Introduction to Observational Population

What is/are Observational Population?

Observational Population - Material and methods: 20 year-observational population-based historical cohort study (2001–2020). ^[1] We conducted an observational population-based cohort study using the Health Insurance Review and Assessment databases, which contain information about the use of medicines in South Korea. ^[2] Methods We used data from The Maastricht Study, an observational population‐based cohort that comprises individuals with normal glucose metabolism, prediabetes, or type 2 diabetes. ^[3] Material and methods: 20 year-observational population-based historical cohort study (2001-2020). ^[4] This was an open-label, single-centre, observational population pharmacokinetic and descriptive pharmacodynamic evaluation study. ^[5] We included participants of The Maastricht Study, an observational population-based cohort, who underwent at least 48 h of continuous glucose monitoring (CGM) (n = 853; age: 59. ^[6] METHODS This observational population-based study included all term and near-term infants with hypothermia-treated HIE born between 2007-2009 in greater Stockholm. ^[7] Observational population-based cohort study using state-wide linked longitudinal health data for adults with IgAV (n=267) and matched controls (n=1080) between 1980-2015. ^[8] MATERIALS AND METHODS This was a retrospective, observational population-based cohort study of patients admitted to government-funded family medicine clinics in Hong Kong between January 1, 2000 and March 31, 2002 with at least 3 blood pressure measurements. ^[9] In an observational population-based study in Norway (pop ≥ 5 years, 2009–2017) covering six years post-PCV13 implementation, we explored the incidence and risk of IPD associated with age and comorbidities. ^[10] This observational population-based study examines intentions to be vaccinated against COVID-19 throughout the pandemic. ^[11] METHODS FRONTIERS is a European prospective, observational population study based on multinational registries. ^[12] DESIGN Observational population-based cohort study using electronic laboratory and register data. ^[13] Methods: Observational population-based cohort study in children (6mo. ^[14] METHODS Observational population-based cohort study using state-wide linked longitudinal health data for hospitalised adults with IgAV (n = 267) and matched comparators (n = 1080) between 1980-2015. ^[15] DATA/SOURCES Inclusion criteria were observational population-based studies reporting the prevalence or raw data of dental fear in adults (>18 years). ^[16] Methods: We conducted a retrospective, observational population-based cohort study to assess treatment patterns and outcomes of patients with de-novo MBC who received radiotherapy for intracranial metastatic disease between January 2009 and December 2018. ^[17] In this observational population-based cohort study, we examined longitudinal changes in psychological distress associated with testing positive for COVID-19. ^[18] Methods Cross-sectional data were used from the observational population-based cohort of The Maastricht Study. ^[19] In this observational population-based cohort study, we examined longitudinal changes in psychological distress associated with testing positive for coronavirus disease 2019 (COVID-19). ^[20] Majority were observational population-based cohort studies or meta-analysis of them. ^[21] Methods Within the observational population-based cohort of the Rotterdam Study, we included participants who visited the research centre for a cognitive assessment between March 2, 2009, and March 1, 2012. ^[22]

cross sectional study

An observational population based cross-sectional study was conducted in five sub-cities of Addis Ababa. ^[1] Methods This research is part of the Khuzestan Comprehensive Health Study (KCHS), a large observational population-based cross-sectional study in which 30,041 participants aged 20 to 65 were enrolled. ^[2] Methods: This research is part of the Khuzestan Comprehensive Health Study (KCHS), a large observational population-based cross-sectional study in which 30041 participants aged 20 to 65 were enrolled. ^[3]

Retrospective Observational Population

Retrospective observational population-based study with matched cohorts. ^[1] METHODS We conducted a retrospective observational population study using linked health data in patients undergoing percutaneous coronary intervention (2012-2017). ^[2] Methods: In a retrospective observational population-based study, a total of 329 older hospitalized patients from Zhejiang Hospital in China were enrolled and completed 1-year follow-up. ^[3] Methods This is a retrospective observational population study consisting of 3918 participants enrolled in primary, secondary, and university in China. ^[4] Methods In a retrospective observational population-based quality registry study covering a population of 1. ^[5] Method and Results We studied 2090 patients (2011–2015) who were recommended for clopidogrel for 12 months (+aspirin) post–percutaneous coronary intervention within a retrospective observational population cohort. ^[6] Methods: A retrospective observational populational study was conducted analysing the national database that includes the Minimum Basic Data Sets (MBDSs) of admissions of RA patients to an ICU during the 2005-2015 period. ^[7] Design: Retrospective observational population-based study enrolled patients during years 2004–2011 with 1-year follow-up. ^[8]

An Observational Population

Methods An observational population-based cohort study of the Norwegian National Addison Registry. ^[1] An observational population based cross-sectional study was conducted in five sub-cities of Addis Ababa. ^[2] METHODS AND RESULTS An Observational population-based study on consecutive GEP-NEN patients diagnosed from 2003 to 2013, managed according to national guidelines. ^[3] An observational population-based study using the HemoBase registry was performed, including all patients with MDS diagnosed between 2005 and 2017 in Friesland, a Dutch province. ^[4] An observational population-based epidemiological study with selection of participants was carried out based on the information collected in the corresponding clinical histories of the basic health area of Arturo Eyries. ^[5]

Prospective Observational Population

AIMS We describe a 22-year prospective observational population-based study that determined the prevalence and incidence of type 2 diabetes (T2D) and intermediate hyperglycaemia (IH), obesity, hypertension, and disorders of lipid metabolism in a middle-age population in the Finnish municipality of Savitaipale. ^[1] METHODS AND RESULTS This was a prospective observational population-based cohort study, based on physical examinations and questionnaires at baseline supplemented with national register data between 2005 and 2015. ^[2] MethodsThis was a prospective observational population pharmacokinetic study in critically ill adult patients with presumed/confirmed invasive fungal infection. ^[3]

Large Observational Population

Methods This research is part of the Khuzestan Comprehensive Health Study (KCHS), a large observational population-based cross-sectional study in which 30,041 participants aged 20 to 65 were enrolled. ^[1] Methods: This research is part of the Khuzestan Comprehensive Health Study (KCHS), a large observational population-based cross-sectional study in which 30041 participants aged 20 to 65 were enrolled. ^[2] In patient safety, studies on interventions (using randomisation) are less common than large observational population studies of the incidence and causes of medical errors, and the number of RCTs and systematic reviews of randomised trials published in specialised journals are scarce. ^[3]

Longitudinal Observational Population

METHODS We did a longitudinal observational population study with data from the English Longitudinal Study of Ageing, a nationally representative sample of older men and women. ^[1] Design and setting Longitudinal observational population study using data from Waves 2 (2004/2005) through 8 (2016/2017) of the English Longitudinal Study of Ageing, a prospective study of community-dwelling older adults in England. ^[2]

observational population study

However, little is known regarding the effects in the next generation following treatment in pregnancy beyond observational population studies that examined rates of birth defects and developmental delays. ^[1] METHODS FRONTIERS is a European prospective, observational population study based on multinational registries. ^[2] METHODS We conducted a retrospective observational population study using linked health data in patients undergoing percutaneous coronary intervention (2012-2017). ^[3] Methods This is a retrospective observational population study consisting of 3918 participants enrolled in primary, secondary, and university in China. ^[4] Four case reports plus our own 2 case reports, and 2 observational population studies. ^[5] In patient safety, studies on interventions (using randomisation) are less common than large observational population studies of the incidence and causes of medical errors, and the number of RCTs and systematic reviews of randomised trials published in specialised journals are scarce. ^[6] An interpretation of observational population studies as showing a protective effect of alcohol on CWP is not supported. ^[7] METHODS We did a longitudinal observational population study with data from the English Longitudinal Study of Ageing, a nationally representative sample of older men and women. ^[8] Design and setting Longitudinal observational population study using data from Waves 2 (2004/2005) through 8 (2016/2017) of the English Longitudinal Study of Ageing, a prospective study of community-dwelling older adults in England. ^[9]

observational population pharmacokinetic

This was an open-label, single-centre, observational population pharmacokinetic and descriptive pharmacodynamic evaluation study. ^[1] MethodsThis was a prospective observational population pharmacokinetic study in critically ill adult patients with presumed/confirmed invasive fungal infection. ^[2] Observational population pharmacokinetic analysis demonstrated that inter-individual variability on voriconazole clearance was >100% CV, and clearance increased with age. ^[3]