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Nevin Manimala Statistics

How Many Cores Should Be Sampled during Systematic Prostate Biopsy in Case of Negative Multiparametric Magnetic Resonance Imaging? Analysis of 274 Men with Clinical Suspicion of Prostate Cancer

Urol Int. 2021 Dec 20:1-6. doi: 10.1159/000520598. Online ahead of print.

ABSTRACT

INTRODUCTION: This study aimed to investigate the number of cores needed in a systematic biopsy (SB) in men with clinical suspicion of prostate cancer (PCa) but negative prebiopsy multiparametric magnetic resonance imaging and to test prostate-specific antigen (PSA) density as an indicator for reduced SB.

METHODS: Two hundred and seventy-four patients were analyzed, extracted from an institutional database. Detection rates of any PCa and clinically significant (CS) PCa for different reduced biopsy protocols were compared by using Fisher’s exact test.

RESULTS: In total, 12-core SB revealed PCa in 103 (37.6%) men. Detection rates of reduced biopsy protocols were 74 (27%, 6-core) and 82 (29.9%, 8-core). Regarding CSPCa, 12-core SB revealed a detection rate of 26 (9.5%). Reduced biopsy protocols detected less CSPCa: 15 (5.5%) and 18 (6.6%), respectively. All differences were statistically significant, p < 0.05. PSA density ≥0.15 did not help to filter out men in whom a reduced biopsy may be sufficient.

CONCLUSIONS: Twelve-core SB still has the highest detection rate of any PCa and CSPCa compared to reduced biopsy protocols. If the investigator and patient agree – based on individual risk calculation – to perform a biopsy, this SB should contain at least 12 cores regardless of PSA density.

PMID:34929699 | DOI:10.1159/000520598

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Nevin Manimala Statistics

Influence of socioeconomic status on the incidence of aneurysmal subarachnoid haemorrhage and clinical recovery

J Clin Neurosci. 2021 Dec 9;95:70-74. doi: 10.1016/j.jocn.2021.11.033. Online ahead of print.

ABSTRACT

BACKGROUND: The relevance of socioeconomic status (SES) on the incidence of aneurysmal subarachnoid haemorrhage (aSAH) and discharge functional outcomes following treatment is not clear.

METHODS: A retrospective cross-sectional study was performed on data retrieved from the Nationwide Hospital Morbidity Database for all aSAH cases in Australia between 2012 and 2018. Information on patient characteristics, procedures performed, discharge disposition and SES were extracted. SES data was derived from classifications by the Australian Bureau of Statistics. Putative risk factors were evaluated with univariate and multivariate logistic regression analysis to identify independent predictor of unfavourable discharge outcomes (defined as death or dependency).

RESULTS: A total of 3,591 low SES patients (49.8%) were identified in our study cohort. Average crude incidence of aSAH was persistently higher among the SES disadvantaged (6.6 cases per 100,000 person-years, 95% CI 6.3 – 6.8), compared to the SES advantaged group (4.1 cases per 100,000 person-years, 95% CI 4.0-4.2) (p < 0.0001). Patients in the Low SES group were more likely to be active smokers, have type 2 diabetes mellitus, or live in non-metropolitan residence, and have overall worse discharge functional outcomes (27.7% versus 24.5%, p = 0.0015). Adjusting for well-established risk factors such as older age, and intracranial bleed (ICH and/or IVH), disadvantaged SES remained a significant predictor of poor discharge outcome following aSAH (p = 0.0003).

CONCLUSION: aSAH occurs more frequently among low SES communities, and once ruptured, there is a greater risk of poor recovery..

PMID:34929654 | DOI:10.1016/j.jocn.2021.11.033

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Nevin Manimala Statistics

National trends in the surgical management of metastatic lung cancer to the spine using the national inpatient sample database from 2005 to 2014

J Clin Neurosci. 2021 Dec 9;95:88-93. doi: 10.1016/j.jocn.2021.11.036. Online ahead of print.

ABSTRACT

Optimal management of metastatic lung cancer to the spine (MLCS) incorporates a multidisciplinary approach. With improvements in lung cancer screening andnonsurgical treatment, the role for surgerymay be affected. The objective of this study is to assess trends in the surgical management of MLCS using the National Inpatient Sample (NIS) database. The NIS was queried for patients with MLCS who underwent surgery from 2005 to 2014. The frequencies of spinal decompression alone, spinal stabilization with or without (+/-) decompression, and vertebral augmentation were calculated. Statistical analysis was performed to analyze the effect of patient characteristics on outcomes. The most common procedure performed was vertebral augmentation (10719, 44.3%), followed by spinal stabilization +/- decompression (8634, 35.7%) and then decompression alone (4824, 20.0%). The total number of surgeries remained stable, while the rate of spinal stabilizations increased throughout the study period (p < 0.001). Invasive procedures such as stabilization and decompression were associated with greater costs, length of stay,complications and mortality. Increasingcomorbidity was associated with increased odds of complication, especially in patients undergoing more invasive procedures. In patients with lowpre-operative comorbidity, the type of procedure did not influence the odds of complication. Graded increases in length of stay, cost and mortality were seen with increasing complication rate.The rate of spinal stabilizations increased, which may be due to either increased early detection of disease facilitating use of outpatient vertebral augmentation procedures and/or the recognition that surgical decompression and stabilization are necessary for optimal outcome in the setting of MLCS with neurological deficit.

PMID:34929657 | DOI:10.1016/j.jocn.2021.11.036

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Nevin Manimala Statistics

Treatment of glioblastoma with re-purposed renin-angiotensin system modulators: Results of a phase I clinical trial

J Clin Neurosci. 2021 Dec 4;95:48-54. doi: 10.1016/j.jocn.2021.11.023. Online ahead of print.

ABSTRACT

Glioblastoma is the most common and most aggressive primary brain cancer in adults. Standard treatment of glioblastoma consisting of maximal safe resection, adjuvant radiotherapy and chemotherapy with temozolomide, results in an overall median survival of 14.6 months. The aggressive nature of glioblastoma has been attributed to the presence of glioblastoma stem cells which express components of the renin-angiotensin system (RAS). This phase I clinical trial investigated the tolerability and efficacy of a treatment targeting the RAS and its converging pathways in patients with glioblastoma. Patients who had relapsed following standard treatment of glioblastoma who met the trial criteria were commenced on dose-escalated oral RAS modulators (propranolol, aliskiren, cilazapril, celecoxib, curcumin with piperine, aspirin, and metformin). Of the 17 patients who were enrolled, ten completed full dose-escalation of the treatment. The overall median survival was 19.9 (95% CI:14.1-25.7) months. Serial FET-PET/CTs showed a reduction in both tumor volume and uptake in one patient, an increase in tumor uptake in nine patients with decreased (n = 1), unchanged (n = 1) and increased (n = 7) tumor volume, in the ten patients who had completed full dose-escalation of the treatment. Two patients experienced mild side effects and all patients had preservation of quality of life and performance status during the treatment. There is a trend towards increased survival by 5.3 months although it was not statistically significant. These encouraging results warrant further clinical trials on this potential novel, well-tolerated and cost-effective therapeutic option for patients with glioblastoma.

PMID:34929651 | DOI:10.1016/j.jocn.2021.11.023

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Prognostic factors influencing survival following re-resection for isocitrate dehydrogenase (IDH) -wildtype glioblastoma multiforme – Data from a national neuro-oncology registry

J Clin Neurosci. 2021 Dec 17;95:142-150. doi: 10.1016/j.jocn.2021.12.011. Online ahead of print.

ABSTRACT

The role of surgical resection in recurrent Glioblastoma Multiforme (GBM) remains unclear. We aimed to investigate survival outcomes and associated prognostic factors in patients undergoing surgical re-resection for recurrent IDH-wildtype GBM in a national neuro-oncology center. We evaluated all patients who underwent re-resection for recurrent GBM following adjuvant treatment between 2015 and 2018. 32 patients were eligible for inclusion. 19 (59%) were male,median age at re-resection was 53. Median time from initial surgery to re-resection was 13.5 months. Median overall survival (OS) was 28.6 months from initial surgery and 9.5 months from re-resection. MGMT methylation was significantly associated with improved OS from initial surgery, 40 months versus 19.1 months, (p = 0.004), and from re-resection, 9.47 months versus 6.93 months, (p = 0.028). A late re-resection was associated with improved OS compared to an early re-resection, 44.1 months versus 15.7 months, (p = 0.002). There was a trend for improved outcomes in younger patients, median OS from initial surgery 44.1 months for <53 years compared to 21.7 months for patients ≥53, (p = 0.099). Higher Karnofsky Performance Status (KPS) at re-resection was associated with improved median OS, 9.5 months versus 4.1 months for KPS ≥70 and <70 respectively, (p = 0.013). Furthermore, there was a trend for improved OS with greater extent of re-resection, however this did not reach statistical significance, possibly due to small sample size. Re-resection for recurrent GBM was associated with improved OS in those with good performance status and could be considered in carefully selected cases.

PMID:34929638 | DOI:10.1016/j.jocn.2021.12.011

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How Parkinson’s patients in the USA perceive deep brain stimulation in the 21st century: Results of a nationwide survey

J Clin Neurosci. 2021 Dec 3;95:20-26. doi: 10.1016/j.jocn.2021.11.017. Online ahead of print.

ABSTRACT

Research on attitudes regarding the use and timing of deep brain stimulation (DBS) has been mostly qualitative to this date. In this study, we aim to examine attitudes and perceptions about the use and timing of DBS in patients with Parkinson’s disease (PD) who have not had DBS. We designed an online survey comprising Likert-type, multiple choice, and rank-order questions and distributed it to PD patients. We recruited participants via flyers, the Michael J. Fox Foundation Trial Finder, and the Parkinson Alliance website. We analyzed considerations for choosing or rejecting DBS and when participants would consider such a decision to be premature. Data were analyzed using descriptive and inferential statistics, including a multinomial logistic regression model. Among the 285 participants who reported not having undergone DBS, the most frequent concerns were related to the efficacy of DBS and not having exhausted medication alternatives. DBS was viewed as less convenient, effective, and safe when PD symptoms were still manageable by medication. Our regression model suggests that having fewer concerns over technical problems was a positive predictor of preferring early DBS, while concerns over DBS interfering with friendships and relationships was a negative predictor. Our results suggest that patients with PD who have not undergone DBS have a wide variety of attitudes regarding DBS and its timing. Given the increasing number of therapeutic options for PD, future work should compare perceptions and preferences regarding different PD treatment modalities to provide the best counseling for patients regarding their therapeutic options.

PMID:34929646 | DOI:10.1016/j.jocn.2021.11.017

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Nevin Manimala Statistics

Effect of diabetes mellitus on pregnancy and birth outcomes in Wolaita Zone, Southern Ethiopia: A retrospective cohort study

Diabetes Metab Syndr. 2021 Dec 11;16(1):102364. doi: 10.1016/j.dsx.2021.102364. Online ahead of print.

ABSTRACT

BACKGROUND AND AIMS: Presence of diabetes mellitus (DM) during pregnancy is important cause of maternal and fetal complications. Studies that address the effect of DM on pregnancy and birth outcome are scarce in Ethiopia. The aim of this study was to determine the effect of DM on maternal and birth outcomes in Wolaita Zone, Southern Ethiopia.

METHODS: A retrospective cohort study was done to compare maternal and birth outcomes of mothers with DM and non-DM who received maternity service in three hospitals and four health centers in Southern Ethiopia. A total of 136 exposed (with DM) and 272 unexposed (non-DM) mothers were included in the study. Data were extracted from medical records of mothers by experienced and trained data collectors. Means were compared for continuous variables. Logistic regression analysis model was used to check the effect of DM on pregnancy and birth outcome. Risk Ratio was calculated and p value less than 0.05 was considered statistically significant.

RESULTS: Pregnancy of diabetic mothers was significantly complicated by pre-eclampsia when compared with non-diabetic mothers, (RR = 1.8: 95% CI; 1.2-2.7). The risk of macrosomia was higher for neonates of diabetic mothers than non-diabetic mothers, (RR = 1.9: 95% CI; 1.3-2.7). From multivariate analysis, mothers with DM were 2.9 times more likely to be delivered by caesarean section than non-diabetic mothers (RR = 2.9: 95%CI; 1.3-6.2) and the risk of pre-term delivery was 2.5 times higher among mothers with DM, (RR = 2.5: 95% CI; 1.1-6.2).

CONCLUSIONS: Diabetes mellitus among pregnant mothers is associated with increased risk of pre-term delivery, macrosomia and maternal complications of pre-eclampsia and caesarian delivery. Early detection and management of DM should be one of the key activities to improve maternal and child mortality and morbidity.

PMID:34929621 | DOI:10.1016/j.dsx.2021.102364

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The reliability of the Wagner Scale for evaluation the diabetic wounds: A literature review

Diabetes Metab Syndr. 2021 Dec 13;16(1):102369. doi: 10.1016/j.dsx.2021.102369. Online ahead of print.

ABSTRACT

BACKGROUND AND AIMS: Classification of wound severity is important in medical care decisions specially in diabetic patients. The Wagner Scale provides a structure to determine the severity of a wound by examining its depth and extent. The adequate reliability of this instrument, like other instruments for measuring health status, is important. So, the aim of this review is to report evidence on the reliability of the Wagner scale.

METHOD: A comprehensive search was performed in databases. Observational studies that assessed the reliability of the Wagner scale, with statistical measures, were included. Methodological quality of studies was evaluated with the COSMIN checklist. Finally, we report the reliability measurements, narratively.

RESULTS: We assessed 7 studies. In all studies 1873 subjects participated. Methodological quality was good only in one study. In two studies used of weighted kappa (Inter Observer Reliability) that reliability was in median level in both studies. The relation between Wagner score and amputation were report in two studies that measured by X2trend and regression analysis. In four measurements, reported the correlation between Wagner with ulcer healing by X2trend, Log Rank, Kaplan-Meier, and inter quartile range.

CONCLUSION: It can be confirmed that the reliability of the Wagner scale is appropriate and this tool is recommended to evaluate the severity of the wounds specially in diabetic patients. It should also be noted that the user of the scale must be trained. In future studies, it is recommended to use appropriate methodology and complete reports for the reliability of Wagner scale.

PMID:34929620 | DOI:10.1016/j.dsx.2021.102369

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Nevin Manimala Statistics

A Review of Incident Prediction, Resource Allocation, and Dispatch Models for Emergency Management

Accid Anal Prev. 2021 Dec 17;165:106501. doi: 10.1016/j.aap.2021.106501. Online ahead of print.

ABSTRACT

In the last fifty years, researchers have developed statistical, data-driven, analytical, and algorithmic approaches for designing and improving emergency response management (ERM) systems. The problem has been noted as inherently difficult and constitutes spatio-temporal decision making under uncertainty, which has been addressed in the literature with varying assumptions and approaches. This survey provides a detailed review of these approaches, focusing on the key challenges and issues regarding four sub-processes: (a) incident prediction, (b) incident detection, (c) resource allocation, and (c) computer-aided dispatch for emergency response. We highlight the strengths and weaknesses of prior work in this domain and explore the similarities and differences between different modeling paradigms. We conclude by illustrating open challenges and opportunities for future research in this complex domain.

PMID:34929574 | DOI:10.1016/j.aap.2021.106501

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Nevin Manimala Statistics

Immunohistochemical comparison of p63 and p40 in head and neck Spindle Cell Carcinoma

Pathol Res Pract. 2021 Dec 7;229:153733. doi: 10.1016/j.prp.2021.153733. Online ahead of print.

ABSTRACT

BACKGROUND: Spindle Cell Carcinoma (SpCC) is a rare type of squamous cell carcinoma (SCC) with prominent malignant spindle cell component. This unique biphasic feature on histopathological examination makes its diagnosis problematic. Detection of p63 antigens in SpCC can be helpful however its expression in variousb proliferating soft tissue lesions demands for better marker.

METHODS: In this study, histopathologically diagnosed SpCC of head and neck region were considered as cases, and 22 soft tissue sarcomas, reactive lesions and spindle cell lesions of the body were taken as controls. Immunohistochemistry (IHC) was done using Anti-p63 and p40 clone and the results were compared. CK was done for negative cases to prove their epithelial origin. P. value < 0.05 considered statistically significant.

RESULTS: Among 22 cases of SpCC, 19 cases showed positive immunoreactivity to p63, and 18 cases for p40. IHC of controls showed no immunoreactivity in any of the sarcomas, reactive lesions or spindle cell lesions. The sensitivity of p63 is 86% while that of p40 is 82%. Specificity of both the markers was 100% CONCLUSION: Though p63 is a slightly (4%) more sensitive marker than p40, percentage of cell positivity for p40 is higher compared to p63. Both of these markers are 100% specific for SpCC.

PMID:34929597 | DOI:10.1016/j.prp.2021.153733