What about Observational Studies? Do the statuses of On Follow Up, On Treatment and Off Treatment apply to these studies?

What about Observational Studies? Do the statuses of On Follow Up, On Treatment and Off Treatment apply to these studies?

On Treatment, On Follow Up and Off Treatment don’t necessarily apply to all studies. For example, subjects on observation studies may directly progress from On Study to Off Study without being marked as On Treatment, Off Treatment or Follow Up.