011 this focused on training standards around Europe. In 2011–2012 we focus on:
A. The field of psychotherapy. The CAP group recognises that family relationships play a major role in the formation of a child's personality. The survey is being conducted in conjunction with the Psychotherapy WG within EFPT; thus training in this area in both adult psychiatry and CAP will be compared. Initial results will be presented at this symposium.
B. We believe that awareness of mental illness in the childhood should be an important part of the education in medical faculties. Therefore, we are keen to ascertain what placement opportunities in CAP are currently offered to medical students around Europe. Gathering information on this isT is our second aim for the next year.
Utilising routine surveillance data, this study presents a method for generating a baseline comparison that can be used in future foodborne outbreak investigations following a case–case methodology. Salmonella and Campylobacter cases (2012–2015) from Maricopa County, AZ were compared to determine differences in risk factors, symptoms and demographics. For foods and other risk factors, adjusted odds ratios were developed using Campylobacter as the reference. Comparisons were also made for three major Salmonella subtypes, Typhimurium, Enteritidis and Poona as compared with Campylobacter. Salmonella cases were younger, while Campylobacter cases were more Hispanic and female. Campylobacter cases reported consuming peppers, sprouts, poultry, queso fresco, eggs and raw nuts more and reported contact with animal products, birds, visiting a farm or dairy, owning a pet, a sick pet, swimming in a river, lake or pond, or handling multiple raw meats more. Salmonella cases reported visiting a petting zoo and contact with a reptile more. There were significant variations by Salmonella subtype in both foods and exposures. We recommend departments conduct this analysis to generate a baseline comparison and a running average of relevant odds ratios allowing staff to focus on trace-back of contaminated food items earlier in the outbreak investigation process.
Seven half-day regional listening sessions were held between December 2016 and April 2017 with groups of diverse stakeholders on the issues and potential solutions for herbicide-resistance management. The objective of the listening sessions was to connect with stakeholders and hear their challenges and recommendations for addressing herbicide resistance. The coordinating team hired Strategic Conservation Solutions, LLC, to facilitate all the sessions. They and the coordinating team used in-person meetings, teleconferences, and email to communicate and coordinate the activities leading up to each regional listening session. The agenda was the same across all sessions and included small-group discussions followed by reporting to the full group for discussion. The planning process was the same across all the sessions, although the selection of venue, time of day, and stakeholder participants differed to accommodate the differences among regions. The listening-session format required a great deal of work and flexibility on the part of the coordinating team and regional coordinators. Overall, the participant evaluations from the sessions were positive, with participants expressing appreciation that they were asked for their thoughts on the subject of herbicide resistance. This paper details the methods and processes used to conduct these regional listening sessions and provides an assessment of the strengths and limitations of those processes.
Herbicide resistance is ‘wicked’ in nature; therefore, results of the many educational efforts to encourage diversification of weed control practices in the United States have been mixed. It is clear that we do not sufficiently understand the totality of the grassroots obstacles, concerns, challenges, and specific solutions needed for varied crop production systems. Weed management issues and solutions vary with such variables as management styles, regions, cropping systems, and available or affordable technologies. Therefore, to help the weed science community better understand the needs and ideas of those directly dealing with herbicide resistance, seven half-day regional listening sessions were held across the United States between December 2016 and April 2017 with groups of diverse stakeholders on the issues and potential solutions for herbicide resistance management. The major goals of the sessions were to gain an understanding of stakeholders and their goals and concerns related to herbicide resistance management, to become familiar with regional differences, and to identify decision maker needs to address herbicide resistance. The messages shared by listening-session participants could be summarized by six themes: we need new herbicides; there is no need for more regulation; there is a need for more education, especially for others who were not present; diversity is hard; the agricultural economy makes it difficult to make changes; and we are aware of herbicide resistance but are managing it. The authors concluded that more work is needed to bring a community-wide, interdisciplinary approach to understanding the complexity of managing weeds within the context of the whole farm operation and for communicating the need to address herbicide resistance.
An updated compilation of published and new data of major-ion (Ca, Cl, K, Mg, Na, NO3, SO4) and methylsulfonate (MS) concentrations in snow from 520 Antarctic sites is provided by the national ITASE (International Trans-Antarctic Scientific Expedition) programmes of Australia, Brazil, China, Germany, Italy, Japan, Korea, New Zealand, Norway, the United Kingdom, the United States and the national Antarctic programme of Finland. The comparison shows that snow chemistry concentrations vary by up to four orders of magnitude across Antarctica and exhibit distinct geographical patterns. The Antarctic-wide comparison of glaciochemical records provides a unique opportunity to improve our understanding of the fundamental factors that ultimately control the chemistry of snow or ice samples. This paper aims to initiate data compilation and administration in order to provide a framework for facilitation of Antarctic-wide snow chemistry discussions across all ITASE nations and other contributing groups. The data are made available through the ITASE web page (http://www2.umaine.edu/itase/content/syngroups/snowchem.html) and will be updated with new data as they are provided. In addition, recommendations for future research efforts are summarized.
No existing models of alcohol prevention concurrently adopt universal and selective approaches. This study aims to evaluate the first combined universal and selective approach to alcohol prevention.
Method
A total of 26 Australian schools with 2190 students (mean age: 13.3 years) were randomized to receive: universal prevention (Climate Schools); selective prevention (Preventure); combined prevention (Climate Schools and Preventure; CAP); or health education as usual (control). Primary outcomes were alcohol use, binge drinking and alcohol-related harms at 6, 12 and 24 months.
Results
Climate, Preventure and CAP students demonstrated significantly lower growth in their likelihood to drink and binge drink, relative to controls over 24 months. Preventure students displayed significantly lower growth in their likelihood to experience alcohol harms, relative to controls. While adolescents in both the CAP and Climate groups demonstrated slower growth in drinking compared with adolescents in the control group over the 2-year study period, CAP adolescents demonstrated faster growth in drinking compared with Climate adolescents.
Conclusions
Findings support universal, selective and combined approaches to alcohol prevention. Particularly novel are the findings of no advantage of the combined approach over universal or selective prevention alone.
Most empirical studies into the covariance structure of psychopathology have been confined to adults. This work is not developmentally informed as the meaning, age-of-onset, persistence and expression of disorders differ across the lifespan. This study investigates the underlying structure of adolescent psychopathology and associations between the psychopathological dimensions and sex and personality risk profiles for substance misuse and mental health problems.
Method
This study analyzed data from 2175 adolescents aged 13.3 years. Five dimensional models were tested using confirmatory factor analysis and the external validity was examined using a multiple-indicators multiple-causes model.
Results
A modified bifactor model, with three correlated specific factors (internalizing, externalizing, thought disorder) and one general psychopathology factor, provided the best fit to the data. Females reported higher mean levels of internalizing, and males reported higher mean levels of externalizing. No significant sex differences emerged in liability to thought disorder or general psychopathology. Liability to internalizing, externalizing, thought disorder and general psychopathology was characterized by a number of differences in personality profiles.
Conclusions
This study is the first to identify a bifactor model including a specific thought disorder factor. The findings highlight the utility of transdiagnostic treatment approaches and the importance of restructuring psychopathology in an empirically based manner.
The prenatal hormonal milieu is widely believed to shape health later in life; however, there are considerable methodological challenges associated with measuring the in utero hormonal environment. Two potential biomarkers of prenatal androgen exposure that can be measured postnatally have been proposed: anogenital distance (AGD) and the ratio of the second to fourth digits of the hand (2D:4D). Although both measures are widely used research tools, their use in adult women may be complicated by the dramatic fluctuations in reproductive hormones across the menstrual cycle. To determine whether there is cyclical variation in these biomarkers, we conducted a longitudinal study of 12 naturally cycling, nulliparous adult women. Trained examiners assessed two measures of AGD [anus to clitoris (AGD-AC) and anus to fourchette (AGD-AF)] and 2D:4D in both hands for the duration of three menstrual cycles, taking measurements during the follicular, peri-ovulatory and luteal phases of each cycle. Despite the small sample size, longer (more masculine) AGD was associated with lower (more masculine) digit ratios, as predicted by the literature. Using multi-level linear regression models, we found that AGD and 2D:4D measurements did not differ significantly across cycle phases. AGD-AF and digit ratios in both hands were associated with age at menarche, suggesting a possible common developmental trajectory. These results demonstrate that AGD and 2D:4D are stable across the menstrual cycle. In addition, research is needed to determine how reliably these measures reflect the in utero hormonal milieu.