Risk Factors for Tuberculosis (TB) Among Household Contacts of Patients With Smear-Positive TB in 8 Provinces of Vietnam: A Nested Case-Control Study

2020 ◽  
Author(s):  
Kavindhran Velen ◽  
Nguyen Viet Nhung ◽  
Nguyen Thu Anh ◽  
Pham Duc Cuong ◽  
Nguyen Binh Hoa ◽  
...  
Keyword(s):  
Risk Factors ◽  
Case Control Study ◽  
Factors Associated ◽  
Household Contacts ◽  
Key Population ◽  
History Of ◽  
Nested Case Control ◽  
And Control ◽  
Control Study

Abstract Background Tuberculosis (TB) continues to account for significant morbidity and mortality annually. Household contacts (HHCs) of persons with TB are a key population for targeting prevention and control interventions. We aimed to identify risk factors associated with developing TB among HHCs. Methods We conducted a nested case-control study among HHCs in 8 provinces in Vietnam enrolled in a randomized controlled trial of active case finding for TB. Cases were any HHCs diagnosed and registered with TB within the Vietnam National TB Program during 2 years of follow-up. Controls were selected by simple random sampling from the remaining HHCs. Risk factor data were collected at enrollment and during follow-up. A logistic regression model was developed to determine predictors of TB among HHCs. Results We selected 1254 HHCs for the analysis: 214 cases and 1040 controls. Underlying characteristics varied between both groups; cases were older, more likely to be male, with a higher proportion of reported previous TB and diabetes. Risk factors associated with a TB diagnosis included being male (adjusted odds ratio [aOR], 1.4; 95% confidence interval [CI], 1.03–2.0), residing in an urban setting (aOR, 1.8; 1.3–2.5), prior TB (aOR, 4.6; 2.5–8.7), history of diabetes (aOR, 3.1; 1.7–5.8), current smoking (aOR, 3.1; 2.2–4.4), and prolonged history of coughing in the index case at enrollment (OR , 1.6; 1.1–2.3). Conclusions Household contacts remain an important key population for TB prevention and control. TB programs should ensure effective contact investigations are implemented for household contacts, particularly those with additional risk factors for developing TB.

scholarly journals Risk factors associated with early childhood caries – a case control study

2016 ◽  
Vol 31 (2) ◽  
pp. 83
Author(s):  
Marina De Deus Moura Lima ◽  
Zacarias Soares Brito-Neto ◽  
Heylane Oliveira Amaral ◽  
Cacilda Castelo Branco Lima ◽  
Marcoeli Silva de Moura ◽  
...  
Keyword(s):  
Risk Factors ◽  
Early Childhood ◽  
Early Childhood Caries ◽  
Case Control Study ◽  
Case Control ◽  
Control Group ◽  
Factors Associated ◽  
History Of ◽  
Control Study ◽  
Childhood Caries

Objective: The aim of this study was to determine the risk factors associated with early childhood caries (ECC).Methods: It was an observational retrospective case-control study. The case group consisted of all patients diagnosed with ECC in the records of an active program of maternal and child care. The control group was composed of an equal number of children, matched for gender and age, who attended the program and did not have ECC. The process of data collection consisted of completing a pre-established schedule to analyse variables related to the mother/caregiver and child.Statisticalanalysis was performed using the chi-squared and odds ratio (OR), with alpha (α) = 0.05.Results: History of caries in the mother (OR=2.61; CI 95%=1.45-4.67) and father (OR=1.72; CI 95%=1.02-2.89) were key determinants in the child being diagnosed with ECC.Conclusions: The risk factors associated with ECC were the following: no oral hygiene acceptance, nocturnal feeding duration of more than 16 months, a daily intake of sugar greater than 4 times a day, a Baume type II maxillary arch, fewer than 3 consultations with the program, and a history of decay in the parents.

scholarly journals Risk factors associated with peripheral neuropathy among diabetic individuals: a case control study

2021 ◽  
Vol 8 (2) ◽  
pp. 768
Author(s):  
Christa Kingston ◽  
Aravindan J. ◽  
Srikumar Walsalam
Keyword(s):  
Quality Of Life ◽  
Risk Factors ◽  
Diabetic Neuropathy ◽  
Case Control Study ◽  
Case Control ◽  
Diabetic Patients ◽  
Factors Associated ◽  
History Of ◽  
Control Study

Background: Diabetic neuropathy is one among the most common complication in diabetes mellitus. Diabetic peripheral neuropathy hinders the quality of life causing morbidity and mortality. The purpose of this study was to find the risk factors associated with diabetic neuropathy.Methods: This case control study involved 100 diabetic patients attending the Dohnavur fellowship hospital, Dohnavur from October 2019 to March 2020. Sociodemographic profile and diabetic characteristics of the study group were obtained and analysed. Diagnosis of Diabetic Neuropathy was done by using the diagnostic method proposed by American Diabetic Association.Results: Of the total study population with mean age 59.43 years, 63% had family history of diabetes. Almost 70% had poor diabetic control. Statistically significant relationships were found between neuropathy and duration of diabetes, glycaemic control, history of hypertension, monofilament test and pinprick sensation.Conclusions: In this study, glycemic control, dyslipidemia and hypertension were modifiable risk factors for diabetic neuropathy. Early interventional programs to sensitize diabetics on these factors could improve the quality of life of Diabetic patients. 

scholarly journals Risk factors for progression of juvenile-onset non-radiographic axial spondyloarthritis to juvenile-onset ankylosing spondylitis: a nested case–control study

RMD Open ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. e001867
Author(s):  
Hao-Guang Li ◽  
Dan-Min Wang ◽  
Feng-Cai Shen ◽  
Shu-Xin Huang ◽  
Zhi-Duo Hou ◽  
...  
Keyword(s):  
Risk Factors ◽  
Case Control Study ◽  
Axial Spondyloarthritis ◽  
Disease Onset ◽  
Case Control ◽  
Buttock Pain ◽  
Juvenile Onset ◽  
Factors Associated ◽  
Nested Case Control ◽  
Control Study

ObjectiveTo evaluate the clinical characteristics of juvenile-onset non-radiographic axial spondyloarthritis (nr-axSpA) and to investigate risk factors associated with progression to juvenile-onset ankylosing spondylitis (JoAS).MethodsA nested case–control study was conducted using the retrospectively collected data of 106 patients with juvenile-onset nr-axSpA (age at disease onset, <16 years) in the Clinical characteristic and Outcome in Chinese Axial Spondyloarthritis study cohort. Baseline demographic and clinical characteristics and prognosis were reviewed. Logistic regression analyses were performed to investigate risk factors associated with progression to JoAS.ResultsOverall, 58.5% of patients with juvenile-onset nr-axSpA presented with peripheral symptoms at disease onset. In 82.1% of these patients, axial with peripheral involvement occurred during the disease course. The rate of disease onset at >12 years and disease duration of ≤10 years were significantly higher in those with progression to JoAS than in those without progression to JoAS (83.0% vs 52.8%, p=0.001; 92.5% vs 56.6%, p<0.001, respectively). Multivariable logistic regression analysis revealed that inflammatory back pain (IBP) (OR 13.359 (95% CI 2.549 to 70.013)), buttock pain (OR 10.171 (95% CI 2.197 to 47.085)), enthesitis (OR 7.113 (95% CI 1.670 to 30.305)), elevated baseline C reactive protein (CRP) levels (OR 7.295 (95% CI 1.984 to 26.820)) and sacroiliac joint-MRI (SIJ-MRI) positivity (OR 53.821 (95% CI 9.705 to 298.475)) were significantly associated with progression to JoAS.ConclusionPeripheral involvement was prevalent in juvenile-onset nr-axSpA. IBP, buttock pain, enthesitis, elevated baseline CRP levels and SIJ-MRI positivity in patients with the disease are associated with higher risk of progression to JoAS.

scholarly journals 346. Factors Associated with Hypertension in Young Adults with Perinatally-Acquired HIV Infection: a Case–Control Study

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S184-S184
Author(s):  
Patrick O’Neil ◽  
Patrick Ryscavage ◽  
Kristen A Stafford
Keyword(s):  
Risk Factors ◽  
Young Adults ◽  
Family History ◽  
Case Control Study ◽  
Case Control ◽  
Systemic Hypertension ◽  
Early Management ◽  
Factors Associated ◽  
History Of ◽  
Control Study

Abstract Background The incidence of systemic hypertension (HTN) among perinatally-HIV-infected (PHIV) patients appears to increase as they enter adulthood. Among non-perinatally HIV-infected adults both traditional and HIV-associated risk factors have been found to contribute to HTN. Whether these same factors contribute to HTN in PHIV is unknown. The purpose of this study was to determine the socio-demographic, clinical, virologic, and immunologic factors associated with HTN among a cohort of PHIV adolescents and young adults, aged ≥18 years. Methods We conducted a case–control study among a population of 160 PHIV adults with and without HTN who were receiving care at the University of Maryland and aged 18–35 years as of December 31, 2017. Covariates assessed included traditional risk factors such as age, family history of HTN, and smoking, as well as HIV- and antiretroviral-associated covariates. Results We identified 49 HTN cases (30.6%) and 111 (69.4%) controls. There were no significant differences in the odds of most traditional (age, gender, race, family history of HTN, tobacco, alcohol, and/or other drug use) or HIV-associated (CD4 nadir <100 cells/mm3, individual ART exposure, ART interruption) risk factors among PHIV adults with HTN compared with those with no diagnosis of HTN. Cases had lower odds of a history of treatment with lopinavir/ritonavir (LPV/r). Cases had 3.7 (95% CI 1.11, 12.56) times the odds of a prior diagnosis of chronic kidney disease (CKD) compared with controls after controlling for CD4 nadir and ARV treatment history. Conclusion The results of this study suggest that most traditional and HIV-related risk factors do not appear to increase the odds of having HTN in this PHIV cohort. However, HTN among PHIV may be driven in part by CKD, and a focus on the prevention and early management of CKD in this group may be necessary to prevent the development of HTN. Additionally, there may be as yet unidentified risk factors for HTN among PHIV which require further exploration. Given the large and growing population of PHIV entering adulthood worldwide, it is imperative to explore risk factors for and effects of HTN in large, diverse PHIV populations. Disclosures All authors: No reported disclosures.

scholarly journals Factors Associated With Early-Onset Esophageal Cancer in Tanzania: A Case-Control Study

2018 ◽  
Vol 4 (Supplement 1) ◽  
pp. 29s-29s
Author(s):  
Geoffrey Buckle ◽  
Elia J. Mmbaga ◽  
Alan Paciorek ◽  
Larry Akoko ◽  
Katrina Deardorff ◽  
...  
Keyword(s):  
Risk Factors ◽  
Household Income ◽  
Early Onset ◽  
Case Control Study ◽  
Age Groups ◽  
Young Patients ◽  
Second Hand Smoke ◽  
Factors Associated ◽  
History Of ◽  
Control Study

Abstract 89 Purpose Previous studies have characterized geographic clusters of esophageal cancer (EC) in East Africa. Many of the epidemiologic features of EC in this context are shared globally with other clusters, including high rates, male predominance, and squamous cell histology. A unique feature in East Africa is the high proportion of young patients, with a recent case series reporting up to 24% of patients age < 45 years. The aim of the current study was to assess factors that are associated with early-onset EC in Tanzania (TZ). Methods We performed a secondary analysis of a previous case-control study. Patients with newly diagnosed EC were recruited at Muhimbili National Hospital and Ocean Road Cancer Institute in 2014 to 2016. Hospital controls were identified from patients with nonmalignant conditions and matched 1:1 for gender and age ± 10 years. Risk factors were assessed through interviews. Logistic regression was used to estimate age-specific odds ratios (ORs) of EC for exposures across age groups (30 to 44 years, 45 to 59 years, and ≥ 60 years) and for interactions with age. Results A total of 473 cases and 473 controls were enrolled. Median ages were 59 years (range, 30 to 91 years) for cases and 55 years (range, 31 to 88 years) for controls. Among cases, 102 patients (22%) were age 30 to 44 years, 144 patients (30%) were age 45 to 59 years, and 227 patients (48%) were age ≥ 60 years. High household income was protective for those age 30 to 44 years (OR, 0.08; 95% CI, 0.01 to 0.69) and 45 to 59 years (OR, 0.13; 95% CI, 0.04 to 0.45), but not for those age ≥ 60 years (effect modification P = .047). Family history of EC was associated with a higher risk of EC among those age 45 to 59 years (OR, 3.8; 95% CI, 1.02 to 14.47) and age ≥ 60 years (OR, 6.63; 95% CI, 1.50 to 29.37), with no effect among those age 30 to 44 years (effect modification P = .019). Second-hand smoke and infrequent teeth cleaning were also associated with early-onset EC, but did not differ significantly across age groups. Additional factors associated with EC risk across all ages were firewood use (cooking), kerosene use (lighting), work on a maize farm, and in-home grain and nut storage. Protective factors were the regular use of medication, surrogates of high socioeconomic status (TV, radio, refrigerator, indoor toilet, and electricity), and charcoal or gas cooking. Conclusion Multiple exposures were identified as risk factors for early-onset EC in TZ. In age-stratified analyses, household income, second-hand smoke, and poor dental hygiene emerged as possible risk factors, whereas family history of EC had strong associations among the older but not the young age group. Our results suggest that environmental factors may underlie the high incidence of young patients with EC in TZ. AUTHORS' DISCLOSURES OF POTENTIAL CONFLICTS OF INTEREST No COIs from the authors.

scholarly journals Epilepsy and mortality: a retrospective cohort analysis with a nested case–control study identifying causes and risk factors from primary care and linkage-derived data

BMJ Open ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. e052841
Author(s):  
Gabriella Wojewodka ◽  
Martin C Gulliford ◽  
Mark Ashworth ◽  
Mark P Richardson ◽  
Leone Ridsdale
Keyword(s):  
Risk Factors ◽  
Primary Care ◽  
General Population ◽  
Cause Of Death ◽  
Retrospective Cohort ◽  
Case Control Study ◽  
Case Control ◽  
Factors Associated ◽  
Nested Case Control ◽  
Control Study

ObjectivesPeople with epilepsy (PWE) have a higher mortality rate than the general population. Epilepsy-related deaths have increased despite all-cause mortality decreasing in the general population pre-COVID-19. We hypothesised that clinical and lifestyle factors may identify people more at risk.DesignWe used a retrospective cohort study to explore cause of death and a nested case–control study to identify risk factors.SettingWe explored factors associated with mortality using primary care population data from 1 April 2004 to 31 March 2014. Data were obtained from the Clinical Practice Research Datalink which compiles anonymised patient data from primary care in the UK. Cause of death data was supplemented from the Office of National Statistics when available.ParticipantsThe analysis included 70 431 PWE, with 11 241 registered deaths.ResultsThe number of deaths within the database increased by 69% between the first and last year of the study. Epilepsy was considered as a contributing cause in approximately 45% of deaths of PWE under 35. Factors associated with increased risk of death included attendance at emergency departments and/or emergency admissions (OR 3.48, 95% CI 3.19 to 3.80), antiepileptic drug (AED) polytherapy (2 AEDs: OR 1.60, 95% CI 1.51 to 1.71; 3 AEDs: OR 2.06, 95% CI 1.86 to 2.29; 4+AEDs: OR 2.62, 95% CI 2.23 to 3.08), status epilepticus (OR 2.78, 95% CI 1.64 to 4.71), depression (OR 1.67, 95% CI 1.57 to 1.76) and injuries (OR 1.54, 95% CI 1.43 to 1.67). No seizures in the prior year (OR 0.52, 95% CI 0.41 to 0.65).ConclusionOur results add to existing evidence that deaths in epilepsy are increasing. Future studies could focus on identifying PWE at high risk and addressing them with clinical interventions or better self-management. Identifying specific risk factors for younger people should be a priority as epilepsy may be a factor in close to half of deaths of PWE under 35 years of age.

scholarly journals Risk factors for bleeding in haemato-oncology patients—a nested case–control study: The BITE study protocol (Bleeding In Thrombocytopenia Explained)

BMJ Open ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. e034710 ◽  
Author(s):  
Loes L Cornelissen ◽  
Camila Caram-Deelder ◽  
Johanna G van der Bom ◽  
Rutger A Middelburg ◽  
Jaap Jan Zwaginga
Keyword(s):  
Risk Factors ◽  
Case Control Study ◽  
Conditional Logistic Regression ◽  
Case Control ◽  
Source Population ◽  
Bleeding Events ◽  
Oncological Patients ◽  
Nested Case Control ◽  
And Control ◽  
Control Study

IntroductionHaemato-oncological patients often receive platelet count driven prophylactic platelet transfusions to prevent bleeding. However, many prophylactically transfused patients still bleed. More knowledge on risk factors for bleeding is therefore needed. This will enable identification of bleeding risk profiles on which future transfusion policy can be optimised. The present BITE study (Bleeding In Thrombocytopenia Explained) aims to identify clinical conditions and biomarkers that are associated with clinically relevant bleeding events.Methods and analysisA matched case–control study nested in a cohort of haemato-oncological patients in the Netherlands. We collect a limited number of variables from all eligible patients, who together form the source population. These patients are followed for the occurrence of clinically relevant bleeding. Consenting patients of the source population form the cohort. Cases from the cohort are frequency matched to selected control patients for the nested case–control study. Of both case and control patients more detailed clinical data is collected.Study populationAdult haemato-oncological patients, who are admitted for intensive chemotherapeutic treatment or stem cell transplantation, or who received such treatments in the past and are readmitted for disease or treatment-related adverse events.Statistical analysisBleeding incidences will be calculated for the total source population, as well as for different subgroups. The association between potential risk factors and the occurrence of bleeding will be analysed using conditional logistic regression, to account for matching of case and control patients.Ethics and disseminationThe study was approved by the Medical Research Ethics Committee Leiden Den Haag and Delft, and the Radboudumc Committee on Research Involving Human Subjects. Approval in seven other centres is foreseen. Patients will be asked for written informed consent and data is coded before analyses, according to Dutch privacy law. Results will be published in peer-reviewed journals.Trial registration numberNL62499.058.17. NCT03505086; Pre-results.

scholarly journals Risk factors associated with hypertensive disorders in pregnancy in Nekemte referral hospital, from July 2015 to June 2017, Ethiopia: case-control study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Leta Hinkosa ◽  
Almaz Tamene ◽  
Negeso Gebeyehu
Keyword(s):  
Risk Factors ◽  
Case Control Study ◽  
Case Control ◽  
Hypertensive Disorders Of Pregnancy ◽  
Positive History ◽  
Factors Associated ◽  
Hypertensive Disorders ◽  
History Of ◽  
Control Study ◽  
In Pregnancy

Abstract Background Hypertension is the most common medical problem encountered in pregnancy and is a leading cause of perinatal and maternal morbidity and mortality. However, its magnitude and risk factors yet not adequately assessed at the study area. Methods Facility-based retrospective unmatched case-control study was conducted to identify risk factors associated with Hypertensive disorders of pregnancy in Nekemte Referral Hospital just two years back from study period July 1, 2015, to June 30, 2017. Bivariate logistic regression was considered for inclusion in to the multivariate logistic regression. Finally, multi varaite analysis were done to identify risk factors of hypertensive disorders of pregnancy. Results Among 6826 total delivery records from July 2015 –June 2017, 199 women developed hypertension during pregnancy. Among 199 women 153(76.9%) were pre-eclampsia/eclampsia,28(14.1%) were gestational hypertension, 14(0.7%) were superimposed hypertension and 4 (2.9%) were chronic hypertension. Age ≥ 35 (AOR: 2.51, 95% CI: 1.08, 5.83), rural residential area (AOR: 1.79, 95% CI: 1.150, 2.799), prim gravida (AOR: 3.39, 95% CI: 2.16, 5.33), null parity (AOR: 4.35, 95% CI: 2.36, 8.03), positive history of abortion (AOR: 4.39, 95% CI: 1.64, 11.76), twin pregnancy (AOR: 3.78, 95% CI: 1.52, 9.39), lack of ANC follow up (AOR: 3.05, 95% CI: 1.56, 5.96) as well as positive pre-existing hypertension (AOR: 3.81, 95% CI: 1.69, 8.58), positive family history of hypertension (AOR: 5.04, 95% CI: 2.66, 9.56) and positive history of diabetes mellitus (AOR: 5.03, 95% CI: 1.59, 15.89) were risk factors for hypertensive disorders during pregnancy. Conclusion This study found that Women with hypertension during pregnancy have a greater risk of developing adverse pregnancy outcome as compared to normotensive pregnant women. so, identification of these risk factors would be useful for early diagnosis of hypertension disorders during pregnancy to give appropriate clinical monitoring and treatments and timely managing maternal and perinatal complications.

scholarly journals Case-Control Study of Risk Factors Associated with Feline and Canine Chronic Kidney Disease

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Paul C. Bartlett ◽  
James W. Van Buren ◽  
Andrew D. Bartlett ◽  
Chun Zhou
Keyword(s):  
Risk Factors ◽  
Weight Loss ◽  
Case Control Study ◽  
Clinical Signs ◽  
Case Control ◽  
Factors Associated ◽  
History Of ◽  
Bad Breath ◽  
Dog Owners ◽  
Control Study

An age-matched case-control study was initiated to determine the major risk factors associated with CKD in cats and dogs and to determine what clinical signs cat and dog owners observed before their veterinarian diagnosed their pet with CKD. When compared to controls, the feline cases were more likely to have had polydipsia and polyuria in the year before the owners' cats were diagnosed with CKD. In the dogs, increased water intake, increased urination, small size and a recent history of weight loss and bad breath were noticed by the dog owners before veterinary CKD diagnosis. Dog owners recognized abnormal drinking and urination behavior over half a year before their pet's veterinary diagnosis with CKD, and they recognized weight loss almost 4 months before CKD diagnosis. Bad breath was noticed 1.2 years before recognition of CKD by a veterinarian. Given that earlier CKD diagnosis should have been possible in most cases, clinical trials should proceed to measure the efficacy of early interventions.

scholarly journals Clinical characteristics, risk factors and outcome of severe Norovirus infection in kidney transplant patients: a case-control study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Julien Gras ◽  
Moustafa Abdel-Nabey ◽  
Axelle Dupont ◽  
Jérôme Le Goff ◽  
Jean-Michel Molina ◽  
...  
Keyword(s):  
Risk Factors ◽  
Acute Rejection ◽  
Kidney Transplant ◽  
Case Control Study ◽  
De Novo ◽  
Case Control ◽  
Duration Of Symptoms ◽  
Factors Associated ◽  
Control Study

Abstract Background Human Norovirus (HuNoV) has recently been identified as a major cause of diarrhea among kidney transplant recipients (KTR). Data regarding risk factors associated with the occurrence of HuNoV infection, and its long-term impact on kidney function are lacking. Methods We conducted a retrospective case-control study including all KTR with a diagnosis of HuNoV diarrhea. Each case was matched to a single control according to age and date of transplantation, randomly selected among our KTR cohort and who did not develop HuNoV infection. Risk factors associated with HuNoV infection were identified using conditional logistic regression, and survival was estimated using Kaplan-Meier estimator. Results From January 2012 to April 2018, 72 cases of NoV diarrhea were identified among 985 new KT, leading to a prevalence of HuNoV infection of 7.3%. Median time between kidney transplantation and diagnosis was 46.5 months (Inter Quartile Range [IQR]:17.8–81.5), and the median duration of symptoms 40 days (IQR: 15–66.2). Following diagnosis, 93% of the cases had a reduction of immunosuppression. During follow-up, de novo Donor Specific Antibody (DSA) were observed in 8 (9%) cases but none of the controls (p = 0.01). Acute rejection episodes were significantly more frequent among cases (13.8% versus 4.2% in controls; p = 0,03), but there was no difference in serum creatinine level at last follow-up between the two groups (p = 0.08). Pre-transplant diabetes and lymphopenia below 1000/mm3 were identified as risks factors for HuNoV infection in multivariate analysis. Conclusion HuNoV infection is a late-onset and prolonged infection among KTR. The current management, based on the reduction of immunosuppressive treatment, is responsible for the appearance of de novo DSA and an increase in acute rejection episodes.

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