longitudinal studies造句

Subanalysis of three longitudinal studies showed a stronger effect: the or for underweight was 2.2 (95% CI: 1.5-3.2) and for stunting, 2.0 (95% CI: 1.0-3.9).

That's not to say it doesn't exist, just that the methods, scientific definitions and longitudinal studies necessary to view any of this historically remain a work in progress.