Mechanical failure of 113 uncemented modular revision femoral components

Aims We evaluated a large database with mechanical failure of a single uncemented modular femoral component, used in revision hip arthroplasty, as the end point and compared them to a control group treated with the same implant. Patient- and implant-specific risk factors for implant failure were analyzed. Methods All cases of a fractured uncemented modular revision femoral component from one manufacturer until April 2017 were identified and the total number of implants sold until April 2017 was used to calculate the fracture rate. The manufacturer provided data on patient demographics, time to failure, and implant details for all notified fractured devices. Patient- and implant-specific risk factors were evaluated using a logistic regression model with multiple imputations and compared to data from a previously published reference group, where no fractures had been observed. The results of a retrieval analysis of the fractured implants, performed by the manufacturer, were available for evaluation. Results There were 113 recorded cases with fracture at the modular junction, resulting in a calculated fracture rate of 0.30% (113/37,600). The fracture rate of the implant without signs of improper use was 0.11% (41/37,600). In 79% (89/113) of cases with a failed implant, either a lateralized (high offset) neck segment, an extralong head, or the combination of both were used. Logistic regression analysis revealed male sex, high body mass index (BMI), straight component design, and small neck segments were significant risk factors for failure. Investigation of the implants (76/113) showed at least one sign of improper use in 72 cases. Conclusion Implant failure at the modular junction is associated with patient- and implant-specific risk factors as well as technical errors during implantation. Whenever possible, the use of short and lateralized neck segments should be avoided with this revision system. Implantation instructions and contraindications need to be adhered to and respected. Cite this article: Bone Joint J 2020;102-B(5):573–579.

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Association of Hypertriglycerideamia with Ischaemic Stroke

Bangladesh Journal of Neuroscience ◽

10.3329/bjn.v32i1.57411 ◽

2016 ◽

Vol 32 (1) ◽

pp. 34-38

Author(s):

Biplob Kumar Das ◽

Kanak Jyoti Mondal

Keyword(s):

Risk Factors ◽

Logistic Regression ◽

Ischaemic Stroke ◽

Significant Risk ◽

Serum Triglyceride ◽

Control Group ◽

Case Group ◽

Stepwise Logistic Regression ◽

Serum Triglyceride Level ◽

Analysis Model

Stroke is one of the foremost causes of morbidity, mortality and is a socioeconomic challenge. This is particularly true for developing countries like Bangladesh, where health support system including the rehabilitation system is not within the reach of common people. Hypertriglycerademia has an effective influence in the pathogenesis of Ischaemic Stroke (IS). So, the focus of this study was to evaluate and assess the association of serum triglyceride level in patients of IS. This case control study was carried out in the Department of Neurology in collaboration with Department of Biochemistry, BSMMU, Dhaka from July 2011 to June 2013. In this study, 60 diagnosed cases of ischaemic stroke patients and 60 age and sex matched healthy controls were enrolled. Risk factors of Ischemic Stroke (IS) patients were assessed ( adjusted Odds Ratio) in comparison with healthy adults. In this study, being married [OR. 1.95, 95% CI (0.40-9.42), p=0.409] , smoker [OR.1.65, 95% CI (0.57 - 4.82),p= 0.357], DM [OR. 1.48, 95% CI (0.36-6.06), p=0.582 ], IHD [OR. 1.51, 95% CI (0.29 – 7.89), p=0.624] , HTN [OR. 3.66, 95% CI (1.11–12.12), p=0.033] , overweight [OR.2.31, 95% CI (0.77 – 6.91), 0.135] and obesity [OR. 16.19, 95% CI (1.31–200.6), p=0.030] , increased level of serum TC [OR.8.24, 95% CI (2.07 – 32.83), p=0.003], TG [OR. 9.40, 95% CI (1.17 -75.86), p=0.035], LDL [OR. 0.45, 95% CI (0.10–2.05), p=0.308],and decreased level of HDL [OR. 3.37, 95% CI (1.03 - 12.25), p=0.045] were found as risk factors in developing IS. Independent t-test was done to find out the statistically significant differences of continuous variables like serum lipid profile between case and control group. The mean (SD) value of TG which is focus of this study, was found 237.67 (61.74) in case group, and 169.97 (26.95) in control group which was highly statistically significant (p < 0.0001). All of the significant variables were entered into stepwise logistic regression analysis model. From the logistic regression model, it can be finally concluded that hypertension, obesity, increased level of TC, increased level of TG and decreased level of HDL were statistically significant risk factors for development of IS. Bangladesh Journal of Neuroscience 2016; Vol. 32 (1): 34-38

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Maternal age as a risk factor for cerebral palsy

Anthropological Review ◽

10.2478/anre-2021-0009 ◽

2021 ◽

Vol 84 (2) ◽

pp. 117-131

Author(s):

Marta Sternal ◽

Barbara Kwiatkowska ◽

Krzysztof Borysławski ◽

Agnieszka Tomaszewska

Keyword(s):

Risk Factors ◽

Logistic Regression ◽

Cerebral Palsy ◽

Regression Model ◽

Maternal Age ◽

Logistic Regression Model ◽

Significant Risk ◽

Control Group ◽

Logistic Regression Models ◽

Pregnancy And Childbirth

Abstract The relationship between maternal age and the occurrence of cerebral palsy is still highly controversial. The aim of the study was to examine the effect of maternal age on the risk of CP development, taking into account all significant risk factors and the division into single, twin, full-term, and pre-term pregnancies. The survey covered 278 children with CP attending selected educational institutions in Poland. The control group consisted of data collected from the medical records of 435 children born at Limanowa county hospital, Poland. The analyses included socio-economic factors, factors related to pregnancy and childbirth, and factors related to the presence of comorbidities and diseases in the child. Constructed logistic regression models were used for statistical analyses. For all age categories included in the estimated models (assessing the effect of demographic factors on the development of CP), only the category of ≤24 years of age (in the group of all children) was significant. It was estimated that in this mother’s age category, the risk of CP is lower (OR 0.6, 95% CI: 0.3–1.0) in comparison to mothers aged 25-29 (p = 0.03). However, estimation with the use of a complex logistic regression model did not show any significant effect of maternal age on the incidence of CP in groups from different pregnancies types. It became apparent that maternal age is a weak predictor of CP, insignificant in the final logistic regression model. It seems correct to assume that the studies conducted so far, showing a significant effect of maternal age in this respect, may be associated with bias in the estimators used to assess the risk of CP due to the fact that other important risk factors for CP development were not included in the research.

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Tuberculosis risk factors in children with smear-positive tuberculosis adult as household contact

Paediatrica Indonesiana ◽

10.14238/pi58.2.2018.66-70 ◽

2018 ◽

Vol 58 (2) ◽

pp. 66-70

Author(s):

Nora Hajarsjah ◽

Ridwan M. Daulay ◽

Oke Rina Ramayani ◽

Wisman Dalimunthe ◽

Rini Savitri Daulay ◽

...

Keyword(s):

Risk Factors ◽

Logistic Regression ◽

Nutritional Status ◽

Significant Risk ◽

Multivariate Logistic Regression Analysis ◽

Household Contact ◽

Bivariate Analysis ◽

Control Group ◽

Case Group ◽

Chi Square

Background Children in household contact of adults with smear-positive tuberculosis (TB) are at higher risk of TB infection. Screening of these children is a main strategy for eliminating childhood TB.Objective To determine risk factors of TB among children in household contact with smear-positive adult TB patients.Methods This case-control study was conducted in 5 public health centers at Batu Bara District, North Sumatera. We studied children from birth to 18 year-old living in the same house as adults with smear-positive TB. A tuberculosis scoring system was used to diagnosis TB in the children. Associations between risk factors and the incidence of TB were analyzed using Chi-square, Mann-Whitney U, and logistic regression tests.Results We enrolled 145 children who had household contact with smear-positive adult TB patients. Subjects were allocated to either the case group [TB score >6; 61 subjects (42.0%)] or the control group [TB score <6; 84 subjects (58.0%)]. Bivariate analysis revealed that nutritional status, immunization status, number of people in the house, sleeping in the same bed, and duration of household contact had significant associations with the incidence of TB. By multivariate logistic regression analysis, nutritional status and duration of household contact were significant risk factors for TB, with OR 5.89 and 8.91, respectively.Conclusion Malnutrition and duration of household contact with smear-positive adult TB patients of more than 6 hours per day were risk factors for TB among children.

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Risk Factors of Recurrent Ischemic Events after Acute Noncardiogenic Ischemic Stroke

Current Pharmaceutical Design ◽

10.2174/1381612825666191029103756 ◽

2020 ◽

Vol 25 (45) ◽

pp. 4827-4834 ◽

Cited By ~ 1

Author(s):

Limin Zhang ◽

Xingang Li ◽

Dongzhi Wang ◽

Hong Lv ◽

Xuezhong Si ◽

...

Keyword(s):

Risk Factors ◽

Logistic Regression ◽

Regression Analysis ◽

Ischemic Stroke ◽

Operating Characteristic ◽

Control Group ◽

Case Group ◽

Stroke Patients ◽

Clopidogrel Therapy ◽

Ischemic Events

Background: A considerable proportion of acute noncardiogenic ischemic stroke patients continue to experience recurrent ischemic events after standard therapy. Aim: We aimed to identify risk factors for recurrent ischemic event prediction at an early stage. Methods : 286 non-cardioembolic ischemic stroke patients with the onset of symptoms within 24 hours were enrolled. Vascular risk factors, routine laboratory data on admission, thromboelastography test seven days after clopidogrel therapy and any recurrent events within one year were assessed. Patients were divided into case group (patients with clinical adverse events, including ischemic stokes, transient ischemic attack, myocardial infarction and vascular related mortality) and control group (events-free patients). The risk of the recurrent ischemic events was determined by the receiver operating characteristic curve and multivariable logistic regression analysis. Results: Clinical adverse events were observed in 43 patients (case group). The mean levels of Mean Platelet Volume (MPV), Platelet/Lymphocyte Ratio (PLR), Lymphocyte Count (LY) and Fibrinogen (Fib) on admission were significantly higher in the case group as compared to the control group (P<0.001). Seven days after clopidogrel therapy, the ADP-induced platelet inhibition rate (ADP%) level was lower in the case group, while the Maximum Amplitude (MA) level was higher in the case group as compared to the control group (P<0.01). The Area Under the Curve (AUC) of receiver operating characteristic(ROC) curve of LY, PLR, , Fib, MA, ADP% and MPV were 0.602, 0.614, 0.629, 0.770, 0.800 and 0.808, respectively. The logistic regression analysis showed that MPV, ADP% and MA were indeed predictive factors. Conclusion: MPV, ADP% and MA were risk factors of recurrent ischemic events after acute noncardiogenic ischemic stroke. Urgent assessment and individual drug therapy should be offered to these patients as soon as possible.

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Risk factors for the failure to achieve normal albumin serum levels after albumin transfusion in neonates

Paediatrica Indonesiana ◽

10.14238/pi56.3.2016.129-33 ◽

2016 ◽

Vol 56 (3) ◽

pp. 129

Author(s):

Nadya Arafuri ◽

Pudjo Hagung Widjajanto ◽

Ekawaty L. Haksari

Keyword(s):

Risk Factors ◽

Critical Illness ◽

Very Low Birth Weight ◽

Significant Risk ◽

Albumin Level ◽

Control Group ◽

Case Group ◽

Severe Bleeding ◽

Normal Albumin ◽

Neonatal Ward

Background Albumin transfusion for the treatment of neonatal hypoalbuminemia may reduce morbidity. In conditions with disrupted endothelial integrity (e.g., sepsis and critical illness), the administered albumin may leak into the interstitial space, hence, serum albumin levels may fall below expected levels after transfusion. To date, few studies have been done to evaluate the risk factors for failure to achieve normal neonatal albumin levels after transfusion.Objectives To determine the risk factors for failure to achieve normal neonatal albumin levels after transfusion.Methods We performed a case-control study in the Neonatal Ward of Dr. Sardjito Hospital from 2007 to 2012. Normal albumin level was defined as above 3 g/dL. The case group included neonates with post-transfusion albumin levels <3 g/dL and the control group included those with post-transfusion albumin ≥3 g/dL. Subjects received intravenous transfusions of 25% or 20% albumin according to the clinical standard of the Neonatal Ward of Dr. Sardjito Hospital. Neonates with very low birth weight, severe birth trauma, burn injuries, severe bleeding, or incomplete medical records were excluded. The data were analyzed with logistic regression test.Results From January 2007 to December 2012, 124 neonates were enrolled in the study. Multivariate analysis showed that low albumin levels before transfusion (OR 12.27; 95%CI 2.17 to 69.30), presence of critical illness (OR 4.01; 95%CI 1.49 to 10.79), diagnosis of sepsis (OR 3.56; 95%CI 1.36 to 9.32), and the >24-hour interval between albumin examination and transfusion (OR 0.06; 95%CI 0.01 to 0.37) were significant risk factors affecting the failure to achieve normal albumin levels.Conclusions Failure to achieve normal albumin levels after transfusion in neonates was significantly associated with low albumin level prior to transfusion, critical illness, sepsis, and >24-hour interval between transfusion and post-transfusion albumin examination.[Paediatr Indones. 2016;56:129-33.].

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Risk factors for hypertensive crisis in children with acute glomerulonephritis

Paediatrica Indonesiana ◽

10.14238/pi56.2.2016.101-6 ◽

2016 ◽

Vol 56 (2) ◽

pp. 101

Author(s):

Sherly Yuniarchan ◽

Risky Vitria Prasetyo ◽

Ninik Asmaningsih Soemyarso ◽

Mohammad Sjaifullah Noer

Keyword(s):

Risk Factors ◽

Logistic Regression ◽

Risk Factor ◽

Pediatric Population ◽

Hypertensive Crisis ◽

Significant Risk ◽

Significant Risk Factor ◽

P Value ◽

Acute Glomerulonephritis ◽

Female Ratio

Background Hypertensive crisis occurs in 1-4% of the hypertensive pediatric population, mostly due to acute glomerulonephritis (AGN). Some factors have been suggested to affect blood pressure (BP) in children, such as age, sex, race/ethnicity, obesity, and socioeconomic status, but little is known for risk factors for hypertensive crisis in AGN.Objective To analyze the risk factors for hypertensive crisis in children with AGN.Methods Retrospectively, we studied possible risk factors for hypertensive crisis in children with AGN at Dr. Soetomo Hospital from 2007 to 2011. Hypertensive crisis was defined as systolic BP ≥180 mmHg or diastolic BP ≥120 mmHg (for children ≥ 6 years of age); and systolic and/or diastolic BP >50% above the 95th percentile (for children aged <6 years). We evaluated the demographic and clinical characteristics as potential risk factors. Statistical analysis was done with Chi-square, Fisher’s exact, and logistic regression tests. Variables with P <0.25 in the univariable analysis were further analyzed by the multivariable logistic regression model. A P value of < 0.05 was considered statistically significant.Results There were 101 children included (mean age 9.7 (SD 2.17) years), with a male-to-female ratio of 2.7:1. Hypertensive crisis occurred in 42 (41.6%) children, of whom 8 had hypertensive urgency and 34 had hypertensive emergency. Proteinuria was seen in 53 children with AGN (52.5%) and was the significant risk factor for hypertensive crisis in our subjects (OR=2.75; 95%CI 1.16 to 6.52; P=0.021). Gender, clinical profiles, ethnicity, nutritional status, blood urea nitrogen (BUN), and glomerular filtration rate (GFR) were not significant risk factors for hypertensive crisis.Conclusion Proteinuria is the significant risk factor for hypertensive crisis in children with AGN.

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Radiographic Predictors of Delayed Carpal Tunnel Syndrome After Distal Radius Fracture in the Elderly

Hand ◽

10.1177/1558944720963876 ◽

2020 ◽

pp. 155894472096387

Author(s):

Kevin H. Kim ◽

Bryan Duell ◽

Swapna Munnangi ◽

Mitchell Long ◽

Elizabeth Morrison

Keyword(s):

Risk Factors ◽

Decision Making ◽

Carpal Tunnel Syndrome ◽

Distal Radius Fracture ◽

Carpal Tunnel ◽

Nonoperative Management ◽

Significant Risk ◽

The Elderly ◽

Control Group ◽

Tunnel Syndrome

Background Delayed-onset carpal tunnel syndrome (DCTS) can develop weeks and months after distal radius fracture (DRFx). A better understanding of the risk factors of DCTS can guide surgeon’s decision making regarding the management of DRFx and also provides another discussion point to be had with elderly patients when discussing outcomes of nonoperative management. Methods We reviewed 216 nonoperatively managed DRFx between June 2015 and January 2019 at a single level 1 trauma center and senior author’s office. We identified 26 patients who developed DCTS at a minimum of 6 weeks after DRFx, which constituted our case group. The remaining 190 patients served as the control group (non–carpal tunnel syndrome [CTS]). Differences between case and control group were evaluated through univariate and multivariate analyses. Results The prevalence of DCTS among nonoperatively managed DRFx was 12%. In univariate analysis, volar tilt (VT) and teardrop angle (TDA) were significant independent predictors of development of DCTS. Multivariate logistic regression analysis determined that the odds of developing CTS increased by 12% and 24% for each degree of decrease in VT and TDA, respectively. No other significant risk factors were identified. Conclusions Decreasing VT and TDA are the most significant risk factors associated with DCTS in nonoperatively managed DRFx. These are simple and reliable radiographic measurements that provide significant prognostic value. These parameters can be used to guide surgeon decision making regarding management of DRFx in the elderly while aiding patient expectations and outcomes following nonoperative management of DRFx.

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Risk factors for mortality in children with Wilms tumor

Paediatrica Indonesiana ◽

10.14238/pi56.4.2016.226-9 ◽

2016 ◽

Vol 56 (4) ◽

pp. 226

Author(s):

Yuni Purwanti ◽

Sutaryo Sutaryo ◽

Sri Mulatsih ◽

Pungky Ardani Kusuma

Keyword(s):

Risk Factors ◽

Risk Factor ◽

Wilms Tumor ◽

Significant Risk ◽

Significant Risk Factor ◽

Stage Iii ◽

Control Group ◽

Case Group ◽

Chi Square ◽

Potential Risk Factors

Background Wilms tumor is the most common renal malignancy in children (95%) and one of the leading causes of death in children, with high mortality rates in developing countries. Identifying risk factors for mortality is important in order to provide early intervention to improve cure rates.Objective To identify risk factors for mortality in children with Wilms tumor.Methods We performed a case-control study of children (0-18 years of age) with Wilms tumor admitted to Dr. Sardjito Hospital between 2005 and 2012. The case group consisted of children who died of Wilms tumor, whereas the control group were children who survived. Data were collected from medical records. Statistical analyses using Chi-square and logistic regression tests were done to determine odds ratios and 95% CI of the potential risk factors for mortality from Wilms tumor.Results Thirty-five children with Wilms tumor were admitted to Dr. Sardjito Hospital during the study period. Nine (26%) children died and 26 survived. Stage ≥III was a significant risk factor for mortality in chidren with Wilms tumor (OR 62.8; 95%CI 5.6 to 70.5). Age ≥2 years (OR 1.4; 95%CI 0.1 to 14.3) and male sex (OR 1.2; 95%CI 0.1 to 10.8) were not significant risk factors for mortality.Conclusion Stage ≥III is a risk factor for mortality in children with Wilms tumor.

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Development of an Algorithm for Stroke Prediction: A National Health Insurance Database Study in Korea

European Neurology ◽

10.1159/000488366 ◽

2018 ◽

Vol 79 (3-4) ◽

pp. 214-220 ◽

Cited By ~ 4

Author(s):

Seung Nam Min ◽

Se Jin Park ◽

Dong Joon Kim ◽

Murali Subramaniyam ◽

Kyung-Sun Lee

Keyword(s):

Risk Factors ◽

Logistic Regression ◽

Health Insurance ◽

National Health Insurance ◽

National Health ◽

Stroke Prevention ◽

Normal Subjects ◽

Control Group ◽

Modifiable Risk Factors ◽

Stroke Patients

Background: Stroke is the second leading cause of death worldwide and remains an important health burden both for the individuals and for the national healthcare systems. Potentially modifiable risk factors for stroke include hypertension, cardiac disease, diabetes, and dysregulation of glucose metabolism, atrial fibrillation, and lifestyle factors. Objects: We aimed to derive a model equation for developing a stroke pre-diagnosis algorithm with the potentially modifiable risk factors. Methods: We used logistic regression for model derivation, together with data from the database of the Korea National Health Insurance Service (NHIS). We reviewed the NHIS records of 500,000 enrollees. For the regression analysis, data regarding 367 stroke patients were selected. The control group consisted of 500 patients followed up for 2 consecutive years and with no history of stroke. Results: We developed a logistic regression model based on information regarding several well-known modifiable risk factors. The developed model could correctly discriminate between normal subjects and stroke patients in 65% of cases. Conclusion: The model developed in the present study can be applied in the clinical setting to estimate the probability of stroke in a year and thus improve the stroke prevention strategies in high-risk patients. The approach used to develop the stroke prevention algorithm can be applied for developing similar models for the pre-diagnosis of other diseases.

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Subcutaneous bone flap storage after emergency craniectomy: cost-effectiveness and rate of resorption

Journal of Neurosurgery ◽

10.3171/2017.6.jns17943 ◽

2018 ◽

Vol 129 (6) ◽

pp. 1604-1610 ◽

Cited By ~ 8

Author(s):

Griffin Ernst ◽

Fares Qeadan ◽

Andrew P. Carlson

Keyword(s):

Risk Factors ◽

Logistic Regression ◽

Bone Resorption ◽

Decompressive Craniectomy ◽

Significant Risk ◽

Bone Flap ◽

Type I ◽

Custom Implant ◽

Autologous Bone ◽

Clinically Significant

OBJECTIVEDecompressive craniectomy is used for uncontrolled intracranial pressure in traumatic brain injury and malignant hemispheric stroke. Subcutaneous preservation of the autologous bone flap in the abdomen is a simple, portable technique but has largely been abandoned due to perceived concerns of resorption. The authors sought to characterize their experience with subcutaneous preservation of the bone flap and cranioplasty.METHODSThe authors performed a retrospective single-institution review of subcutaneous preservation of the autologous bone flap after decompressive craniectomy from 2005 to 2015. The primary outcome was clinically significant bone resorption, defined as requiring a complete mesh implant at the time of cranioplasty, or delayed revision. The outcome also combined cases with any minor bone resorption to determine predictors of this outcome. Logistic regression modeling was used to determine the risk factors for predicting resorption. A cost comparison analysis was also used via the 2-sided t-test to compare the cost of cranioplasty using an autologous bone flap with standard custom implant costs.RESULTSA total of 193 patients with craniectomy were identified, 108 of whom received a cranioplasty. The mean time to cranioplasty was 104.31 days. Severe resorption occurred in 10 cases (9.26%): 4 were clinically significant (2 early and 2 late) and 6 demonstrated type II (severe) necrosis on CT, but did not require revision. Early resorption of any kind (mild or severe) occurred in 28 (25.93%) of 108 cases. Of the 108 patients, 26 (24.07%) required supplemental cranioplasty material. Late resorption of any kind (mild or severe) occurred in 6 (5.88%) of 102 cases. Of these, a clinically noticeable but nonoperative deformity was noted in 4 (3.92%) and minor (type I) necrosis on CT in 37 (37%) of 100. Bivariate analysis identified fragmentation of bone (OR 3.90, 95% CI 1.03–14.8), shunt-dependent hydrocephalus (OR 7.97, 95% CI 1.57–40.46), and presence of post-cranioplasty drain (OR 9.39, 95% CI 1.14–1000) to be significant risk factors for bone resorption. A binary logistic regression optimized using Fisher’s scoring determined the optimal multivariable combination of factors. Fragmentation of bone (OR 5.84, 95% CI 1.38–28.78), diabetes (OR 7.61, 95% CI 1.37–44.56), and shunt-dependent hydrocephalus (OR 9.35, 95% CI 1.64–56.21) were found to be most predictive of resorption, with a C value of 0.78. Infections occurred in the subcutaneous pocket in 5 (2.60%) of the 193 cases and after cranioplasty in 10 (9.26%) of the 108 who underwent cranioplasty. The average cost of cranioplasty with autologous bone was $2156.28 ± $1144.60 (n = 15), and of a custom implant was $35,118.60 ± $2067.51 (3 different sizes; p < 0.0001).CONCLUSIONSCraniectomy with autologous bone cranioplasty using subcutaneous pocket storage is safe and compares favorably to cryopreservation in terms of resorption and favorably to a custom synthetic implant in terms of cost. While randomized data are required to definitively prove the superiority of one method, subcutaneous preservation has enough practical advantages with low risk to warrant routine use for most patients.

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