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CohortStudies

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Epidemiology Statistics Tutorial

Odds ratio can mislead if a "Common Event" is studied, since it can exaggerate effects. Relative risk is appropriate for randomized control studies and cohort studies.  
HelpHippo.com
over 5 years ago
Www.bmj
1
23

Non-parametric statistical tests for two independent groups: numerical data

Researchers described the outcomes at one year for a national cohort of infants with gastroschisis. A prospective cohort study design was used. Participants were 301 liveborn infants with gastroschisis between October 2006 and March 2008 from all 28 paediatric surgical centres in the United Kingdom and Ireland. The aim of the study was to describe outcomes at one year, comparing infants with simple gastroschisis (intact, uncompromised, and continuous bowel) with those with complex gastroschisis (bowel perforation, necrosis, or atresia). The main outcome measures included duration of parenteral nutrition and length of stay in hospital.1  
bmj.com
over 5 years ago
Www.bmj
1
28

Incretin based drugs and risk of acute pancreatitis in patients with type 2 diabetes: cohort study | The BMJ

Objectives To determine whether the use of incretin based drugs, compared with sulfonylureas, is associated with an increased risk of acute pancreatitis. - currently located behind a paywall. Your institution may have access through Athens/Elservier or similar.  
bmj.com
over 5 years ago
Www.bmj
1
53

Incretin based drugs and risk of acute pancreatitis in patients with type 2 diabetes: cohort study

Objectives To determine whether the use of incretin based drugs, compared with sulfonylureas, is associated with an increased risk of acute pancreatitis.  
bmj.com
over 5 years ago
Www.bmj
1
20

Use of population based background rates of disease to assess vaccine safety in childhood and mass immunisation in Denmark: nationwide population based cohort study

Objectives To predict the number of selected outcomes temporally associated but not caused by vaccination, to aid causality assessment of adverse events arising after mass immunisation in a paediatric population.  
bmj.com
over 5 years ago
Www.bmj
1
26

Neurological and autoimmune disorders after vaccination against pandemic influenza A (H1N1) with a monovalent adjuvanted vaccine: population based cohort study in Stockholm, Sweden

Objective To examine the risk of neurological and autoimmune disorders of special interest in people vaccinated against pandemic influenza A (H1N1) with Pandemrix (GlaxoSmithKline, Middlesex, UK) compared with unvaccinated people over 8-10 months.  
www.bmj.com
over 5 years ago
Static.www.bmj
1
18

Influence of blood prostate specific antigen levels at age 60 on benefits and harms of prostate cancer screening: population based cohort study

Objective To determine the relative risks of prostate cancer incidence, metastasis, and mortality associated with screening by serum prostate specific antigen (PSA) levels at age 60.  
bmj.com
over 5 years ago
Preview
0
23

Medical Education in the Caribbean: A Longitudinal Study of... : Academic Medicine

Purpose: Caribbean-educated physicians play an important role in the United States. The purpose of t  
journals.lww.com
over 5 years ago
Www.bmj
1
14

Non-parametric statistical tests for two independent groups: numerical data

Researchers described the outcomes at one year for a national cohort of infants with gastroschisis. A prospective cohort study design was used. Participants were 301 liveborn infants with gastroschisis between October 2006 and March 2008 from all 28 paediatric surgical centres in the United Kingdom and Ireland. The aim of the study was to describe outcomes at one year, comparing infants with simple gastroschisis (intact, uncompromised, and continuous bowel) with those with complex gastroschisis (bowel perforation, necrosis, or atresia). The main outcome measures included duration of parenteral nutrition and length of stay in hospital.1  
bmj.com
over 5 years ago
Preview
1
14

Dietary fiber intake and mortality among survivors of myocardial infarction: prospective cohort study

Objective To evaluate the associations of dietary fiber after myocardial infarction (MI) and changes in dietary fiber intake from before to after MI with all cause and cardiovascular mortality.  
bmj.com
over 5 years ago
Preview
2
39

Dietary fiber intake and mortality among survivors of myocardial infarction: prospective cohort study

Objective To evaluate the associations of dietary fiber after myocardial infarction (MI) and changes in dietary fiber intake from before to after MI with all cause and cardiovascular mortality.  
bmj.com
over 5 years ago
Preview
1
18

Relation of physical activity time to incident disability in community dwelling adults with or at risk of knee arthritis: prospective cohort study

Objective To investigate whether objectively measured time spent in light intensity physical activity is related to incident disability and to disability progression.  
bmj.com
over 5 years ago
Preview
1
15

Dietary fiber intake and mortality among survivors of myocardial infarction: prospective cohort study

Objective To evaluate the associations of dietary fiber after myocardial infarction (MI) and changes in dietary fiber intake from before to after MI with all cause and cardiovascular mortality.  
www.bmj.com
over 5 years ago
Preview
1
29

Relation of physical activity time to incident disability in community dwelling adults with or at risk of knee arthritis: prospective cohort study

Objective To investigate whether objectively measured time spent in light intensity physical activity is related to incident disability and to disability progression.  
bmj.com
over 5 years ago
Static.www.bmj
1
13

Influence of healthy candidate bias in assessing clinical effectiveness for implantable cardioverter-defibrillators: cohort study of older patients with heart failure

Objective To assess the potential contribution of unmeasured general health status to patient selection in assessments of the clinical effectiveness of implantable cardioverter-defibrillator (ICD) therapy.  
bmj.com
over 5 years ago
Www.bmj
1
18

Relation between surgeon volume and risk of complications after total hip arthroplasty: propensity score matched cohort study

Objectives To identify a cut point in annual surgeon volume associated with increased risk of complications after primary elective total hip arthroplasty and to quantify any risk identified.  
bmj.com
about 5 years ago
Preview
1
34

Event medicine: injury and illness during an expedition-length adventure race ☆

To describe the incidence and type of injury and illness occurring during an expedition-length adventure race and identify those resulting in withdrawal from the event, a prospective cohort study was conducted of the injuries and illness treated during the Subaru Primal Quest Expedition Adventure Race™ held in Colorado July 7–16, 2002. All racers, support crewmembers, and race staff were eligible to participate in the study. When a member of the study group received medical care due to an injury or illness, the encounter was recorded on a Medical Encounter Form. If an injury or illness resulted in withdrawal from the race, this was also recorded. Information from the Medical Encounter Forms was used to generate the Medical Log. There were 671 individuals eligible to participate in the study. A total of 243 medical encounters and 302 distinct injuries and illnesses were recorded. There were 179 (59%) injuries and 123 (41%) illnesses. Skin and soft tissue injuries and illness were the most frequent (48%), with blisters on the feet representing the single most common (32.8%). Second was respiratory illness (18.2%), including upper respiratory infection, bronchitis and reactive airway disease-asthma. Respiratory illness was the most common medical reason for withdrawal from the event. Injuries accounted for almost 60% of all injury and illness yet they contributed to less than 15% of the medical withdrawals from the race. Blisters accounted for almost one-third of all conditions treated. Providers of medical support for expedition-length adventure races should be prepared to treat a wide variety of injury and illness.  
sciencedirect.com
about 5 years ago
Www.bmj
1
17

Trajectories of risk after hospitalization for heart failure, acute myocardial infarction, or pneumonia: retrospective cohort study

Objective To characterize the absolute risks for older patients of readmission to hospital and death in the year after hospitalization for heart failure, acute myocardial infarction, or pneumonia.  
bmj.com
over 4 years ago
Www.bmj
1
16

Antidepressant use and risk of suicide and attempted suicide or self harm in people aged 20 to 64: cohort study using a primary care database

Objective To assess the associations between different antidepressant treatments and the rates of suicide and attempted suicide or self harm in people with depression.  
bmj.com
over 4 years ago
Www.bmj
0
13

Impact of smoking and smoking cessation on cardiovascular events and mortality among older adults: meta-analysis of individual participant data from prospective cohort studies of the CHANCES consortium

Objective To investigate the impact of smoking and smoking cessation on cardiovascular mortality, acute coronary events, and stroke events in people aged 60 and older, and to calculate and report risk advancement periods for cardiovascular mortality in addition to traditional epidemiological relative risk measures.  
feeds.bmj.com
over 4 years ago