scholarly journals Serum selenium level and cancer risk: a nested case-control study

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Steven A. Narod ◽  
Tomasz Huzarski ◽  
Anna Jakubowska ◽  
Jacek Gronwald ◽  
Cezary Cybulski ◽  
...  
Keyword(s):  
Cancer Risk ◽  
Case Control Study ◽  
Case Control ◽  
Serum Selenium ◽  
Baseline Serum ◽  
Increased Risk ◽  
Low Selenium ◽  
Nested Case Control ◽  
Risk Of Cancer ◽  
Control Study

Abstract Background Epidemiologic studies have demonstrated a relationship between selenium status and cancer risk among those with low selenium levels. It is of interest to prospectively evaluate the relationship between selenium and cancer among women who reside in a region with ubiquitously low selenium levels. Methods We performed a nested case-control study of baseline serum selenium levels and cancer risk using data and biological samples from 19,573 females that were participants in a biobanking initiative between 2010 and 2014 in Szczecin Poland. Cases included women with any incident cancer (n = 97) and controls (n = 184) were women with no cancer at baseline or follow-up. Serum selenium was quantified using mass spectroscopy. Results The odds ratio associated being below the cutoff of 70.0 μg/L compared to a level above 70.0 μg/L was 2.29 (95% CI 1.26–4.19; P = 0.007). The risks for women in the two middle categories were similar and suggests that the normal range be between 70 μg/L and 90 μg/L. There was evidence for an increased risk of cancer among women in the highest category of selenium levels (i.e., > 90 μg/L), but this association did not achieve statistical significance (OR = 1.63; 95%CI 0.63–4.19; P = 0.31). Conclusions Results from this study suggest that suggest that the optimum serum level of selenium in women living in Poland should be between 70 μg/L and 90 μg/L.

scholarly journals Methylation of WT1, CA10 in peripheral blood leukocyte is associated with breast cancer risk: a case-control study

2020 ◽  
Author(s):  
Anqi Ge ◽  
Song Gao ◽  
Yupeng Liu ◽  
Hui Zhang ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Breast Cancer Risk ◽  
Cancer Risk ◽  
Case Control Study ◽  
Case Control ◽  
Elevated Risk ◽  
Luminal B ◽  
Increased Risk ◽  
Risk Of Cancer ◽  
Control Study

Abstract Background: Studies have shown that abnormal changes of specific-gene DNA methylation in leukocytes may be associated with an elevated risk of cancer. However, associations between the methylation of the zinc-related genes, WT1 and CA10, and breast cancer risk remain unknown. Methods: The methylation of WT1 and CA10 was analyzed by methylation-sensitive high-resolution-melting (MS-HRM) in a case-control study with female subjects (N=959). Logistic regression was used to analyze the associations, and propensity score (PS) method was used to adjust confounders. Results: The results showed that WT1 hypermethylation was associated with an increased risk of breast cancer, with an odds ratio (OR) of 3.07 [95% confidence interval (CI): 1.67-5.64, P<0.01]. Subgroup analyses showed that WT1 hypermethylation was specifically associated with an elevated risk of luminal A subtype (OR=2.62, 95% CI: 1.11-6.20, P=0.03) and luminal B subtype (OR=3.23, 95% CI: 1.34-7.80, P=0.01). CA10 hypermethylation was associated with an increased risk of luminal B subtype (OR=1.80, 95% CI: 1.09-2.98, P=0.02). Conclusion: The results of the present study suggest that the hypermethylation of WT1 methylation in leukocytes is significantly associated with an increased risk of breast cancer. The hypermethylation of WT1 is associated with an increased risk of luminal subtypes of breast cancer, and the hypermethylation of CA10 is associated with an increased risk of luminal B subtype of breast cancer.

scholarly journals Irritable bowel syndrome and Parkinson’s disease risk: register-based studies

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Bojing Liu ◽  
Arvid Sjölander ◽  
Nancy L. Pedersen ◽  
Jonas F. Ludvigsson ◽  
Honglei Chen ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Irritable Bowel Syndrome ◽  
Case Control Study ◽  
Case Control ◽  
Twin Registry ◽  
Increased Risk ◽  
Irritable Bowel ◽  
Nested Case Control ◽  
Control Study ◽  
Swedish Twin Registry

AbstractTo examine whether irritable bowel syndrome (IBS) was related to the future risk of Parkinson’s disease (PD), we conducted a nested case-control study in the Swedish total population including 56,564 PD cases identified from the Swedish Patient Register and 30 controls per case individually matched by sex and year of birth. Odds ratios (ORs) with 95% confidence intervals (CIs) for having a prior diagnosis of IBS were estimated using conditional logistic regression. We furthermore conducted a cohort study using the Swedish Twin Registry following 3046 IBS patients identified by self-reported abdominal symptoms and 41,179 non-IBS individuals. Through Cox proportional hazard models, we estimated hazard ratios (HRs) and 95% CIs for PD risk. In the nested case-control study, 253 (0.4%) PD cases and 5204 (0.3%) controls had a previous IBS diagnosis. IBS diagnosis was associated with a 44% higher risk of PD (OR = 1.44, 95% CI 1.27–1.63). Temporal relationship analyses showed 53% and 38% increased risk of PD more than 5 and 10 years after IBS diagnosis, respectively. In the cohort analysis based on the Swedish Twin Registry, there was no statistically significantly increased risk of PD related to IBS (HR = 1.25, 95% CI = 0.87–1.81). Our results suggest a higher risk of PD diagnosis after IBS. These results provide additional evidence supporting the importance of the gut–brain axis in PD.

scholarly journals Association of proton pump inhibitors and concomitant drugs with risk of acute kidney injury: a nested case–control study

BMJ Open ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. e041543
Author(s):  
Keiko Ikuta ◽  
Shunsaku Nakagawa ◽  
Kenji Momo ◽  
Atsushi Yonezawa ◽  
Kotaro Itohara ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Proton Pump Inhibitors ◽  
Proton Pump ◽  
Case Control Study ◽  
Kidney Injury ◽  
Case Control ◽  
Renal Diseases ◽  
Increased Risk ◽  
Nested Case Control ◽  
Control Study

ObjectivesThis study aimed to assess whether the combined use of proton pump inhibitors (PPIs) with non-steroidal anti-inflammatory drugs (NSAIDs) or antibiotics (penicillins, macrolides, cephalosporins or fluoroquinolones) was associated with an increased risk of acute kidney injury (AKI).DesignA nested case–control study.SettingA health insurance claims database constructed by the Japan Medical Data Center.ParticipantsPatients were eligible if they were prescribed a PPI, NSAID and antibiotic at least once between January 2005 and June 2017. The patients who were new PPI users and did not have any history of renal diseases before cohort entry were included (n=219 082). The mean age was 45 and 44% were women.InterventionsCurrent use of PPIs, NSAIDs, or antibiotics.Primary outcome measuresAcute kidney injury.ResultsDuring a mean follow-up of 2.4 (SD, 1.7) years, 317 cases of AKI were identified (incidence rate of 6.1/10 000 person-years). The current use of PPIs was associated with a higher risk of AKI compared with past PPI use (unadjusted OR, 4.09; 95% CI, 3.09 to 5.44). The unadjusted ORs of AKI for the current use of PPIs with NSAIDs, cephalosporins and fluoroquinolones, compared with the current use of PPIs alone, were 3.92 (95% CI, 2.40 to 6.52), 2.57 (1.43 to 4.62) and 3.08 (1.50 to 6.38), respectively. The effects of concurrent use of PPIs with NSAIDs, cephalosporins or fluoroquinolones remain significant in the adjusted model. The analyses on absolute risk of AKI confirmed the results from the nested case–control study.ConclusionsConcomitant use of NSAIDs with PPIs significantly increased the risk for AKI. Moreover, the results suggested that concomitant use of cephalosporins or fluoroquinolones with PPIs was associated with increased risk of incident AKI.

scholarly journals Effect of Periodontitis and Scaling and Root Planing on Risk of Pharyngeal Cancer: A Nested Case—Control Study

2020 ◽  
Vol 18 (1) ◽  
pp. 8
Author(s):  
Ping-Ju Chen ◽  
Yin-Yang Chen ◽  
Chiao-Wen Lin ◽  
Ying-Tung Yeh ◽  
Han-Wei Yeh ◽  
...  
Keyword(s):  
Health Insurance ◽  
Oropharyngeal Cancer ◽  
Case Control Study ◽  
Case Control ◽  
Scaling And Root Planing ◽  
Pharyngeal Cancer ◽  
Root Planing ◽  
Increased Risk ◽  
Nested Case Control ◽  
Control Study

This study investigated the association between periodontitis and the risk of pharyngeal cancer in Taiwan. For this population-based nested case–control study using the Longitudinal Health Insurance Database derived from Taiwan’s National Health Insurance Research Database, we identified patients (n = 1292) who were newly diagnosed with pharyngeal cancer between 2005 and 2013 and exactly paired them with propensity score matched control subjects (n = 2584). Periodontitis and scaling and root planing (SRP) were identified before the index date. Pharyngeal cancer was subdivided into 3 subgroups on the basis of anatomic location: nasopharyngeal cancer, oropharyngeal cancer, and hypopharyngeal cancer. A multiple conditional logistic regression model was applied to analyze the adjusted odds ratio (aOR). Periodontitis was associated with an increased risk of pharyngeal cancer (aOR, 1.57; 95% confidence interval (CI), 1.17 to 2.10), especially oropharyngeal cancer (aOR, 2.22; 95% CI, 1.07 to 4.60). We found a decreased risk of pharyngeal cancer in patients who had undergone SRP (aOR, 0.77; 95% CI, 0.61 to 0.96). In conclusion, this study showed that periodontitis was associated with an increased risk of pharyngeal cancer and SRP exerted a protective effect against pharyngeal cancer. Our results suggest that treating periodontitis and performing SRP, which are modifiable factors in oral health, in clinical practice may provide an opportunity to decrease the disease burden of pharyngeal cancer in Taiwan.

Association between blood transfusion and ventilator-associated events: a nested case-control study

2021 ◽  
pp. 1-6
Author(s):  
Wen Wang ◽  
Qiao He ◽  
Shichao Zhu ◽  
Mingqi Wang ◽  
Yan Kang ◽  
...  
Keyword(s):  
Blood Transfusion ◽  
Case Control Study ◽  
Case Control ◽  
Incidence Density ◽  
Cox Models ◽  
Hospital System ◽  
Increased Risk ◽  
Healthcare Associated ◽  
Nested Case Control ◽  
Control Study

Abstract Objectives: The association between blood transfusion and ventilator-associated events (VAEs) has not been fully understood. We sought to determine whether blood transfusion increases the risk of a VAE. Design: Nested case-control study. Setting: This study was based on a registry of healthcare-associated infections in intensive care units at West China Hospital system. Patients: 1,657 VAE cases and 3,293 matched controls were identified. Methods: For each case, 2 controls were randomly selected using incidence density sampling. We defined blood transfusion as a time-dependent variable, and we used weighted Cox models to calculate hazard ratios (HRs) for all 3 tiers of VAEs. Results: Blood transfusion was associated with increased risk of ventilator-associated complication-plus (VAC-plus; HR, 1.47; 95% CI, 1.22–1.77; P <.001), VAC-only (HR, 1.29; 95% CI, 1.01–1.65; P = .038), infection-related VAC-plus (IVAC-plus; HR, 1.78; 95% CI, 1.33–2.39; P < .001), and possible ventilator-associated pneumonia (PVAP; HR, 2.10; 95% CI, 1.10–3.99; P = .024). Red blood cell (RBC) transfusion was also associated with increased risk of VAC-plus (HR, 1.34; 95% CI, 1.08–1.65; P = .007), IVAC-plus (HR, 1.70; 95% CI, 1.22–2.36; P = .002), and PVAP (HR, 2.49; 95% CI, 1.17–5.28; P = .018). Compared to patients without transfusion, the risk of VAE was significantly higher in patients with RBC transfusions of >3 units (HR, 1.73; 95% CI, 1.25–2.40; P = .001) but not in those with RBC transfusions of 0–3 units. Conclusion: Blood transfusions were associated with increased risk of all tiers of VAE. The risk was significantly higher among patients who were transfused with >3 units of RBCs.

Posttraumatic Stress Disorder and Cancer Risk: A Nested Case‐Control Study

2018 ◽  
Vol 31 (6) ◽  
pp. 919-926
Author(s):  
Elana Cohn ◽  
Ido Lurie ◽  
Yu‐Xiao Yang ◽  
Warren B. Bilker ◽  
Kevin Haynes ◽  
...  
Keyword(s):  
Posttraumatic Stress Disorder ◽  
Cancer Risk ◽  
Posttraumatic Stress ◽  
Case Control Study ◽  
Stress Disorder ◽  
Case Control ◽  
Nested Case Control ◽  
Control Study
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