> All veterans who received Vitamin D2 (ergocalciferol) or Vitamin D3 (cholecalciferol) fills between 2010 and 2018 were separately identified and matched 1:1 t

> All veterans who received Vitamin D2 (ergocalciferol) or Vitamin D3 (cholecalciferol) fills between 2010 and 2018 were separately identified and matched 1:1 to untreated veterans on their propensity for supplementation I don't speak science journal. Does "propensity" mean "likelihood," here? I.e. is this saying that they attempted to mitigate that sort of selection bias by having the control group still be made up of people that take supplements (just not Vitamin D)?