Category: Statistics

J Gastrointest Cancer. 2021 Oct 3. doi: 10.1007/s12029-021-00723-w. Online ahead of print.

ABSTRACT

PURPOSE: Mortality from pancreatic cancer has risen fast in the past two decades in East Africa, including Kenya. However, there was a paucity of conclusive data about the survival of pancreatic cancer patients in the study setting. Hence, this study aimed to assess the survival outcomes of pancreatic cancer patients at Kenyatta National Hospital.

METHODS: A hospital-based retrospective cohort analysis was used to evaluate the survival outcomes among pancreatic cancer patients treated in the study setting from 1 January 2015 to 31 December 2019. A total of 64 eligible pancreatic cancer patients were included in the study. In the pre-designed data abstraction tool, the data were collected by reviewing the medical records of the patients. The data were analyzed using the Statistical Package for the Social Sciences version 22 software. The mean survival time was estimated using Kaplan-Meier survival analysis. Cox regression analysis was employed to estimate the predictors of mortality among pancreatic cancer patients.

RESULTS: The mean age of the study participants was 60.38 ± 12.61 years. Most of the patients had adenocarcinoma (96.9%) and were diagnosed at an advanced stage of the disease. The overall mean and median survival estimate for pancreatic cancer was 48.7 ± 9.7 and 39.0 ± 23.9 months, respectively. The present study showed that the overall survival rate of pancreatic cancer patients was 79.7%.

CONCLUSION: The mortality rate of pancreatic cancer in the present study was 20%. The overall mean survival estimate for pancreatic cancer was 48.7 ± 9.7 months, and the majority had disease progression in the last follow-up period.

PMID:34601708 | DOI:10.1007/s12029-021-00723-w

Int Urol Nephrol. 2021 Oct 3. doi: 10.1007/s11255-021-02999-0. Online ahead of print.

ABSTRACT

PURPOSE: It is a prospective randomized controlled trial comparing the efficacy of percutaneous tibial nerve stimulation versus sham for a shortened 6-week protocol of treatment in management of refractory OAB in non-neurogenic adult patients.

METHODS: A total of 50 adults with refractory non-neurogenic overactive bladder symptoms were randomized 1:1 to 6 weeks of treatment with weekly percutaneous tibial nerve stimulation or sham therapy. Overactive bladder symptom score as well as 3-day voiding diaries were completed at baseline and at 7th week, 3rd and 6th month.

RESULTS: The 7th week, 3rd and 6th month symptom score assessment for overall bladder symptoms demonstrated that percutaneous tibial nerve stimulation patients achieved statistically significant improvement in bladder symptoms with 52% reporting moderately improved responses compared to non-response of sham patients from baseline (P = 0.001). Voiding diary parameters after 6 weeks of therapy showed that PTNS patients had statistically significant improvements in frequency, voided volume and urgency urinary incontinence episodes compared to sham. No serious device-related adverse events or malfunctions were reported.

CONCLUSION: A shortened 6-week treatment protocol with PTNS appears to be successful and more effective than sham in the treatment of refractory OAB. PTNS therapy is safe and effective in treating OAB symptoms with 52% success rate following a shortened 6-week protocol. The duration of treatment with PTNS can be halved compared to the conventional 12 weeks, which would make it more acceptable and cost effective for patients.

PMID:34601705 | DOI:10.1007/s11255-021-02999-0

Ir J Med Sci. 2021 Oct 3. doi: 10.1007/s11845-021-02788-9. Online ahead of print.

ABSTRACT

BACKGROUND: International evidence indicates that about 10% of people with alcohol dependence will seek and commence treatment each year. Based upon Irish estimates of prevalence of dependence, a target of 690.0 treated cases per 100,000 population per annum is expected.

AIMS: This study analyses routine national surveillance data on alcohol treatment to measure how treatment need is being met.

METHODS: National treatment surveillance data on problem alcohol use collected by the National Drug Treatment Reporting System (NDTRS) were analysed. The study included cases resident in Ireland, aged 18-64 years entering treatment for alcohol use disorder (AUD) between 2015 and 2019 (n = 44,079). Treatment rates were calculated per 100,000 of the population. Descriptive and exploratory statistics were used to describe characteristics of cases treated.

RESULTS: National rate of treated AUD was 270 cases per 100,000 annually, with a rate of treated alcohol dependence of 165/100,000. There was a fivefold difference between the lowest and highest rates (119 cases per 100,000 in Meath versus 633 in Waterford). Drinking patterns indicate high levels of alcohol consumption and prolonged use prior to treatment. The use of other drugs alongside alcohol was common.

CONCLUSIONS: Despite high rates of alcohol consumption and dependence, the rate of treatment entry nationally is sub-optimal, although there are wide geographic variations. There is a need to better understand the reasons for low treatment entry rates in Ireland for people with alcohol dependence. Monitoring and surveillance play a key role in measuring the successful efforts to reduce the harm of alcohol.

PMID:34601707 | DOI:10.1007/s11845-021-02788-9

Environ Sci Pollut Res Int. 2021 Oct 3. doi: 10.1007/s11356-021-16562-y. Online ahead of print.

ABSTRACT

The circular economy (CE) is a proposal for a new, more sustainable, and durable economy model. As a consequence, this pro-environmental economic model induces visible changes in the labor market which are Green Jobs (GJs). This paper is focused on the creation of Green Jobs in the CE. The GJs are most visible in the environmental goods and services sector (EGSS). This study aims to investigate EGSS among 28 European Union countries in the years 2009-2019. The adopted method was literature research complemented by the statistical analysis of secondary data from Eurostat in the linear regression method. Then, some Sustainable Development Goals (SDGs) and their measure were used as main indicators reflecting changes in the labor market. Results are presented as a model indicating which of the SDGs can support CE and enhance a number of the Green Jobs. Presented results contribute to the science because combine factors influencing GJs creation in EGSS, in a CE perspective. This study underlines a lack of uniform methods for measuring and forecasting the effects of Green Jobs creation and indicates future research directions.

PMID:34601690 | DOI:10.1007/s11356-021-16562-y

Neurol Sci. 2021 Oct 2. doi: 10.1007/s10072-021-05636-x. Online ahead of print.

ABSTRACT

BACKGROUND: Up to 50% of motor neuron disease (MND) patients show neuropsychological deficits which negatively affect prognosis and care. However, disability-related logistical issues and uneven geographical coverage of healthcare services may prevent MND patients from accessing neuropsychological evaluations. This study thus aimed to standardize for the Italian population the ALS Cognitive Behavioral Screen-Phone Version (ALS-CBS™-PhV), an MND-specific, telephone-based screening for frontotemporal dysfunction.

METHODS: The cognitive section of the ALS-CBS™-PhV, the Italian telephone-based Mini-Mental State Examination (Itel-MMSE), and the Telephone Interview for Cognitive Status (TICS) was administered to 359 healthy individuals (143 males, 216 females; age, 52.7 ± 15.8; education, 13.1 ± 4.4). Norms were derived through equivalent scores. Validity, factorial structure, reliability, diagnostic accuracy, and item difficulty and discrimination were examined. Statistical equivalence between the telephone-based and in-person versions was tested.

RESULTS: ALS-CBS™-PhV measures were predicted by age and education. The ALS-CBS™-PhV reflected a mono-component structure, converged with Itel-MMSE and TICS scores (r_s = .23-.51) and was equivalent to its in-person format (t = .37; p = .72). Good internal (Cronbach’s α = .61), test-retest (ICC = .69), and inter-rater (ICC = .96) reliability was detected. High accuracy was found when tested against both the Itel-MMSE and the TICS (AUC = .82-89). Backward digit span items were the most discriminative.

DISCUSSION: The ALS-CBS™-PhV is a statistically solid screening test for frontotemporal disorders featuring MND. Its standardization allows for (1) improvements in tele-healthcare for MND patients, (2) epidemiological applications, and (3) effective assessments in decentralized clinical trials. The ALS-CBS™-PhV can be also suitable for assessing bedridden and visually impaired patients with motor disorders.

PMID:34601697 | DOI:10.1007/s10072-021-05636-x

Clin Rheumatol. 2021 Oct 3. doi: 10.1007/s10067-021-05947-6. Online ahead of print.

ABSTRACT

Instagram allows for graphical and visual information exchange. This paper aims to explore the current landscape of rheumatology on Instagram and analyse the accounts available based on their objectives and level of engagement. The search term “#rheumatology” reveals 62 results, leaving 55 after careful exclusion. On grouping into “educational”, “broadcasting”, “support”, and a combination of all three, an analysis is carried out using the total number of posts, follower counts, number of caption characters (last 10 posts), likes per post (last 10 posts), archived stories, reels, IgTV (Instagram Television) videos, hashtags, and links in bio. The analysis reveals that 29 accounts (52.7%) disseminate educational content, 36 (65.4%) are run by organisations, and 22 (40.0%) are of an institute or clinic. Character counts (rho 0.44, p = 0.0006) and videos (likes for ten posts 149 vs. 54, p = 0.006) positively correlate with the number of likes, while hashtag use and post count have no statistical significance with likes. Reels and IgTV videos are infrequently used (18.18%, 3.6%). The rheumatology social media landscape is in its nascency and currently split into educational and broadcasting accounts with a significant overlap between the two. The positive correlation of character counts and videos and the negative correlation of hashtag use and post count with likes lay the case for quality content to improve engagement. Social media editors may ensure quality content for rheumatology education using Instagram. Key Points • The current landscape of Instagram use in rheumatology is limited and largely orientated towards educative content. • Likes on Instagram are positively correlated with caption character counts and videos. • Using currently underutilised tools like videos, engaging captions, and infographics may enhance the utility of Instagram in rheumatology education.

PMID:34601652 | DOI:10.1007/s10067-021-05947-6

J Comput Neurosci. 2021 Oct 3. doi: 10.1007/s10827-021-00797-2. Online ahead of print.

ABSTRACT

Recurrent neural networks of spiking neurons can exhibit long lasting and even persistent activity. Such networks are often not robust and exhibit spike and firing rate statistics that are inconsistent with experimental observations. In order to overcome this problem most previous models had to assume that recurrent connections are dominated by slower NMDA type excitatory receptors. Usually, the single neurons within these networks are very simple leaky integrate and fire neurons or other low dimensional model neurons. However real neurons are much more complex, and exhibit a plethora of active conductances which are recruited both at the sub and supra threshold regimes. Here we show that by including a small number of additional active conductances we can produce recurrent networks that are both more robust and exhibit firing-rate statistics that are more consistent with experimental results. We show that this holds both for bi-stable recurrent networks, which are thought to underlie working memory and for slowly decaying networks which might underlie the estimation of interval timing. We also show that by including these conductances, such networks can be trained to using a simple learning rule to predict temporal intervals that are an order of magnitude larger than those that can be trained in networks of leaky integrate and fire neurons.

PMID:34601665 | DOI:10.1007/s10827-021-00797-2

Brain Imaging Behav. 2021 Oct 2. doi: 10.1007/s11682-021-00552-2. Online ahead of print.

ABSTRACT

Despite the high risk for suicide, relatively few studies have explored the relationship between suicide and brain imaging measures in bipolar disorder. In addition, fewer studies have explored the possibility that altered brain metabolism may be associated with suicide attempt. To begin to fill in these gaps, we evaluated functional (task based fMRI) and metabolic (quantitative T1ρ) differences associated with suicide attempt in participants with bipolar disorder. Thirty-nine participants with bipolar disorder underwent fMRI during a flashing checkerboard task and 27 also underwent quantitative T1ρ. The relationship between neuroimaging and history of suicide attempt was tested using multiple regression while adjusting for age, sex, and current mood state. Differences between two measures of suicide attempt (binary: yes/no and continuous: number of attempts) were quantified using the corrected Akaike Information Criterion. Participants who had attempted suicide had greater fMRI task-related activation in visual areas and the cerebellum. The number of suicide attempts was associated with a difference in BOLD response in the amygdala, prefrontal cortex, and cerebellum. Increased quantitative T1ρ was associated with number of suicide attempts in limbic, basal ganglia, and prefrontal cortex regions. This study is a secondary analysis with a modest sample size. Differences between measures of suicide history may be due to differences in statistical power. History of suicide was associated with limbic, prefrontal, and cerebellar alterations. Results comparing those with and without suicide attempts differed from results using number of suicide attempts, suggesting that these variables have different neurobiological underpinnings.

PMID:34601647 | DOI:10.1007/s11682-021-00552-2

Arch Orthop Trauma Surg. 2021 Oct 3. doi: 10.1007/s00402-021-04195-2. Online ahead of print.

ABSTRACT

INTRODUCTION: The aim of this prospective randomised study was to evaluate clinical results and rotational stability at least 2 years after single-bundle anatomic anterior cruciate ligament reconstruction using a quadriceps tendon graft with bone block (BT) and bone-patellar tendon-bone graft (BTB).

MATERIALS AND METHODS: In both groups (BT and BTB), 40 patients selected prospectively at random were evaluated. The mean follow-up after the surgery was 28 months (range 24-33 months). A navigation system was used to measure rotational stability of the knee joint. Cincinnati, Lysholm, and IKDC scores and visual analog score (VAS) were used to evaluate clinical results and the non-parametric Wilcoxon test was used for the statistical analysis.

RESULTS: After the BT reconstruction, the mean internal rotation of the tibia (IR) was 9.5°. In the contralateral healthy knee joint, IR was 8.6° at average. After the BTB reconstruction, the mean IR was 9.9°. In the contralateral healthy knee joint, IR was 8.7° at average. We did not find any statistically significant difference in IR stability between BT and BTB reconstruction. In terms of clinical results, regarding the VAS, patients perceive significantly more pain after the BTB reconstruction (p < 0.05). Kneeling was reported more difficult and painful after BTB reconstruction.

CONCLUSIONS: The BT reconstruction of the ACL provides similar clinical results, less pain, better flexion and the same rotational stability of the knee in comparison with the BTB reconstruction.

PMID:34601649 | DOI:10.1007/s00402-021-04195-2

Hum Reprod. 2021 Oct 3:deab198. doi: 10.1093/humrep/deab198. Online ahead of print.

ABSTRACT

STUDY QUESTION: What were the utilization, effectiveness and safety of practices in assisted reproductive technologies (ART) globally in 2014 and what global trends could be observed?

SUMMARY ANSWER: The estimated total number of ART cycles conducted in 76 participating countries in 2014 was 1.93 million representing ∼66% of global activity, with 5-year trends including an increase in success rates and proportion of frozen embryo transfer (FET) cycles, improvement in cumulative live birth rates per aspiration, a continued increase in single embryo transfer (SET) and thus a reduction in multiple birth rates, an increase in preimplantation genetic testing and stabilization in the use of intracytoplasmic sperm injection (ICSI).

WHAT IS KNOWN ALREADY: ART is widely practiced throughout the world but continues to be characterized by significant disparities in utilization, practice, effectiveness and safety. The International Committee for Monitoring Assisted Reproductive Technologies (ICMART) annual world report series provides an important instrument for tracking trends in ART treatment and for providing clinical and public health data to ART professionals, health authorities, patients and the general public.

STUDY DESIGN, SIZE, DURATION: A retrospective, cross-sectional survey on ART procedures performed globally during 2014 was carried out. A new method for calculating ART utilization rates and number of babies born was introduced in this latest ICMART world report.

PARTICIPANTS/MATERIALS, SETTING, METHODS: Overall, 76 countries and 2 746 ART centres submitted data through national and regional ART registries on ART cycles performed during 2014 and their treatment and pregnancy outcomes. ART cycles and outcomes are described at a country level, regionally and globally. Aggregate country data are processed and analyzed based on methods developed by ICMART.

MAIN RESULTS AND THE ROLE OF CHANCE: A total of 1 629 179 ART cycles were reported for the treatment year 2014. After imputing data for missing values and non-reporting centres in reporting countries, an estimated 1 929 905 cycles resulted in >439 039 babies in reporting countries. From 2010 to 2014, the number of reported non-donor aspirations and FET cycles increased by 37.3% and 67.5%, respectively. The proportion of women aged ≥40 years undergoing non-donor ART increased from 23.2% in 2010 to 27.0% in 2014. ICSI, as a percentage of non-donor aspiration cycles, remained relatively stable at 64.8%. The IVF/ICSI combined delivery rates per fresh aspiration and FET cycle were 19.9% and 24.3%, respectively. In fresh non-donor cycles, SET increased from 30.0% in 2010 to 40.0% in 2014, while the average number of transferred embryos decreased from 1.95 to 1.73-but with wide country variation. The rate of twin deliveries following fresh non-donor transfers continued to decrease, from 20.4% in 2010 to 16.2% in 2014, and the triplet rate decreased from 1.1% to 0.5%. In FET non-donor cycles in 2014, the SET rate was 61.6%, with an average of 1.43 embryos transferred, resulting in twin and triplet rates of 10.1% and 0.2%, respectively. The cumulative delivery rate per aspiration increased from 27.1% in 2010 to 32.1% in 2014. The overall perinatal mortality rate per 1 000 births was 19.4 following fresh IVF/ICSI cycles and 9.5 following FET cycles. Among reporting countries, oocyte donation cycles represented 7.3% of all embryo transfers (89 751 transfer cycles) and resulted in 39 278 babies.

LIMITATIONS, REASONS FOR CAUTION: The data presented are dependent on the quality and completeness of data submitted by individual countries to ICMART directly or through regional registries. This report covers approximately two-thirds of world ART activity. China is a major contributor of global cycles missing from this report. Continued efforts to improve the quality and consistency of ART data reported by registries are still needed, including the use of internationally agreed standard definitions (The International Glossary of Infertility and Fertility Care). A new method was introduced in this report to calculate ART utilization and number of babies born following ART; therefore, these results are not directly comparable with previous reports.

WIDER IMPLICATIONS OF THE FINDINGS: The ICMART world reports provide the most comprehensive global statistical census and review of ART utilization, effectiveness, safety and quality. While ART treatment effectiveness and safety continue to increase globally, the wide disparities in access to treatment, procedures performed and embryo transfer practices warrant attention by clinicians and policymakers. The new method for estimating ART utilization and number of babies born provided more conservative estimates compared to the previuos method.

STUDY FUNDING/COMPETING INTEREST(S): ICMART receives unrestricted grants from Abbott and Ferring Pharmaceuticals. ICMART also acknowledges financial support from the following organizations: American Society for Reproductive Medicine; Asia Pacific Initiative on Reproduction; European Society of Human Reproduction and Embryology; Fertility Society of Australia and New Zealand; Japan Society for Reproductive Medicine; Japan Society of Fertilization and Implantation; Red Latinoamericana de Reproducción Asistida; and the Society for Assisted Reproductive Technology. S.D. reports industry sponsorship for attendance of conference from Ferring, and research grants to support African Network and Registry of ART from Ferring and Merck outside the submitted work. F.Z.-H. reports lectures at organized webinars for Ferring and Merck. O.I. reports honoraria for consulting from Ferring, Merck and ObsEva, as well as honoraria for lectures from Ferring and Merck. G.M.C., J.d.M., M.B., M.S.K. and G.D.A. have nothing to disclose.

TRIAL REGISTRATION NUMBER: N/A.

PMID:34601605 | DOI:10.1093/humrep/deab198