The phrase "assessed only once" is correct and usable in written English.
It can be used in contexts where you want to indicate that something will be evaluated a single time without repetition.
Example: "The project will be assessed only once at the end of the semester to determine its overall effectiveness."
Alternatives: "evaluated a single time" or "reviewed just once".
Of the carriers, 449 had undergone neuropsychological testing; 140 (31%) were assessed only once, whilst the remainder had serial assessments (average 3.2 assessments, range 1 to 12) at intervals ranging from 1 to 11 years (mean 2.1 years).
Diet was assessed only once at baseline, as opposed to repeated assessments during follow-up, therefore we were not able to examine the changes in fat intake over time.
Although CMS has mandated the assessment of HRQOL and patient experience, these PRMs are most often assessed only once or twice for each patient.
As an individual plot is assessed only once, treatment bias is not an issue.
In-situ assessments can be based on 1) permanent plots, which are assessed on all successive occasions, 2) temporary plots, which are assessed only once, and 3) a combination of both.
But in those studies, income is typically assessed only once, which is problematic.
Finally, we assessed patients only once a day for delirium, and patients who were CAM-ICU negative were considered to be "free of brain dysfunction" for the entire day.
We assessed alcohol consumption only once at inclusion.
Often, employers assess employee risk only once - at the time of hire.
Each patient that agrees to take part will be assessed once only by a research physiotherapist (one at each participating centre).
In most studies, drug use was assessed once only, typically by asking subjects about their average intake over a period of time, which ranged from 30 days (Schreinemachers and Everson, 1994) to 5 years (Irani et al, 2002), prior to interview or diagnosis.
