Acres to Hectares Conversion. There are 0.404685642 hectares in an acre. In other words, it is about 40 percent of a hectare. To find out how many hectares in acres, multiply by the conversion factor or instead, use the converter below. Acre is an imperial and US customary area measurement unit which equals to 43560 square feet.
intervention study. testing an hypothesized epidemiological cause-effect relationship by intervening in a population and modifying a supposed causal factor and measuring the effect of the change.
Updated 10/1/2014 NOTE: Study Guides may be updated at any time. VASCULAR/INTERVENTIONAL STUDY GUIDE. Note: The examination for those who are recertifying their subspecialty certificate (CAQ) in interventional. radiology and for those who choose three to four modules in interventional radiology will have greater depth. and breadth than the examination for those choosing one to two modules. ï· Vascular diagnosis.