Tag: statistics

Integr Environ Assess Manag. 2021 Sep 28. doi: 10.1002/ieam.4525. Online ahead of print.

ABSTRACT

Trace elements like copper and zinc are supplemented in swine feeds to suppress bacteria and/or promote growth. Due to the low absorption rates, trace elements are greatly concentrated in swine feces, posing a potential risk to soil environment and human health if applied to agricultural fields. In the present study, the concentrations of six trace elements (Cu, Zn, As, Cd, Pb, and Cr) in pig feed and feces were evaluated by sample analysis and gathering data from literature. The feed-to-feces and feces-to-compost enrichment factors of the trace elements were determined to back-calculate safe concentrations in feed needed to meet permissible trace element concentrations in organic fertilizer. The Cu and Zn concentrations in feeds were highest, being statistically significantly higher in starter pig feeds than in grower-finisher feeds. Copper exceeded feed limits mainly in the feeds of finisher pigs and sows, while exceedance for Zn occurred in almost all feed samples. Concentrations above the limits were also observed for Pb and Cr impurities in mineral feed supplements. The highest Cu and Zn concentrations in feces were observed for starter pigs. Moreover, significant enrichment of trace elements from feeds to feces was found, with enrichment factors determined of 4.68-6.11 for Cu, 3.43-4.60 for Zn, 2.30-3.12 for As, 2.89-4.63 for Cd, 2.45-5.00 for Pb, and 3.32-5.00 for Cr, respectively. On this basis, the recommended calculated limits for Cu, Zn, As, Cd, Pb, and Cr in the feeds for different ages of pigs were 41-53, 130-175, 2-3, 0.3-0.5, 5-10, and 15-23 mg/kg, respectively. Priority index calculations and the calculated recommended limits for feeds indicated that Cu in starter pig feeds and Cd in starter and breeding pig feeds should be prioritized for reduction to enable feces composts to be utilised safely in agricultural land amendment. This article is protected by copyright. All rights reserved.

PMID:34581489 | DOI:10.1002/ieam.4525

Cardiol J. 2021 Sep 28. doi: 10.5603/CJ.a2021.0109. Online ahead of print.

ABSTRACT

BACKGROUND: Several scoring systems have been developed in order to predict percutaneous coronary intervention (PCI) result of chronic total occlusion (CTO). The scores principally include anatomic and clinical variables. Operator experience is a decisive factor for achieving successful result. We sought to assess the real impact of operator growing experience on CTO-PCI success.

METHODS: The angiographic and clinical variables of CTO-PCIs performed in our center between May 2007 and April 2021 were collected, and variables with potential association with procedural result were thoroughly reviewed. The influence of operator experience based on the number of previous CTO-PCIs was statistically assessed. A scoring system with combination of anatomic variables and operator experience was devised.

RESULTS: A total of 540 PCIs in 457 patients were performed in our institution. The scoring model was developed from the derivation set (2/3 of the cohort). The final variables in logistic regression model were CTO length ≥ 20 mm, blunt stump, vessel tortuosity > 45o and operator experience < 100 PCIs. The model showed good performance in the derivation set (area under curve [AUC]: 0.768; confidence interval [CI]: 0706-0.830; p < 0.001) with no significant shrinkage in the validation set (AUC: 0.704; CI: 0.613-0.796; p < 0.001).

CONCLUSIONS: This new score (E-CTO score) adequately predict the probability of CTO-PCI failure. The model includes a variable representing operator experience along with other anatomic variables.

PMID:34581426 | DOI:10.5603/CJ.a2021.0109

Cardiol J. 2021 Sep 28. doi: 10.5603/CJ.a2021.0108. Online ahead of print.

ABSTRACT

BACKGROUND: Myocardial reperfusion is the main target of treatment in patients with ST-segment elevation myocardial infarction (STEMI). The intracoronary administration of cangrelor bolus could favor a higher local drug concentration, favoring an earlier thrombotic resolution and a reduced distal micro-embolization.

METHODS: Seventy-one patients undergoing primary percutaneous coronary intervention (PCI) for STEMI: 37 treated with intracoronary and 34 with intravenous bolus administration of cangrelor. The primary endpoint was ST-elevation reduction (STR) ≥ 50% after 30 min from the end of the PCI. Other explorative reperfusion indices investigated were: STR ≥ 50% at 24 hours, STR ≥ 70% at 30 min, Thrombolysis In Myocardial Infarction frame count and the QT dispersion (QTd). Moreover, acute and subacute stent thrombosis, bleeding events and 30-day mortality have been evaluated.

RESULTS: More frequent STR ≥ 50% was observed in the intravenous cangrelor bolus group as compared to the intracoronary administration at 30 min (71.9% vs. 45.5%; p = 0.033), the difference was maintained 24 hours after PCI (87.1% vs. 63.6%; p = 0.030). STR ≥ 70% at 30 min was statistically more frequent in the intravenous bolus administration cohort (66.7% vs. 28.6% p = 0.02). At multivariable analysis, intravenous cangrelor administration was significantly related to STR ≥ 50% (odds ratio: 3.586; 95% confidence interval: 1.134-11.335; p = 0.030). The incidence of Bleeding Academic Research Consortium 3-5 bleedings was 15.5% and mortality was 4.2% without any significant difference between the two groups.

CONCLUSIONS: In conclusion the results of the study do not show any advantages in the administration of intracoronary bolus of cangrelor in patients affected by STEMI and treated with primary PCI.

PMID:34581427 | DOI:10.5603/CJ.a2021.0108

Cornea. 2021 Sep 29. doi: 10.1097/ICO.0000000000002837. Online ahead of print.

ABSTRACT

PURPOSE: The aim of this study was to demonstrate the safety and effectiveness of a single TearCare procedure compared with a single LipiFlow procedure in treatment of the dry eye disease associated with meibomian gland dysfunction.

METHODS: In a multicenter, masked, randomized controlled trial, 135 subjects received a single TearCare (TC) treatment (n = 67) or a single LipiFlow (LF) treatment (n = 68) at baseline and were followed up for 1 month posttreatment. Tear film breakup time, meibomian gland function, and corneal and conjunctival staining scores were assessed as dry eye signs at baseline, 2 weeks, and 1 month; dry eye symptoms were assessed using the Ocular Surface Disease Index, Symptom Assessment in Dry Eye, and eye dryness questionnaires at baseline and 1 month.

RESULTS: At 1 month posttreatment, both groups demonstrated significant improvements (P < 0.0001) in mean tear film breakup time and meibomian gland secretion score to 3.0 ± 4.4 and 11.2 ± 11.1 in the TC group and 2.6 ± 3.3 and 11.0 ± 10.4 in the LF group, respectively. The mean eye dryness, Symptom Assessment in Dry Eye, and Ocular Surface Disease Index scores were significantly reduced (P < 0.0001) by 35.4 ± 34.1, 38.2 ± 31.0, and 27.9 ± 20.5 in the TC group and 34.9 ± 26.9, 38.0 ± 25.9, and 23.4 ± 17.7 in the LF group, respectively. There were no statistically significant differences for any result between the groups. However, the TC group demonstrated numerically greater improvements consistently in all signs and symptoms. Device-related ocular adverse events were reported in 3 patients in the TC group (superficial punctate keratitis, chalazion, and blepharitis) and 4 patients in the LF group (blepharitis, 2 cases of foreign body sensation, and severe eye dryness).

CONCLUSIONS: A single TearCare treatment significantly alleviates the signs and symptoms of dry eye disease in patients with meibomian gland dysfunction and is equivalent in its safety and effectiveness profile to LipiFlow treatment as shown in this 1-month follow-up study.

PMID:34581297 | DOI:10.1097/ICO.0000000000002837

Anal Methods. 2021 Sep 28. doi: 10.1039/d1ay01163d. Online ahead of print.

ABSTRACT

Exhaled breath analysis is an interesting and promising approach for the diagnostics of various diseases. Being non-invasive, convenient and simple, this approach has tremendous potential utility for further translation into clinical practice. In this study, gas chromatography-mass spectrometry (GC-MS) and quartz microbalance sensor-based “electronic nose” were applied for analysis of the exhaled breath of 40 lung cancer patients and 40 healthy individuals. It was found that the electronic nose was unable to distinguish the samples of different groups. However, the application of GC-MS allowed identifying statistically significant differences in compound peak areas and their ratios for investigated groups. Diagnostic models were created using random forest classifier based on peak areas and their ratios with the sensitivity and specificity of peak areas (ratios) of 85.7-96.5% (75.0-93.1%) and 73.3-85.1% (90.0-92.5%) on training data and 63.6-75.0% (72.7-100.0%) and 50.0-69.2% (76.9-84.6%) on test data, respectively. The exhaled breath samples of lung cancer patients and healthy volunteers could be distinguished by GC-MS with the use of individual compounds, but application of their ratios could help to determine specific differences between investigated groups and the level the influence of individual metabolism features alternating from one person to another as well as daily instrument reproducibility deviations. The electronic nose has to be significantly improved to apply it to lung cancer diagnostics of exhaled breath analysis and the influence of water vapour has to be lowered to increase the sensitivity of the sensors to detect lung cancer biomarkers.

PMID:34581316 | DOI:10.1039/d1ay01163d

ASAIO J. 2021 Sep 24. doi: 10.1097/MAT.0000000000001582. Online ahead of print.

ABSTRACT

Anticoagulation management in pediatric extracorporeal membrane oxygenation (ECMO) is challenging with multiple laboratory measures utilized across institutions without consensus guidelines. These include partial thromboplastin time (PTT), thromboelastography (TEG), and antifactor Xa (aXa). We aimed to evaluate the consistency of TEG R-time, PTT, and aXa correlation to bivalirudin and heparin dosing. We conducted a single-center restrospective review of pediatric ECMO cases from 2018 to 2020 anticoagulated with bivalirudin or heparin. We collected up to 14 serial simultaneous TEG R-time, PTT, and aXa measurements over a 7 day ECMO course with corresponding bivalirudin or heparin dosing. We analyzed the correlation between bivalirudin, heparin, and the three measurements of anticoagulation. A total of 67 ECMO runs, 32 bivalirudin, and 35 heparin, and more than 1,500 laboratory values, of which >80% simultaneous, were analyzed. When assessing correlations at the individual patient level, there was no consistent correlation between dosing and at least one laboratory parameter in the majority of patients. Furthermore, 44% of the bivalirudin cohort and 37% of the heparin cohort exhibited no correlation with any parameters. There were statistically significant correlations only between bivalirudin and heparin dosing and the sum total of the different laboratory tests. These inconsistencies highlight the importance of multimodality testing of anticoagulation in the management of pediatric ECMO anticoagulation and cannot be relied on in isolation from bedside clinical judgment.

PMID:34581287 | DOI:10.1097/MAT.0000000000001582

Neurol Res. 2021 Sep 28:1-10. doi: 10.1080/01616412.2021.1975226. Online ahead of print.

ABSTRACT

INTRODUCTION: Peripheral nerve traumas are common injuries in young adult population. The myriad of techniques and medications have been defined to obtain better recovery but none of them was proved to have superior effect. This study aims to determine the anti-fibrotic effect of the decorin on sciatic nerve injury in order to enhance functional outcome.

MATERIALS AND METHODS: 24 12-week-old male Sprague-Dawley rats (350-400 gr) were divided into four groups. The sciatic nerve was dissected and exposed; a full-thickness laceration was created 1.5 cm proximal to the bifurcation point and 1.5 cm distal to where it originated from the lumbosacral plexus. Motor and sensory tests were conducted before and after the operations for evaluating the nerve healing.

RESULTS: There was a statistically significant difference between DCN bolus and PBS bolus group. (p<0.0001, p&lt;0.05) in neuromotor tests. Increase of the latency was significantly lower in DCN bolus and infusion group when compared with the PBS bolus group. (p&lt;0,001). All operated gastrocnemius muscles were atrophic compared with the contralateral side. The differences between the averages in the sciatic functional index, the improvement of the DCN infusion group was 8.6 units better than the PBS group and 4.4 units better than the DCN bolus group. When the amount of stimulation was 10 mV at the proximal segment in electromyography, there was no significant difference between the DCN bolus and sham groups. (p&gt; 0.05, p = 0.6623).

CONCLUSION: Decorin protein reduces the fibrosis and enhances the motor and sensory recovery both clinically and histologically. Despite the high cost, short half-life and production issues, this protein could be administered after the microsurgical repair but more studies are required to overcome the limitations.

PMID:34581256 | DOI:10.1080/01616412.2021.1975226

Ir J Psychol Med. 2021 Sep 28:1-8. doi: 10.1017/ipm.2021.63. Online ahead of print.

ABSTRACT

OBJECTIVES: Cyberbullying is increasingly recognised as a threat for young people’s mental health. Young people and their families may not know how to stay safe online or how to respond following unsafe internet experiences. This study aimed to examine Child and Adolescent Mental Health Service (CAMHS) staff perceived knowledge, practice and attitudes towards cyberbullying (CB) and internet safety (IS), and their training needs.

METHODS: A descriptive, survey design was used. 59 CAMHS clinicians completed a study specific online survey examining their knowledge, practice, attitudes and training needs regarding CB and IS. Frequency and descriptive statistics were conducted on participant responses.

RESULTS: Clinicians reported that risky internet behaviour and CB were frequent experiences reported by youth attending their clinical practice. Professionals were aware of potential adverse effects on the young person, including social withdrawal, low self-esteem, anxiety, self-injurious behaviour and suicidal thoughts. Training for young people on online behaviour and good digital citizenship skills was a highly endorsed preference. The majority of respondents felt CAMHS staff have a role in supporting families and managing IS and identified training and resource materials as strategies to assist them in this regard.

CONCLUSIONS: Findings support a need for clinicians to regularly inquire about internet use, safety and adverse online experiences. The ongoing development of resources and training in CB and IS for CAMHS clinicians, children and caregivers is necessary. Further research is warranted due to the small sample size and the subjective nature of the current study.

PMID:34581261 | DOI:10.1017/ipm.2021.63

J Obstet Gynaecol. 2021 Sep 28:1-8. doi: 10.1080/01443615.2021.1945017. Online ahead of print.

ABSTRACT

We sought to determine the prevalence of female sexual dysfunction (FSD) and to examine the influence of age, menopausal state and quality of life (QoL) on the female sexual function (FSF) of healthy women and those with benign gynaecological disease. With this purpose, we conducted a cross-sectional study, based on self-report questionnaires (sociodemographic, WHOQOL-BREF and FSFI), enrolling 107 women. Some 51.6% (n = 55) were diagnosed with FSD. We found no statistical significant differences between grouped reason for consultation and FSFI total score (p = .72) and its domains (p > .05). The results showed a negative strong correlation between age and FSFI total score (S= -0.71) and a positive moderate correlation between WHOQOL-BREF and FSFI total scores (S = 0.39). We observed statistically significant differences between menopausal state and FSFI total score (p = .001). In conclusion, the prevalence of FSD in our population was 51.6%. Our study results reveal that a reduction in FSFI scores has a negative impact on QoL and vice versa, regardless of the reason for consultation. Elderly age and postmenopausal state have deleterious effects on FSF.Impact statementWhat is already known on this subject? Poor QoL can adversely affect FSF and vice versa. The study of FSF is relatively recent and there is controversy regarding the deleterious effects of elderly age and menopause on FSF. The prevalence of FSD is difficult to precisely determine, given the studies’ use of different definitions for FSD and the highly heterogeneous study populations, as well as the types of tests and questionnaires employed. Sexual difficulties are problems seldom discussed between patients and their physicians. Lack of time, misconceptions, shame and frustration, considering sexuality as too intimate to discuss in the doctor’s office, uncertainty regarding therapeutic options and insufficient training of health professionals are just some of the reasons mentioned for not addressing sexual dysfunction in a general consultation.What do the results of this study add? Our study is the first research in Spain on the impact of age, menopause and QoL on gynaecological patients´ FSF. Our results indicate that an impaired FSF could be related to poorer well-being and QoL; however, benign gynaecological disease does not appear to affect FSF. Elderly age and postmenopausal state can have deleterious effects on FSF.What are the implications of these findings for clinical practice and/or further research? Sexuality is an important aspect of QoL. Therefore, gynaecologists should discuss issues of sexuality with their patients in routine visits, especially in case of elderly and postmenopausal women. In addition, gynaecologists should train in the diagnosis and treatment of the female sexual dysfunction.

PMID:34581247 | DOI:10.1080/01443615.2021.1945017

J Sports Sci. 2021 Sep 28:1-10. doi: 10.1080/02640414.2021.1982516. Online ahead of print.

ABSTRACT

This study investigated the effect of crank length on biomechanical parameters and muscle activity during standing cycling. Ten participants performed submaximal cycling trials on a stand-up bicycle using four crank lengths. Joint angles, moments, powers, and works of the lower limbs were calculated from motion data and pedal reaction forces. Electromyographic (EMG) data were recorded from gluteus maximus (GM), vastus medialis, rectus femoris, biceps femoris (BF), gastrocnemius medialis, soleus, and tibialis anterior, and used to obtain the integrated EMG. Statistical parametric mapping was employed to analyse the biomechanical parameters throughout the pedalling cycle. Knee and hip flexion angles and hip power increased at the initiation (0-20%) of pedalling with increasing crank length, while the BF and GM muscle activities increased during propulsion (20-40%). Additionally, increasing the crank length resulted in increased knee power absorption during upstroke phase (70-100%). Peak knee extension moment increased with decreasing crank length during propulsion, but the moment at a short crank length during propulsion was comparable to fast walking. Consequently, longer crank lengths require increased propulsion power by the lower limb muscles during standing cycling compared to shorter crank lengths. Therefore, shorter crank lengths are recommended for stand-up bicycles to avoid fatigue.

PMID:34581253 | DOI:10.1080/02640414.2021.1982516