Accurate and reliable data collection methods are essential for high-quality epidemiological research. Researchers must ensure that data is collected consistently and systematically to avoid measurement errors. The use of validated data collection instruments and trained personnel can enhance data quality.
Furthermore, the source of data is important. Data can be derived from primary sources, such as surveys and interviews, or secondary sources, like healthcare records and national databases. Each source has its potential for error and bias, which must be accounted for during analysis.
