The phrase "ascertained outside" is correct and usable in written English.
It can be used when referring to information or facts that have been determined or verified externally, outside of a particular context or location.
Example: "The results of the experiment were ascertained outside the laboratory to ensure accuracy."
Alternatives: "determined externally" or "verified outside".
As with so many of the bad things that happen in prison, it is hard to ascertain from the outside everything that led up to the murder of John J. Geoghan.
Causes of death were ascertained for patients who died outside a healthcare facility following a coroner post-mortem examination and this was also entered into the clinic database when the information became available.
The percentage (indices) of cells in each well that are outside of these thresholds is ascertained.
Outpatient care outside of the eight Philadelphia HCCs and hospitalizations outside of Pennsylvania were not ascertained.
The nature or purpose of documentation outside incident and medication-related documentation was not ascertained in this survey.
Birth weight and length could not be ascertained as birth records of the participants particularly those born outside hospitals were not available in this community-based setting.
The reasons for these cases remaining outside the TB programme are speculative and must be ascertained in the future.
SHS exposure was ascertained by asking about childhood exposures, exposure in the home, exposure outside of the home, and exposure in the workplace.
Non-responders were more likely to be known to be working in a Pacific Island state, and for the 16 where location could not be ascertained, it is plausible that a disproportionate number might have resided outside New Zealand.
Though proven systems are existing outside the study area, their presence is yet to be ascertained in the study area using the existing geological and geophysical knowledge.
