Dataset Information

Association between biomarkers and clinical characteristics in chronic subdural hematoma patients assessed with lasso regression.

ABSTRACT: Chronic subdural hematoma (CSDH) is characterized by an "old" encapsulated collection of blood and blood breakdown products between the brain and its outermost covering (the dura). Recognized risk factors for development of CSDH are head injury, old age and using anticoagulation medication, but its underlying pathophysiological processes are still unclear. It is assumed that a complex local process of interrelated mechanisms including inflammation, neomembrane formation, angiogenesis and fibrinolysis could be related to its development and propagation. However, the association between the biomarkers of inflammation and angiogenesis, and the clinical and radiological characteristics of CSDH patients, need further investigation. The high number of biomarkers compared to the number of observations, the correlation between biomarkers, missing data and skewed distributions may limit the usefulness of classical statistical methods. We therefore explored lasso regression to assess the association between 30 biomarkers of inflammation and angiogenesis at the site of lesions, and selected clinical and radiological characteristics in a cohort of 93 patients. Lasso regression performs both variable selection and regularization to improve the predictive accuracy and interpretability of the statistical model. The results from the lasso regression showed analysis exhibited lack of robust statistical association between the biomarkers in hematoma fluid with age, gender, brain infarct, neurological deficiencies and volume of hematoma. However, there were associations between several of the biomarkers with postoperative recurrence requiring reoperation. The statistical analysis with lasso regression supported previous findings that the immunological characteristics of CSDH are local. The relationship between biomarkers, the radiological appearance of lesions and recurrence requiring reoperation have been inclusive using classical statistical methods on these data, but lasso regression revealed an association with inflammatory and angiogenic biomarkers in hematoma fluid. We thus suggest that lasso regression should be a recommended statistical method in research on biological processes in CSDH patients.

SUBMITTER: Pripp AH

PROVIDER: S-EPMC5673201 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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Association between biomarkers and clinical characteristics in chronic subdural hematoma patients assessed with lasso regression.

Pripp Are Hugo AH Stanišić Milo M

PloS one 20171106 11

Chronic subdural hematoma (CSDH) is characterized by an "old" encapsulated collection of blood and blood breakdown products between the brain and its outermost covering (the dura). Recognized risk factors for development of CSDH are head injury, old age and using anticoagulation medication, but its underlying pathophysiological processes are still unclear. It is assumed that a complex local process of interrelated mechanisms including inflammation, neomembrane formation, angiogenesis and fibrino ...[more]

PMID: 29107999

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Project description:Background: Several pharmacological treatments have been used to treat patients with chronic subdural hematoma (CSDH), although little is known about the comparative effectiveness of different classes of medication. We performed a Bayesian network meta-analysis to compare and rank the efficacy and safety of five drug regimens to determine the best treatment for this group of patients. Methods: We systematically searched PubMed, Medline, clinicaltrials.gov, the Cochrane database, and Embase to identify relevant randomized clinical trials (RCTs) comparing drug treatments in adult patients with CSDH. A network meta-analysis was conducted using a Bayesian framework. Random- and fixed-effects models were used to pool the network results, and the preferred model was selected by comparing the deviance information criteria (DIC). Efficacy outcomes included recurrence requiring surgery, changes in hematoma volume, and a good recovery. The safety outcomes were treatment-related adverse events and all-cause mortality. Results: In this Bayesian network meta-analysis, available data were obtained from 12 eligible trials, including 2,098 patients and 5 techniques. Compared to placebo, atorvastatin (RR: 0.45, 95% CrI: 0.24-0.81) and dexamethasone (RR: 0.38, 95% CrI: 0.22-0.63) were similarly effective in reducing recurrence requiring surgery by 55% and 62%, respectively. Dexamethasone (RR: 0.46, 95% CrI: 0.23-0.91) was more effective in reducing recurrence requiring surgery than goreisan. Additionally, atorvastatin reduced the hematoma volume to a greater extent than placebo (MD: -7.44, 95% CrI: -9.49 to -5.43) or goreisan (MD: -14.09, 95% CrI: -23.35 to -4.82). Moreover, tranexamic acid (MD: -12.07, 95% CrI: -21.68 to -2.29) reduced the hematoma volume to a greater extent than goreisan. No significant differences were detected between drugs and placebo with regard to a good recovery. In terms of safety, dexamethasone (RR: 1.96, 95% CrI: 1.20-3.28) increased the risk of mortality compared to placebo. Conclusion: These findings suggest that dexamethasone is the best treatment to reduce recurrence and atorvastatin is the best treatment to reduce hematoma volume in patients with CSDH. However, clinicians should pay close attention to the elevated risk of all-cause mortality and potential adverse events caused by dexamethasone. Future well-designed RCTs with more participants are needed to verify these findings. Clinical Trial Registration: http://osf.io/u9hqp.

Project description:BackgroundBurr hole evacuation is a well-established treatment for symptomatic cases with chronic subdural hematoma (cSDH). Routinely postoperative catheter is left in the subdural space to drain the residual blood. Drainage obstruction is commonly seen, and it can be related to suboptimal treatment.MethodsTwo groups of patients submitted to cSDH surgery were evaluated in a retrospective non-randomized trial, one group that had conventional subdural drainage (CD group, n = 20) and another group that used an anti-thrombotic catheter (AT group, n = 14). We compared the obstruction rate, amount of drainage and complications. Statistical analyses were done using SPSS (v.28.0).ResultsFor AT and CD groups respectively (median ± IQR), the age was 68.23 ± 26.0 and 70.94 ± 21.5 (p > 0.05); preoperative hematoma width was 18.3 ± 11.0 mm and 20.7 ± 11.7 mm and midline shift was 13.0 ± 9.2 and 5.2 ± 8.0 mm (p = 0.49). Postoperative hematoma width was 12.7 ± 9.2 mm and 10.8 ± 9.0 mm (p < 0.001 intra-groups compared to preoperative) and MLS was 5.2 ± 8.0 mm and 1.5 ± 4.3 mm (p < 0.05 intra-groups). There were no complications related to the procedure including infection, bleed worsening and edema. No proximal obstruction was observed on the AT, but 8/20 (40%) presented proximal obstruction on the CD group (p = 0.006). Daily drainage rates and length of drainage were higher in AT compared to CD: 4.0 ± 1.25 days vs. 3.0 ± 1.0 days (p < 0.001) and 69.86 ± 106.54 vs. 35.00 ± 59.67 mL/day (p = 0.074). Symptomatic recurrence demanding surgery occurred in two patients of CD group (10%) and none in AT group (p = 0.230), after adjusting for MMA embolization, there was still no difference between groups (p = 0.121).ConclusionThe anti-thrombotic catheter for cSDH drainage presented significant less proximal obstruction than the conventional one and higher daily drainage rates. Both methods demonstrated to safe and effective for draining cSDH.

Project description:Importance:Women giving birth have high rates of dural puncture secondary to neuraxial anesthesia and are at high risk for a resulting headache. It appears to be unknown whether there is a significant association between post-dural puncture headache and subsequent intracranial subdural hematoma. Objective:To determine the association of post-dural puncture headache with postpartum intracranial subdural hematoma. Design, Setting, and Participants:This cohort study of patients used hospital discharges recorded in the US Agency for Healthcare Research and Quality National Readmission Database for women who experienced childbirth from January 2010 to December 2016. Patients were included if they had been admitted for childbirth, had 2 months of follow-up data, and did not receive a diagnostic lumbar puncture. Only the first delivery for a calendar year was studied. Data were analyzed from January 2018 to June 2019. Exposures:Women with post-dural puncture headache associated with neuraxial anesthesia in the 2-month postpartum period were identified using International Classification of Disease (Ninth Edition and Tenth Edition) codes and were compared with those without post-dural puncture headaches. Main Outcome and Measures:The primary outcome was intracranial subdural hematoma in the 2-month postpartum period. Secondary outcomes included in-hospital mortality and occurrence of neurosurgery. Results:A total of 26?469?771 patients with 26?498?194 deliveries were included. Exclusion of repeated deliveries (n?=?28?423), deliveries without 2 months of follow-up data (n?=?4?329?621), and deliveries with diagnostic lumbar puncture (n?=?9334) resulted in a final cohort of 22?130?815 patients and deliveries. For the cohort, the mean (SD) age was 28.1 (6.0) years, and there were 68?374 post-dural puncture headaches, for an overall rate of 309 (95% CI, 302-316) per 100?000. There were 342 cases of subdural hematoma identified, indicating a rate of 1.5 (95% CI, 1.3-1.8) per 100?000 women. Of these, 100 cases were in women with post-dural puncture headache, indicating a rate of 147 (95% CI, 111-194) hematoma cases per 100?000 deliveries in this subgroup. Post-dural puncture headache had an unadjusted absolute risk increase of 145 (95% CI, 117-174) subdural hematoma cases per 100?000 deliveries. After adjusting for confounders, post-dural puncture headache had an odds ratio for subdural hematoma of 199 (95% CI, 126-317; P?<?.001) and an adjusted absolute risk increase of 130 (95% CI, 90-169; P?<?.001) per 100?000 deliveries. Conclusions and Relevance:The presence of presumed post-dural puncture headache after neuraxial anesthesia in childbirth, compared with no headache, was associated with a small but statistically significant absolute increase in the risk of being diagnosed with intracranial subdural hematoma. Further research is needed to establish if this association is causal for this rare outcome.

Project description:BackgroundSeveral prognostic models for outcomes after chronic subdural hematoma (CSDH) treatment have been published in recent years. However, these models are not sufficiently validated for use in daily clinical practice. We aimed to assess the performance of existing prediction models for outcomes in patients diagnosed with CSDH.MethodsWe systematically searched relevant literature databases up to February 2021 to identify prognostic models for outcome prediction in patients diagnosed with CSDH. For the external validation of prognostic models, we used a retrospective database, containing data of 2384 patients from three Dutch regions. Prognostic models were included if they predicted either mortality, hematoma recurrence, functional outcome, or quality of life. Models were excluded when predictors were absent in our database or available for < 150 patients in our database. We assessed calibration, and discrimination (quantified by the concordance index C) of the included prognostic models in our retrospective database.ResultsWe identified 1680 original publications of which 1656 were excluded based on title or abstract, mostly because they did not concern CSDH or did not define a prognostic model. Out of 18 identified models, three could be externally validated in our retrospective database: a model for 30-day mortality in 1656 patients, a model for 2 months, and another for 3-month hematoma recurrence both in 1733 patients. The models overestimated the proportion of patients with these outcomes by 11% (15% predicted vs. 4% observed), 1% (10% vs. 9%), and 2% (11% vs. 9%), respectively. Their discriminative ability was poor to modest (C of 0.70 [0.63-0.77]; 0.46 [0.35-0.56]; 0.59 [0.51-0.66], respectively).ConclusionsNone of the examined models showed good predictive performance for outcomes after CSDH treatment in our dataset. This study confirms the difficulty in predicting outcomes after CSDH and emphasizes the heterogeneity of CSDH patients. The importance of developing high-quality models by using unified predictors and relevant outcome measures and appropriate modeling strategies is warranted.

Dataset Information

Association between biomarkers and clinical characteristics in chronic subdural hematoma patients assessed with lasso regression.

Publications

Association between biomarkers and clinical characteristics in chronic subdural hematoma patients assessed with lasso regression.

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