Unmet Family Planning Need Globally: A Clarion Call for Sharpening Current Research Frame Works

Figures & data

Table 1 Similarities and Dissimilarities Among the Cohort-Historical; Life Course, and Life Course Epidemiological Models

Similarities
Cohort-historical vs Life Course Model.	Cohort-historical vs Life course Epidemiological Model.	Life Course Model vs Life Course Epidemiological Model.
Both models emphasize that an individual’s experiences are shaped by the social and historical context in which they live. They both recognize the importance of longitudinal data in understanding how individuals’ experiences change over time.	Both models emphasize the importance of shared experiences and common historical events among a group of individuals, while the life course model emphasizes the importance of individual experiences and transitions over time.	Both models view health as being shaped by an individual’s experiences and exposures over their lifetime. They both recognize the importance of social and environmental factors in shaping health outcomes, including things like income, education, and neighborhood conditions.
Dissimilarities
The cohort historical model focuses on understanding the impact of historical events on a particular cohort or generation, while the life course model focuses on understanding how individual experiences over their lifetime affect their health outcomes.	The cohort historical model tends to focus more on understanding broad historical trends, while the life course epidemiological model tends to be more focused on identifying and measuring specific exposures and outcomes.	The life course epidemiological model is more focused on identifying specific exposures and outcomes related to health, while the life course model is more focused on understanding how individual experiences over time contribute to health outcomes.
The cohort historical model emphasizes the importance of shared experiences and common historical events among a group of individuals, while the life course model emphasizes the importance of individual experiences and transitions over time.	The cohort historical model does not explicitly consider the biological and physiological changes that occur over the life course, while the life course epidemiological model takes these factors into account.	The life course model focuses on the timing of exposures and experiences over the course of a person’s life, while the life course epidemiological model emphasizes the accumulation of exposures and experiences over time.