The archaeome in metaorganism research, with a focus on marine models and their bacteria-archaea interactions.

Metaorganism research contributes substantially to our understanding of the interaction between microbes and their hosts, as well as their co-evolution. Most research is currently focused on the bacterial community, while archaea often remain at the sidelines of metaorganism-related research. Here, we describe the archaeome of a total of eleven classical and emerging multicellular model organisms across the phylogenetic tree of life. To determine the microbial community composition of each host, we utilized a combination of archaea and bacteria-specific 16S rRNA gene amplicons. Members of the two prokaryotic domains were described regarding their community composition, diversity, and richness in each multicellular host. Moreover, association with specific hosts and possible interaction partners between the bacterial and archaeal communities were determined for the marine models. Our data show that the archaeome in marine hosts predominantly consists of Nitrosopumilaceae and Nanoarchaeota, which represent keystone taxa among the porifera. The presence of an archaeome in the terrestrial hosts varies substantially. With respect to abundant archaeal taxa, they harbor a higher proportion of methanoarchaea over the aquatic environment. We find that the archaeal community is much less diverse than its bacterial counterpart. Archaeal amplicon sequence variants are usually host-specific, suggesting adaptation through co-evolution with the host. While bacterial richness was higher in the aquatic than the terrestrial hosts, a significant difference in diversity and richness between these groups could not be observed in the archaeal dataset. Our data show a large proportion of unclassifiable archaeal taxa, highlighting the need for improved cultivation efforts and expanded databases.

PREhabilitation of CAndidates for REnal Transplantation (PreCareTx) study: protocol for a hybrid type I, mixed method, randomised controlled trial.

INTRODUCTION: Kidney transplant candidates (KTCs) need to be in optimal physical and psychological condition prior to surgery. However, KTCs often experience compromised functional capacity which can be characterised as frailty. Prehabilitation, the enhancement of a person's functional capacity, may be an effective intervention to improve the health status of KTCs. The PREhabilitation of CAndidates for REnal Transplantation (PreCareTx) study aims to examine the effectiveness of a multimodal prehabilitation programme on the health status of KTCs, and to explore the potential of implementation of prehabilitation in daily clinical practice. METHODS AND ANALYSIS: This study uses a single centre, effectiveness-implementation hybrid type I study design, comprised of a randomised controlled trial and a mixed-methods study. Adult patients who are currently on the transplant waiting list or are waitlisted during the study period, at a university medical centre in The Netherlands, will be randomly assigned to either prehabilitation (n=64) or care as usual (n=64) groups. The prehabilitation group will undergo a 12-week home-based, tailored prehabilitation programme consisting of physical and/or nutritional and/or psychosocial interventions depending on the participant's deficits. This programme will be followed by a 12-week maintenance programme in order to enhance the incorporation of the interventions into daily life. The primary endpoint of this study is a change in frailty status as a proxy for health status. Secondary endpoints include changes in physical fitness, nutritional status, psychological well-being, quality of life and clinical outcomes. Tertiary endpoints include the safety, feasibility and acceptability of the prehabilitation programme, and the barriers and facilitators for further implementation. ETHICS AND DISSEMINATION: Medical ethical approval was granted by the Medical Ethics Committee Groningen, Netherlands (M22.421). Written informed consent will be obtained from all participants. The results will be disseminated at international conferences and in peer-reviewed journals. TRIAL REGISTRATION NUMBER: ClinicalTrials.gov, NCT05489432.

First Steps towards a near Real-Time Modelling System of Vibrio vulnificus in the Baltic Sea.

Over the last two decades, Vibrio vulnificus infections have emerged as an increasingly serious public health threat along the German Baltic coast. To manage related risks, near real-time (NRT) modelling of V. vulnificus quantities has often been proposed. Such models require spatially explicit input data, for example, from remote sensing or numerical model products. We tested if data from a hydrodynamic, a meteorological, and a biogeochemical model are suitable as input for an NRT model system by coupling it with field samples and assessing the models' ability to capture known ecological parameters of V. vulnificus. We also identify the most important predictors for V. vulnificus in the Baltic Sea by leveraging the St. Nicolas House Analysis. Using a 27-year time series of sea surface temperature, we have investigated trends of V. vulnificus season length, which pinpoint hotspots mainly in the east of our study region. Our results underline the importance of water temperature and salinity on V. vulnificus abundance but also highlight the potential of air temperature, oxygen, and precipitation to serve as predictors in a statistical model, albeit their relationship with V. vulnificus may not be causal. The evaluated models cannot be used in an NRT model system due to data availability constraints, but promising alternatives are presented. The results provide a valuable basis for a future NRT model for V. vulnificus in the Baltic Sea.

Poor Parental Supervision Associated With Traumatic Brain Injury and Reactive Aggression in Young Offenders.

OBJECTIVE: To establish whether poor parental supervision is associated with head injury and self-reported reactive aggression (ie, aggression in response to perceived provocation or threat) in adolescents in a Young Offender's Institute, by examining correlations between these variables. Understanding this population is important, as they are at a key pivotal age for intervention to prevent lifelong reoffending. METHODS: Ninety-six male participants aged 16 to 18 years were recruited from a UK Young Offender's Institute. Self-report measures of remembered parenting, reactive aggression, and head injury history were administered during individual interviews. RESULTS: Seventy-four percent of participants reported having experienced a lifetime traumatic brain injury (TBI), and 46% of participants reported experiencing at least 1 TBI leading to a loss of consciousness (LOC). We found that poor parental supervision, length of LOC following TBI, and self-reported reactive aggression were all positively correlated. CONCLUSIONS: Findings show that there are correlational relationships between poor parental supervision, length of LOC following lifetime TBI, and higher levels of self-reported reactive aggression. This suggests there may be pathways resulting from poor parental supervision leading to both TBI with LOC, and reactive aggression. We advocate for future research with longitudinal designs and larger samples to examine the nature of these interactions, and to establish whether poor parental supervision is a prospective risk factor for more TBIs leading to LOC, and reactive aggression. This is key to understanding whether parenting interventions could help to reduce the disabling effects of TBI in adolescents, and help to prevent contact with the law.

Hemorrhaging laparoscopic partial nephrectomy - feasibility of a novel simulation model.

INTRODUCTION: Intraoperative surgical complications pose significant potential risks to patients. Uncontrolled bleeding during laparoscopic partial nephrectomy is one such event that requires collaboration and communication between surgical team members. We developed and evaluated a multidisciplinary surgical simulation scenario and model of intraoperative hemorrhage during a laparoscopic partial nephrectomy to facilitate the practice of these crucial non-technical skills. METHODS: A simulation scenario using a novel, titratable, bleeding partial nephrectomy model was developed. The operating room simulation consisted of an intubated mannequin placed in the lateral decubitus position and laparoscopic renal model. The multidisciplinary simulation scenario included anesthesia and urology residents and progressed from bleeding to a pulseless electrical activity arrest. The degree of renal model bleeding was modified based on the progression of the urology resident. After the scenario, participants were debriefed and completed a post-simulation survey assessing: 1) their perception of the simulated scenario; and 2) their teaching of non-technical skills in their residency training. RESULTS: The porcine model was successfully reproduced for nine consecutive weeks and functioned well to simulate bleeding from a laparoscopic partial nephrectomy site; the bleeding was able to be titrated based on resident progression and excision of the simulated tumor. All residents stated the scenario was valuable to assess and improve non-technical surgical skills and that their exposure to practice non-technical skills in their existing curriculum could be improved. CONCLUSIONS: Simulating an intraoperative bleeding partial nephrectomy, combined with an intraoperative crisis scenario, is a feasible, immersive, and reproducible model and can challenge residents' non-technical skills.

Pontibacillus sp. ALD_SL1 and Psychroflexus sp. ALD_RP9, two novel moderately halophilic bacteria isolated from sediment and water from the Aldabra Atoll, Seychelles.

Pontibacillus sp. ALD_SL1 and Psychroflexus sp. ALD_RP9 are two novel bacterial isolates from mangrove sediment and a moderately hypersaline pool on the Aldabra Atoll, Seychelles. The isolates represent two novel species were characterised physiologically and genomically. Pontibacillus sp. ALD_SL1 is a facultatively anaerobic yellow, motile, rod-shaped Gram-positive, which grows optimally at a NaCl concentration of 11%, pH 7 and 28°C. It is the third facultatively anaerobic member of the genus Pontibacillus. The organism gains energy through the fermentation of pyruvate to acetate and ethanol under anaerobic conditions. The genome is the first among Pontibacillus that harbours a megaplasmid. Psychroflexus sp. ALD_RP9 is an aerobic heterotroph, which can generate energy by employing bacteriorhodopsins. It forms Gram-negative, orange, non-motile rods. The strain grows optimally at NaCl concentrations of 10%, pH 6.5-8 and 20°C. The Psychroflexus isolate tolerated pH conditions up to 10.5, which is the highest pH tolerance currently recorded for the genus. Psychroflexus sp. ALD_RP9 taxonomically belongs to the clade with the smallest genomes. Both isolates show extensive adaptations to their saline environments yet utilise different mechanisms to ensure survival.

Anesthetic technique and oncological outcomes in urology: A clinical practice review.

INTRODUCTION: There is increasing awareness that different anesthetic and analgesic techniques may impact outcomes after oncological surgery, generally through modifying effects on the immune system but potentially via other mechanisms including mitigating the surgical stress response. This narrative review aims to summarize the mechanisms underlying the effect of perioperative factors on oncological outcomes, with an emphasis on the available urologic literature. METHODS: Literature on anesthetic technique (i.e., general vs. regional) and oncological outcomes were reviewed with a particular focus on urological studies. RESULTS: In prostate cancer surgery, the risk of mortality has been reported to be reduced with the use of regional (i.e., neuraxial) anesthesia, but there was no association between anesthetic technique and progression-free or biochemical recurrence-free survival. In nonmuscle invasive bladder cancer, regional anesthesia has been associated with lower recurrence rates and longer time to recurrence following transurethral resection of bladder tumor. CONCLUSIONS: This review highlights the role of regional anesthesia to improve oncoimmunological responses after surgery, potentially through decreased use of volatile anesthetics and opioids, decreased activation of the surgical stress response, and a direct local anesthetic-mediated anti-inflammatory effect. Available urological literature suggests an association of anesthetic type and outcomes for nonmuscle invasive bladder cancer and prostate cancer surgeries but the evidence is limited. Prospective studies are needed to further investigate the relationship between anesthetic technique and urologic oncological outcomes.

Informing the development of online weight management interventions: a qualitative investigation of primary care patient perceptions.

BACKGROUND: The internet is a potentially promising medium for delivering weight loss interventions. The current study sought to explore factors that might influence primary care patients' initial uptake and continued use (up to four-weeks) of such programmes to help inform the development of novel, or refinement of existing, weight management interventions. METHODS: Semi-structured interviews were conducted with 20 patients purposively sampled based on age, gender and BMI from a single rural general practice. The interviews were conducted 4 weeks after recruitment at the general practice and focused on experiences with using one of three freely available weight loss websites. Thematic Analysis was used to analyse the data. RESULTS: Findings suggested that patients were initially motivated to engage with internet-based weight loss programmes by their accessibility and novelty. However, continued use was influenced by substantial facilitators and barriers, such as time and effort involved, reaction to prompts/reminders, and usefulness of information. Facilitation by face-to-face consultations with the GP was reported to be helpful in supporting change. CONCLUSIONS: Although primary care patients may not be ready yet to solely depend on online interventions for weight loss, their willingness to use them shows potential for use alongside face-to-face weight management advice or intervention. Recommendations to minimise barriers to engagement are provided.

Obstetric fistula in Niger: 6-month postoperative follow-up of 384 patients from the Danja Fistula Center.

INTRODUCTION AND HYPOTHESIS: The impoverished West African country of Niger has high rates of obstetric fistula. We report a 6-month postoperative follow-up of 384 patients from the Danja Fistula Center and assess factors associated with operative success or failure. METHODS: The medical records of 384 women who had completed a 6-month follow-up after fistula surgery were reviewed. Cases were categorized as "easy," "of intermediate complexity," or "difficult" based on a preoperative points system. Data were analyzed using simple chi-squared statistics and logistic regression. RESULTS: The patients were predominantly of Hausa ethnicity (73%), married young (average 15.9 years), had teenage first pregnancies (average first delivery 16.9 years), and experienced prolonged labor (average 2.3 days) with poor outcomes (89% stillbirth rate). The average parity was four. Patients commonly developed their fistula during their first delivery (43.5%), but over half sustained a fistula during a subsequent delivery (56.5%). Prior fistula surgery elsewhere (average 1.75 operations) was common. The overall surgical success ("closed and dry") was 54%. When the 134 primary operations were analyzed separately, the overall success rate was 80%. Increasing success was seen with decreasing surgical difficulty: 92% success for "easy" cases, 68% for "intermediate" cases, and 57% success for "difficult" cases. Success decreased with increasing numbers of previous attempts at surgical repair. CONCLUSIONS: These data provide further evidence that clinical outcomes are better when primary fistula repair is performed by expert surgeons in specialist centers with the support of trained fistula nurses.

The Biogeographical Distribution of Benthic Roseobacter Group Members along a Pacific Transect Is Structured by Nutrient Availability within the Sediments and Primary Production in Different Oceanic Provinces.

By now, only limited information on the Roseobacter group thriving at the seafloor is available. Hence, the current study was conducted to determine their abundance and diversity within Pacific sediments along the 180° meridian. We hypothesize a distinct biogeographical distribution of benthic members of the Roseobacter group linked to nutrient availability within the sediments and productivity of the water column. Lowest cell numbers were counted at the edge of the south Pacific gyre and within the north Pacific gyre followed by an increase to the north with maximum values in the highly productive Bering Sea. Specific quantification of the Roseobacter group revealed on average a relative abundance of 1.7 and 6.3% as determined by catalyzed reported deposition-fluorescence in situ hybridization (CARD-FISH) and quantitative PCR (qPCR), respectively. Corresponding Illumina tag sequencing of 16S rRNA genes and 16S rRNA transcripts showed different compositions containing on average 0.7 and 0.9% Roseobacter-affiliated OTUs of the DNA- and RNA-based communities. These OTUs were mainly assigned to uncultured members of the Roseobacter group. Among those with cultured representatives, Sedimentitalea and Sulfitobacter made up the largest proportions. The different oceanic provinces with low nutrient content such as both ocean gyres were characterized by specific communities of the Roseobacter group, distinct from those of the more productive Pacific subarctic region and the Bering Sea. However, linking the community structure to specific metabolic processes at the seafloor is hampered by the dominance of so-far uncultured members of the Roseobacter group, indicating a diversity that has yet to be explored.

Delays and interruptions in the acute medical unit clerking process: an observational study.

OBJECTIVES: It is recommended that patients are seen within 4 h of arrival in Acute Medical Units in English hospitals. This study explored the frequency and nature of interruptions and delays potentially affecting the duration of the Acute Medical Unit admission process and the quality of care provided. DESIGN: The admission process was directly observed for patients admitted to the Acute Medical Unit over four one-week periods, November 2009 to April 2011. SETTING: UK teaching hospital Acute Medical Unit. PARTICIPANTS: Hospital staff n = 36. MAIN OUTCOME MEASURES: Patient waiting times, duration of clerking, number of interruptions and/or delays. RESULTS: Thirty-five doctors and one nurse practitioner were observed admitting 71 medical patients, 48/71 (68%) patients were clerked within 4 h of arrival. A delay and/or interruption affected 49/71 (69%) patients. Sixty-six interruptions were observed in 36/71 (51%) of admissions, of these 19/36 (53%) were interrupted more than once. The grade of doctor had no bearing on the frequency of interruption; however, clerking took significantly longer when interrupted; overall doctors grade ST1 and above were quicker at clerking than foundation doctors. Delays affected 31/71 (44%) of admissions, 14/31 (45%) involved X-rays or ECGs; other causes of delays included problems with equipment and computers. CONCLUSION: Interruptions and delays regularly occurred during the admission process in the study hospital which impacts adversely on patient experience and compliance with the recommended 4-h timeframe, further work is required to assess the impact on patient safety. Data obtained from this observational study were used to guide operational changes to improve the process.

Adjusting to living with multiple sclerosis: The role of social groups.

Multiple sclerosis (MS) is typically associated with life-long adjustment to wide-ranging, changeable symptoms and psychosocial disruption as all relationships are changed or lost. Despite accumulating evidence, the therapeutic impact of harnessing social group factors in MS management and rehabilitation remains largely unexplored. We investigated their role specific to adjusting to MS. A qualitative approach was used with thematic analysis to induce a rich and developing account of the impact of social groups on adjustment for 15 individuals with MS. An adjustment questionnaire was used to provide a framework for its organisation and discussion. The analysis revealed three themes associated with loss, change and social processes that influenced adjustment. These features distinguished between those who were more or less able to adjust, and resonated well with processes previously identified as central to identity loss and change. Social factors enhanced adjustment through easing transition between pre- and post-MS diagnosis lives. Notably, maintenance of pre-existing social roles and relationships was critical in providing a meaningful basis for integrating the old with new senses of self. The capacity to join new social groups was as key in adjustment as was awareness of having access to multiple social groups to avoid being solely defined by MS. These concepts provided a more stable grounding upon which to nurture value systems and employ collective support to counter the negative consequences of living with MS.

Evaluation of a cervicography-based program to ensure quality of visual inspection of the cervix in HIV-infected women in Johannesburg, South Africa.

OBJECTIVE: To determine whether a quality assurance (QA) program using digital cervicography improved the performance of a visual inspection with acetic acid (VIA) to detect cervical intraepithelial neoplasia grade 2 or worse (CIN 2+) in HIV-infected women in Johannesburg, South Africa. MATERIALS AND METHODS: Visual inspection with acetic acid was performed among HIV-infected women, aged 18 to 65 years, in Johannesburg, South Africa. Nurses received 2 weeks of training on the VIA procedure. The VIA interpretation was performed in real time. The VIA results were then photographed using a retail available digital camera. A gynecologist and medical officer reviewed the VIA digital images within 2 weeks of the procedure. Colposcopic biopsy was performed on all women with positive VIA and 25% negative VIA results. Sensitivity and specificity of VIA for the detection of CIN 2+ were compared between the nurses and physicians at the beginning and at the end of the study. RESULTS: Positive VIA results were found in 541 (45%) of the 1,202 participating women. The sensitivity of VIA to predict CIN 2+ was improved from 65% to 75% (p = .001) with the addition of digital cervicography and specialist review. There was no statistical difference in the sensitivity of the VIA readings when comparing the first 600 participants to the final 593 participants between the nurses (p = .613) and physicians (p = .624). CONCLUSIONS: Quality assurance performed by specialists using digital cervicography improved the sensitivity of VIA. There was no difference in sensitivity in interpreting VIA between the beginning and the end of the study. Quality assurance should form a cornerstone of any VIA program to improve sensitivity in detecting CIN 2+ lesions.

A review of safety, side-effects and subjective reactions to intranasal oxytocin in human research.

BACKGROUND: Human research investigating the impact of intranasal oxytocin on psychological processes has accelerated over the last two decades. No review of side effects, subjective reactions and safety is available. METHOD: A systematic review of 38 randomised controlled trials conducted between 1990 and 2010 that investigated the central effects of intranasal oxytocin was undertaken. A systematic search for reports of adverse reactions involving intranasal oxytocin was also completed. RESULTS: Since 1990, research trials have reported on N=1529 (79% male) of which 8% were participants with developmental or mental health difficulties. Dosages ranged from 18 to 40 IU, mainly in single doses but ranged up to 182 administrations. Diverse methods have been used to screen and exclude participants, monitor side effects and subject reactions. Side effects are not different between oxytocin and placebo and participants are unable to accurately report on whether they have received oxytocin and placebo. Three case reports of adverse reactions due to misuse and longer-term use of intranasal oxytocin were reported. CONCLUSIONS: The evidence shows that intranasal oxytocin: (1) produces no detectable subjective changes in recipients, (2) produces no reliable side-effects, and (3) is not associated with adverse outcomes when delivered in doses of 18-40 IU for short term use in controlled research settings. Future research directions should include a focus on the dosage and duration of use, and application with younger age groups, vulnerable populations, and with females.

Supervisors' responses to sickness certification for an episode of low back pain: employees' personal experiences.

PURPOSE: To understand how work supervisors respond to sickness certification for an episode of low back pain based on employees' reports of employer-employee interactions. METHOD: Thematic analysis of semi-structured in-depth interviews with 16 employees who were currently or had recently been off work with an episode of low back pain. RESULTS: Two types of initial supervisor response were identified: See you later and take your time and get it right. Both of these relied on the employee returning to work once they were able to do their normal work tasks. Three types of subsequent response were identified: proactive, apathetic and negative. Only the proactive response included actions to encourage and assist the employee to return to the workplace. CONCLUSIONS: The interactions described by participants suggest that employers and their representatives often postpone actioning to return to work interventions which potentially delays the rehabilitation of the employee.

Associations between authoritative parenting and the sun exposure and sun protective behaviours of adolescents and their friends.

Associations between the sun exposure and sun protective behaviours of adolescents and their friends were examined along with the role played by authoritative parenting and other family and peer socialisation factors. Four hundred and two adolescents (198 males, 204 females) participated in the research. It was found that these adolescents and their friends shared similar sun exposure and sun protective behaviours and had similar parenting backgrounds. Parental authoritativeness was positively associated with the use of sun protection, even after the effects of other familial and peer variables were controlled, but not with the time spent sunbathing which was associated with friends' behaviours. The theoretical and practical implications of these findings are discussed.

Does the doctor or the patient control sick leave certification? A qualitative study interpreting patients' interview dialogue.

BACKGROUND: Sickness certification poses challenges and problems for the GP. Patient factors may influence the sick leave period. OBJECTIVE: To explore how sickness certification occurred based on patients' reports of medical consultations for a new episode of low back pain. METHODS: A qualitative study using semi-structured interviews with 16 employees who were currently or had recently been off work with an episode of low back pain. RESULTS: We present a preliminary typology of sickness certification responses by medical practitioners comprising four response types: 'process', 'cued', 'consultative' and 'laissez-faire'. All but the process response allows the patient some influence in the sickness certification decision. It is possible that certain types of response may occur at specific stages of recovery. CONCLUSIONS: Doctors may allow patients input into the sickness certification process for a number of reasons. As yet, we do not know if this helps or hinders the return to work process.

Self-reported traumatic brain injury in male young offenders: a risk factor for re-offending, poor mental health and violence?

Adolescence is a risk period for offending and for traumatic brain injury (TBI) and TBI is a risk factor for poor mental health and for offending. TBI has been largely neglected from guidance on managing the mental health needs of young offenders. We sought to determine the rate of self-reported TBI, of various severities, in a male, adolescent youth offending population. We also aimed to explore whether TBI was associated with number of convictions, violent offending, mental health problems and drug misuse. Young male offenders aged 11 to 19 years were recruited from a Young Offender Institute, a Youth Offending Team and a special needs school. A total of 197 participants were approached and 186 (94.4%) completed the study. They completed self-reports on TBI, crime history, mental health and drug use. TBI with loss of consciousness (LOC) was reported by 46% of the sample. LOC consistent with mild TBI was reported by 29.6%, and 16.6% reported LOC consistent with moderate to severe TBI. Possible TBI was reported by a further 19.1%. Repeat injury was common - with 32% reporting more than one LOC. Frequency of self-reported TBI was associated with more convictions. Three or more self-reported TBIs were associated with greater violence in offences. Those with self-reported TBI were also at risk of greater mental health problems and of misuse of cannabis. TBI may be associated with offending behaviour and worse mental health outcomes. Addressing TBI within adolescent offenders with neurorehabilitative input may be important for improving well-being and reducing re-offending.

Traumatic brain injury in a prison population: prevalence and risk for re-offending.

BACKGROUND: TBI can lead to cognitive, behavioural and emotional difficulties. Previous studies suggest that TBI is relatively elevated in offender populations. In this study the aims were to establish the rate of TBI of various severities in a representative sample of adult offenders and patterns of custody associated with TBI. METHODS: A self-report survey of adult, male offenders within a prison. Of 453 offenders, 196 (43%) responded. RESULTS: Over 60% reported 'Head Injuries'. Reports consistent with TBI of various severities were given by 65%. Of the overall sample, 16% had experienced moderate-to-severe TBI and 48% mild TBI. Adults with TBI were younger at entry into custodial systems and reported higher rates of repeat offending. They also reported greater time, in the past 5 years, spent in prison. CONCLUSIONS: These findings indicate that there is a need to account for TBI in the assessment and management of offenders.

Comparison of a three-quarter electrode band configuration with a full electrode band configuration for impedance cardiography.

Impedance cardiography is a technique commonly used in psychophysiological studies. However, concerns about the utility of full circumferential band electrodes (FB) have been raised. The current study was designed to compare FB with a three-quarter circumferential band configuration (PB). A total of 47 participants (66% female, mean [SD] age=20.4 [3.0] years) underwent 2 testing sessions, once using FB and once using PB. Session order was randomized and balanced. Each session consisted of 5 min of rest, math task, recovery, and cold pressor test. Average baseline and task pre-ejection period (PEP), stroke volume (SV), cardiac output (CO), heart rate (HR), blood pressure (BP), and total peripheral resistance (TPR) was calculated from impedance cardiography and blood pressure monitoring. Participants were are asked to rate measures of comfort after each session. There were no significant difference between the mean levels of PEP, SV, CO, HR, and TPR for the PB versus the FB configurations. However, both systolic BP and diastolic BP were higher during the FB session. Intraclass correlations were high (r(icc) =.63-.93) between PB and FB. Bland-Altman analyses revealed a low level of bias (≤5%) between the configurations. Based on limits of agreement between ±30%, there was equivalence in PEP between the 2 configurations, and SV, CO, and TPR were close to reaching equivalence. Participants clearly indicated greater comfort with the PB configuration compared to the FB. The current study provides incremental evidence that suggests a three-quarter PB configuration may be utilized for standard psychophysiological testing instead of the standard FB configuration. However, further studies are needed to validate the PB configuration against other techniques.