RESEARCH METHODOLOGY

Detailed explanation-1: -Cohort sampling: Both cohort sampling and panel sampling are used to study changes over time, but they are not exactly the same. While studies that use panel sampling follow the same groups of individuals, studies that use cohort sampling follow a cohort, but not necessarily the same individuals every time.

Detailed explanation-2: -In a cohort study, the participants do not have the outcome of interest to begin with. They are selected based on the exposure status of the individual. They are then followed over time to evaluate for the occurrence of the outcome of interest.

Detailed explanation-3: -Population-based studies may include a variety of study types. They may include case–control studies, cross-sectional studies, twin studies, or prospective and retrospective cohort studies.

Detailed explanation-4: -The disadvantage of a prospective cohort study may be the long follow-up period while waiting for events or diseases to occur. Thus, this study design is inefficient for investigating diseases with long latency periods and is vulnerable to a high loss to follow-up rate.