Articles on case control study

A case-control study of pancreatic cancer and cigarettes ...

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Abstract. A pancreatic cancer case-control study was conducted in the Minneapolis-St. Paul area. Family members were interviewed about the subject's usage of cigarettes, alcohol, coffee, and other dietary factors in the two years prior to death (cases, n = 212) or prior to interview (controls, n = 220).

A case-control study of pancreatic cancer and cigarettes ...

Case–Control Study of Human Papillomavirus and ...

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A case-control study is designed to help determine if an exposure is associated with an outcome (i.e., disease or condition of interest). In theory, the case-control study can be described simply. First, identify the cases (a group known to have the outcome) and the controls (a group known to be ...

Case–Control Study of Human Papillomavirus and ...

Epidemiology in Practice: Case-Control Studies

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Case-control studies also are used for diseases that have long latent periods (long durations between exposure and disease manifestation) and are ideal when multiple potential risk factors are at play. The primary challenge in designing a case-control study is the appropriate selection of cases and controls.

Epidemiology in Practice: Case-Control Studies

Case-control study | epidemiology | Britannica.com

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Case–control studies are therefore placed low in the hierarchy of evidence. Examples. One of the most significant triumphs of the case–control study was the demonstration of the link between tobacco smoking and lung cancer, by Richard Doll and Bradford Hill.

Case-control study | epidemiology | Britannica.com

Case–control study - Wikipedia

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5/26/2004 · I think it does. The standard index of risk calculated from case-control studies is the odds ratio (OR), whilst that from a cohort study is the relative risk (RR). Using incidence-density sampling in a case-control study is becoming more common, and makes it …

Case–control study - Wikipedia

What is a case-control study? | International Journal of ...

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PP11 Association between atopic disorders and childhood type 1 diabetes: A population-based case control study in the Middle East. A Memon, S Polack, M Al-Khawari, M Qabazard, A Al-Adsani, M Abdul-Rasoul, R Gulati, A Shaltout, A Suresh. J Epidemiol Community Health Sep 2014, 68 (Suppl 1) A51; DOI: 10.1136/jech-2014-204726.108 .

What is a case-control study? | International Journal of ...

Case-control studies | Journal of Epidemiology & Community ...

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Case-control studies. The same problem could also be studied in a case-control study. A case-control study begins with the selection of cases (people with a disease) and controls (people without the disease). The controls should represent people who would have been study cases if they had developed the disease (population at risk).

Case-control studies | Journal of Epidemiology & Community ...

Chapter 8. Case-control and cross sectional studies | The BMJ

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9/1/2004 · Epidemiologic studies have suggested that some dietary factors may play a role in the etiology of ovarian cancer, but the findings have been inconsistent. We assessed the association of ovarian cancer with dietary factors in a population-based case-control study in Canada. Diet information was collected on 442 incident cases of ovarian cancer diagnosed in 1994 to 1997 and 2,135 population ...

Chapter 8. Case-control and cross sectional studies | The BMJ

Cohort and Case-Control Studies: Pro's and Con's - The ...

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In this large case–control study in India, the prevalence of smoking was about 5% among women and 37% among men between the ages of 30 and 69 years. Smoking was associated with increased ...

Cohort and Case-Control Studies: Pro's and Con's - The ...

A Case-Control Study of Diet and the Risk of Ovarian ...

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2/1/2008 · The aim of the present study was to determine the risk of lung cancer associated with cannabis smoking. A case–control study of lung cancer in adults ≤55 yrs of age was conducted in eight district health boards in New Zealand. Cases were identified from the New Zealand Cancer Registry and hospital databases. Controls were randomly selected from the electoral roll, with frequency matching ...

A Case-Control Study of Diet and the Risk of Ovarian ...

Case–control studies: basic concepts | International ...

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5/16/2018 · A case-control study, like other medical research, can help scientists find new medications and treatments. Find out how 'cases' are compared with 'controls' in this type of study. This type of ...

Case–control studies: basic concepts | International ...

A Nationally Representative Case–Control Study of Smoking ...

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This multicentre case-control study across ten European and one Brazilian site replicates the strong effect of daily use of high-potency cannabis on the odds for psychotic disorder in the whole sample—which, to our knowledge, is the largest to date to address this question. This effect was particularly visible in London and Amsterdam.

A Nationally Representative Case–Control Study of Smoking ...

Cannabis use and risk of lung cancer: a case–control study ...

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8/7/2014 · Methods. Using the Finnish Job Exposure Matrix and the occupational history of 1,436 cases and 1,349 matched controls from an Australian case control study; we investigated five related exposure variables considered to be risk factors by comparing odds ratios.

Cannabis use and risk of lung cancer: a case–control study ...

Case-control study in medical research: Uses and limitations

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Description of a Case-Control Study A study design where the investigator identifies and selects patients who have the endpoint or outcome of interest (i.e., "cases") and also patients without the endpoint or outcome of interest (i.e., "controls") and looks back in time to identify exposures or characteristics that are linked to the cases.

Case-control study in medical research: Uses and limitations

The contribution of cannabis use to variation in the ...

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8/1/2015 · BACKGROUND AND OBJECTIVE: Recent evidence has linked childhood antibiotic use and microbiome disturbance to autoimmune conditions. This study tested the hypothesis that antibiotic exposure was associated with newly diagnosed juvenile idiopathic arthritis (JIA). METHODS: We performed a nested case–control study in a population-representative medical records database from …

The contribution of cannabis use to variation in the ...

A case control study investigating ... - Environmental Health

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1/3/2014 · Researchers investigated the risk factors associated with the development of pulmonary tuberculosis in Russia. A case-control study was performed in the city of Samara, 700 miles south east of Moscow. Cases were 334 consecutive adults diagnosed as having culture confirmed pulmonary tuberculosis at any of the city’s specialist tuberculosis clinics between 1 January 2003 and 31 …

A case control study investigating ... - Environmental Health

Case-Control Study: Biostatistics Overview

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Background. This study was done to assess the maternal and sociodemographic factors associated with low birth weight (LBW) babies. Methods. An unmatched case control study was done involving 159 cases (mothers having LBW singleton babies) and 159 controls (mothers having normal birth weight singleton babies). Results. More than 50% of LBW babies were from the mothers with height ≤145&# ...

Case-Control Study: Biostatistics Overview

Antibiotic Exposure and Juvenile Idiopathic Arthritis: A ...

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1/10/2017 · In high-income countries, the incidence of severe postpartum hemorrhage (PPH) has increased. This has important public health relevance because severe PPH is a leading cause of major maternal morbidity. However, few studies have identified risk factors for severe PPH within a contemporary obstetric cohort. We performed a case-control study to identify risk factors for severe …

Antibiotic Exposure and Juvenile Idiopathic Arthritis: A ...

Case-control studies: advantages and disadvantages | The BMJ

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How to Design and Conduct a Case Study. The advantage of the case study research design is that you can focus on specific and interesting cases. This may be an attempt to test a theory with a typical case or it can be a specific topic that is of interest. Research should be thorough and note taking should be meticulous and systematic.

Case-control studies: advantages and disadvantages | The BMJ

A Case Control Study on Risk Factors Associated with Low ...

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1/4/2013 · Objective Considering that epidemiological studies show that suicide rates in many countries are highest in the spring when vitamin D status is lowest, and that low vitamin D status can affect brain function, we sought to evaluate if a low level of 25-hydroxyvitamin D [25(OH)D] could be a predisposing factor for suicide. Method We conducted a prospective, nested, case-control study using serum ...

A Case Control Study on Risk Factors Associated with Low ...

Risk factors for severe postpartum hemorrhage: a case ...

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Background. Vietnam has a low age-standardized incidence of breast cancer, but the incidence is rising rapidly with economic development. We report data from a matched case-control study of risk factors for breast cancer in the largest cancer hospital in Vietnam. Methods. 492 incident breast cancer cases unselected for family history or age at diagnosis and 1306 control women age 25–75 ...

Risk factors for severe postpartum hemorrhage: a case ...
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