Pregnancy, Estrogen Exposure, and the Development of Otosclerosis: A Case-Control Study of 1196 Women

2020 ◽  
pp. 019459982096629
Author(s):  
Robert J. Macielak ◽  
John P. Marinelli ◽  
Douglas J. Totten ◽  
Christine M. Lohse ◽  
Brandon R. Grossardt ◽  
...  
Keyword(s):  
Disease Severity ◽  
Odds Ratio ◽  
Case Control Study ◽  
Subsequent Development ◽  
Population Based ◽  
Case Control ◽  
Bilateral Oophorectomy ◽  
Estrogen Exposure ◽  
History Of ◽  
Control Study

Objective This study sought to determine whether a history of pregnancy or bilateral oophorectomy is associated with subsequent otosclerosis development or disease severity. Study Design Population-based case-control study. Setting Olmsted County, Minnesota. Methods Women diagnosed with otosclerosis were matched to 3 women without otosclerosis based on age and historical depth of medical records. Associations of prior delivery and bilateral oophorectomy with subsequent development of otosclerosis and with pure-tone average (PTA) at the time of otosclerosis diagnosis were evaluated. Results We studied 1196 women: 299 cases of otosclerosis and 897 matched controls. The odds ratio for the association of ≥1 delivery with otosclerosis was 1.16 (95% confidence interval [CI] 0.85-1.60; P = .35). Odds ratios for the associations of 1, 2, 3, or ≥4 deliveries with otosclerosis were 1.22 (0.83-1.80), 1.09 (0.71-1.68), 1.28 (0.77-2.12), and 1.00 (0.54-1.84), respectively. The odds ratio for the association of prior bilateral oophorectomy with otosclerosis was 1.12 (0.58-2.18; P = .73). In cases with otosclerosis, PTA at diagnosis was not significantly higher for women with ≥1 delivery as compared with those without (median 45 dB hearing loss [HL] [interquartile range {IQR} 36-55] vs 43 [IQR 34-53]; P = 0.18) but was significantly higher for women with bilateral oophorectomy compared with those without (median 54 dB HL [IQR 44-61] vs 44 [IQR 34-53]; P = .03). Conclusion These data do not support a relationship between endogenous estrogen exposure and development of otosclerosis. Women with otosclerosis who had a history of pregnancy did not have significantly worse hearing at the time of diagnosis, suggesting that pregnancy is not associated with disease severity.

Immune-response against Streptococcus pyogenes in the development of abdominal aortic aneurysm – A population-based case-control study

VASA ◽  
2008 ◽  
Vol 37 (2) ◽  
pp. 143-149 ◽  
Author(s):  
Wanhainen ◽  
Rasmussen ◽  
Björck ◽  
Björck
Keyword(s):  
Immune Response ◽  
Abdominal Aortic Aneurysm ◽  
Streptococcus Pyogenes ◽  
Case Control Study ◽  
Population Based ◽  
Case Control ◽  
Abdominal Aortic ◽  
History Of ◽  
Antibody Levels ◽  
Control Study

Background: In a population-based case-control study the association between antibodies to Streptococcus pyogenes antigens and the development of abdominal aortic aneurysm (AAA) was analysed. Patients and methods: Forty-two patients with screening-detected AAA were compared to 100 age- and sex matched controls with normal aortas. Antibodies against three recently characterized cell wall-attached proteins of S. pyogenes (SclA, SclB and GRAB) were analysed in plasma samples obtained at screening (current), and in samples obtained from a study conducted 12 years previously on the same population (historical). Results: Historical antibody levels against the S. pyogenes antigen GRAB were significantly higher in AAA patients compared with controls (0.25 vs 0.17, p = 0.021). A similar trend was observed in current GRAB antibody levels (0.23 vs 0.17, p = 0.072). GRAB-antibody levels at age 60 years retained the association with AAA in a logistic regression model after adjustment for a history of atherosclerosis (OR 20.2, p = 0.022), current smoking (OR 21.4, p = 0.025) and family history of AAA (OR 12.9, p = 0.053). Current and historical antibody levels against SclA and SclB in AAA patients were similar to those in controls. Conclusions: The results indicate that the immune response against S. pyogenes protein GRAB may be involved in the pathogenesis of AAA.

scholarly journals Adverse childhood or adult experiences and risk of bilateral oophorectomy: a population-based case–control study

BMJ Open ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. e016045 ◽  
Author(s):  
Liliana Gazzuola Rocca ◽  
Carin Y Smith ◽  
Brandon R Grossardt ◽  
Stephanie S Faubion ◽  
Lynne T Shuster ◽  
...  
Keyword(s):  
Case Control Study ◽  
Population Based ◽  
Case Control ◽  
Bilateral Oophorectomy ◽  
Adverse Childhood ◽  
Control Study

A case-control study of risk factors of chronic venous ulceration in patients with varicose veins

2017 ◽  
Vol 33 (1) ◽  
pp. 60-67 ◽  
Author(s):  
Gohar Abelyan ◽  
Lusine Abrahamyan ◽  
Gayane Yenokyan
Keyword(s):  
Risk Factors ◽  
Confidence Interval ◽  
Odds Ratio ◽  
Case Control Study ◽  
Varicose Veins ◽  
Case Control ◽  
Sitting Time ◽  
Venous Ulceration ◽  
History Of ◽  
Control Study

Background/objectives Venous ulcers carry psychological and high financial burden for patients, causing depression, pain, and limitation of mobility. The study aimed to identify factors associated with an increased risk of venous ulceration in patients with varicose veins in Armenia. Methods A case-control study design was utilized enrolling 80 patients in each group, who underwent varicose treatment surgery in two specialized surgical centers in Armenia during 2013–2014 years. Cases were patients with varicose veins and venous leg ulcers. Controls included patients with varicose veins but without venous leg ulcers. Data were collected using interviewer-administered telephone interviews and medical record abstraction. Multiple logistic regression analysis was used to identify the risk factors of venous ulceration. Results There were more females than males in both groups (72.5% of cases and 85.0 % of controls). Cases were on average older than controls (53.9 vs. 39.2 years old, p ≤ 0.001). After adjusting for potential confounders, the estimated odds of developing venous ulcer was higher in patients with history of post thrombotic syndrome (odds ratio = 14.90; 95% confidence interval: 3.95–56.19; p = 0.001), with higher average sitting time (odds ratio = 1.32 per hour of sitting time; 95% confidence interval: 1.08–1.61; p = 0.006), those with reflux in deep veins (odds ratio = 3.58; 95% confidence interval: 1.23–10.31; p = 0.019) and history of leg injury (odds ratio = 3.12; 95% confidence interval: 1.18–8.23; p = 0.022). Regular exercise in form of walking (≥5 days per week) was found to be a protective factor from venous ulceration (odds ratio = 0.26; 95% confidence interval: 0.08–0.90; p = 0.034). Conclusion We found that reflux in deep veins, history of leg injury, history of post thrombotic syndrome, and physical inactivity were significant risk factors for venous ulceration in patients with varicose veins, while regular physical exercise mitigated that risk. Future studies should investigate the relationships between the duration and type of regular exercise and the risk of venous ulceration to make more specific recommendations on preventing ulcer development.

scholarly journals 2013 multistate outbreaks of Cyclospora cayetanensis infections associated with fresh produce: focus on the Texas investigations

2015 ◽  
Vol 143 (16) ◽  
pp. 3451-3458 ◽  
Author(s):  
F. ABANYIE ◽  
R. R. HARVEY ◽  
J. R. HARRIS ◽  
R. E. WIEGAND ◽  
L. GAUL ◽  
...  
Keyword(s):  
Odds Ratio ◽  
Case Control Study ◽  
Case Control ◽  
International Travel ◽  
The Other ◽  
Annual Number ◽  
Temporal Association ◽  
Illness Onset ◽  
History Of ◽  
Control Study

SUMMARYThe 2013 multistate outbreaks contributed to the largest annual number of reported US cases of cyclosporiasis since 1997. In this paper we focus on investigations in Texas. We defined an outbreak-associated case as laboratory-confirmed cyclosporiasis in a person with illness onset between 1 June and 31 August 2013, with no history of international travel in the previous 14 days. Epidemiological, environmental, and traceback investigations were conducted. Of the 631 cases reported in the multistate outbreaks, Texas reported the greatest number of cases, 270 (43%). More than 70 clusters were identified in Texas, four of which were further investigated. One restaurant-associated cluster of 25 case-patients was selected for a case-control study. Consumption of cilantro was most strongly associated with illness on meal date-matched analysis (matched odds ratio 19·8, 95% confidence interval 4·0–∞). All case-patients in the other three clusters investigated also ate cilantro. Traceback investigations converged on three suppliers in Puebla, Mexico. Cilantro was the vehicle of infection in the four clusters investigated; the temporal association of these clusters with the large overall increase in cyclosporiasis cases in Texas suggests cilantro was the vehicle of infection for many other cases. However, the paucity of epidemiological and traceback information does not allow for a conclusive determination; moreover, molecular epidemiological tools for cyclosporiasis that could provide more definitive linkage between case clusters are needed.

scholarly journals Artistic creativity and risk for schizophrenia, bipolar disorder and unipolar depression: a Swedish population-based case–control study and sib-pair analysis

2018 ◽  
Vol 212 (6) ◽  
pp. 370-376 ◽  
Author(s):  
J. H. MacCabe ◽  
A. Sariaslan ◽  
C. Almqvist ◽  
P. Lichtenstein ◽  
H. Larsson ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Mental Disorder ◽  
Odds Ratio ◽  
Case Control Study ◽  
Tertiary Education ◽  
Unipolar Depression ◽  
Population Based ◽  
Case Control ◽  
Increased Risk ◽  
Control Study

BackgroundMany studies have addressed the question of whether mental disorder is associated with creativity, but high-quality epidemiological evidence has been lacking.AimsTo test for an association between studying a creative subject at high school or university and later mental disorder.MethodIn a case–control study using linked population-based registries in Sweden (N = 4 454 763), we tested for associations between tertiary education in an artistic field and hospital admission with schizophrenia (N = 20 333), bipolar disorder (N = 28 293) or unipolar depression (N = 148 365).ResultsCompared with the general population, individuals with an artistic education had increased odds of developing schizophrenia (odds ratio = 1.90, 95% CI = [1.69; 2.12]) bipolar disorder (odds ratio = 1.62 [1.50; 1.75]) and unipolar depression (odds ratio = 1.39 [1.34; 1.44]. The results remained after adjustment for IQ and other potential confounders.ConclusionsStudents of artistic subjects at university are at increased risk of developing schizophrenia, bipolar disorder and unipolar depression in adulthood.Declaration of interestNone.

scholarly journals Levothyroxine use and the risk of colorectal cancer: a large population-based case-control study

2021 ◽  
Author(s):  
Josephina G. Kuiper ◽  
Aline C. Fenneman ◽  
Anne H. van der Spek ◽  
Elena Rampanelli ◽  
Max Nieuwdorp ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Odds Ratio ◽  
Treatment Duration ◽  
Case Control Study ◽  
Significant Risk ◽  
Population Based ◽  
Case Control ◽  
Colorectal Cancer Patients ◽  
Control Study ◽  
Reduced Risk

Objective: Whether an association between oral levothyroxine use, leading to supraphysiological exposure of the colon to thyroid hormones, and risk of colorectal cancer exists in humans is unclear. We therefore aimed to assess whether the use of levothyroxine is associated with a reduced risk of colorectal cancer in a linked cohort of pharmacy and cancer data. Design: Population-based matched case-control study. Methods: A total of 28,121 patients diagnosed with colorectal cancer between 1998-2014 were matched to 106,086 controls. Multivariable logistic regression was used to estimate the association between levothyroxine use and occurrence of colorectal cancer, adjusted for potential confounders. Results were stratified by gender, age, tumour subtype and staging as well as treatment duration and dosing. Results: A total of 1066 colorectal cancer patients (4%) and 4024 (4%) controls had used levothyroxine at any point before index date (adjusted odds ratio 0.95 [0.88-1.01]). Long-term use of levothyroxine was seen in 323 (30%) colorectal cancer patients and 1111 (28%) controls (adjusted odds ratio 1.00 [0.88-1.13]). Stratification by tumour subsite showed a borderline significant risk reduction of rectal cancer, while this was not seen for proximal colon cancer or distal colon cancer. There was no relationship with treatment duration or with levothyroxine dose. Conclusions: In this study, no reduced risk of colorectal cancer was seen in levothyroxine users. When stratifying by tumour subsite, a borderline significant risk reduction of rectal cancer was found and may warrant further research.

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