The phrase "ascertained during a" is correct and usable in written English.
It can be used when referring to information or findings that were determined or discovered within a specific context or timeframe.
Example: "The results were ascertained during a comprehensive review of the data collected over the past year."
Alternatives: "determined during a" or "established during a".
Measurements for weight, height, waist, and hip were ascertained during a baseline physical examination.
The criteria are ascertained during a telephonic interview by a trained psychologist.
There were 99 incident diabetes events ascertained during a median follow-up of 3 years (range 2 4.5 years).
The presence of the algorithms was ascertained during a period between patient cohort entry and 31 December 2012.
Six hundred and eighty-one incident colorectal cancer cases were ascertaincidenting a median follow-up of 11.4 years.
The content validity is ascertained during a qualitative phase which includes a literature search, interviews with experts, and patient focus groups.
The aim of this study was to assess similarities and differences between methods of performance comparisons under binary (yes or no) and receiver-operating characteristic (ROC type pseudocontinuous (0 100) rating data ascertained during an observer performance study of interpretation of full-field digital mammography (FFDM) versus FFDM plus digital breast tomosynthesis.
Using data from a large cohort of Canadian women, we examined the association of dietary intake of these nutrients, as well as intake of folate, methionine, and alcohol, with cancers of the breast, endometrium, ovary, colorectum, and lung ascertained during an average of 16.4 years of follow-up.
All incident cases (< 15 years of age) were ascertained during 1990 2005 within a 5-km radius of the Krümmel nuclear power plant.
Finally, we show how the correctness of hypothesised types can be ascertained during the interaction via an automated statistical analysis.
Potential risk factors for preeclampsia were ascertained during in-person postpartum interviews using a structured questionnaire and by medical record abstraction.
