Sampling (statistics) The sampling process comprises several stages: Successful statistical practice is based on focused problem definition.
In sampling, this includes defining the population from which our sample is drawn. A population can be defined as including all people or items with the characteristic one wishes to understand. Because there is very rarely enough time or money to gather information from everyone or everything in a population, the goal becomes finding a representative sample (or subset) of that population. Cambridge Journals Online - Abstract - Vitamin status in different groups of the Spanish population: a meta-analysis of national studies performed between 1990 and 1999.
ScienceDirect.com - Journal of Clinical Epidemiology - Development quality criteria to evaluate nontherapeutic studies of incidence, prevalence, or risk factors of chronic diseases: pilot study of new checklists. Www.cochrane-handbook.org. Appendix B: Data Extraction and Quality Assessment Forms - Manifestations and Management of Chronic Insomnia in Adults - NCBI Bookshelf. A systematic review of prevalence studies of depression in Parkinson's disease - Reijnders - 2007 - Movement Disorders - Wiley Online Library. Graphics.tx.ovid.com.ezproxy.webfeat.lib.ed.ac.uk/ovftpdfs/FPDDNCDCEDNNFJ00/fs046/ovft/live/gv025/00006250/00006250-200511000-00027.pdf. WHO systematic review of maternal mortality and morbidity: methodological issues and challenges. The worldwide incidence of preterm birth: a systematic review of maternal mortality and morbidity. SysRev3. Systematic review of prevalence studies of autism spectrum disorders. Cited Ref Search_WoK5. PRISMA. STROBE Statement: Home.
Www.strobe-statement.org/fileadmin/Strobe/uploads/checklists/STROBE_checklist_v4_cross-sectional.pdf. Www.sph.emory.edu/cms/departments_centers/gh/documents/reporting observational studies.pdf. Critical Appraisal of the Health Research Literature: Prevalence or Incidence of a Health Problem. Critical Appraisal of Studies 1.
The aims of this review are to systematically identify and collate studies describing the prevalence of schizophrenia, to summarize the findings of these studies, and to explore selected factors that may influence prevalence estimates.