Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
date of subject
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "date of subject" is not commonly used in written English and may cause confusion.
It could be used in contexts where you are referring to the date related to a specific subject or topic, but it is not standard terminology. Example: "Please provide the date of subject for the research paper to ensure we are referencing the correct timeline."
Science
News & Media
Alternative expressions(5)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
Subjects were followed until the earliest of the last data collection date at the practice, date of diagnosis of a cancer other than non-melanoma skin cancer, date of subject transfer out of the practice, date the practice lost its up-to-standard status or its link to HES or ONS data, date of record indicating institutional residence, date of death, or 31 December 2011.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
We report a study on brain tissue volumes in one of the largest cohorts of individuals studied to date of subjects with high mean age (mean ± standard deviation (SD) 76 ± 6 years).
Science
(3) To find the death dates of subjects, another registered catastrophic illness dataset was linked to identify the survival status of the target population and perform the analyses [ 17]. (4) ED utilization of those with a diagnosis of cancer was identified from the NHIRD, confirmed by the case type code [ 20].
Science
Briefly, population-based case control data from studies conducted in California, Minnesota, New York (excluding New York City, Texas and Washingtonn states (Reynolds et al, 2002; McLaughlin et al, 2006; Podvin et al, 2006; Puumala et al, 2008; Carozza et al, 2009) were pooled, with birth dates of subjects ranging from 1970 to 2004.
Science
To find something of this date, of this subject, of this importance is really a very notable moment".
News & Media
The analytical technique used is a generalization of the classical theory of acoustic horns, and a brief review of knowledge to date of this subject is first presented.
In the basic search, the results for the chosen keywords can be limited by the date of publication, subject area, and document type [ 28].
Science
For each case and control, the date and diagnostic code for all recorded hospital discharges or outpatient visits between 1977 and the index date of each subject were collected.
Science
Depending on the time interval between the installation of an ACVL pipe and the move-in date of a subject, varying the leaching rate should result in different exposure estimates.
To evaluate the total medical costs and to analyse the complications associated with pregnancy and delivery, the pregnancy period was estimated to be 10 months before the date of each subject's delivery.
Science
The date of each case subject's lung cancer diagnosis was defined as the index date.
Science
Expert writing Tips
Best practice
When using "date of subject", ensure the context clearly indicates what the date refers to (e.g., diagnosis, enrollment, birth) to avoid ambiguity. If possible, rephrase it to something more precise.
Common error
Avoid using "date of subject" without specifying which date is being referenced. Instead of saying "the date of subject", clarify with "the subject's enrollment date", for example. This improves clarity and prevents misinterpretation.
Source & Trust
84%
Authority and reliability
3.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "date of subject" functions as a noun phrase, typically acting as a modifier specifying a date related to a particular subject. It is often used to provide a temporal reference point in research or data collection. Ludwig AI considers this phrase as potentially confusing, and suggest to rephrase it for more clarity.
Frequent in
Science
65%
News & Media
15%
Formal & Business
10%
Less common in
Wiki
5%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
In summary, the phrase "date of subject" is used to refer to a relevant date associated with a subject, primarily in scientific, news and media contexts. Ludwig AI notes that it is acceptable but could be improved upon. While it is grammatically sound, greater precision often enhances clarity, such as specifying "subject's date of diagnosis" rather than just "date of subject". Related phrases include "subject's date" and "date pertaining to the subject", which offer alternative ways to express the same concept. When writing, it’s crucial to provide enough context to avoid ambiguity and potential misinterpretations.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
subject's date
This alternative directly links the subject to a specific date, implying a relevant date associated with that subject. The reordering of the words could provide better readability.
subject's reference date
Adding "reference" clarifies that the date is a point of reference in relation to the subject, offering increased precision. It implies that the date serves as a benchmark or point of comparison.
date pertaining to the subject
Using "pertaining to" emphasizes the relevance and connection between the date and the subject, adding a layer of formality. This might be suited for contexts where explicitness is needed.
relevant date for the subject
Using "relevant" highlights the importance of the date in relation to the subject, suggesting that it is a key date to consider. It is more explicit about the date's significance.
subject's index date
Substituting with "index" gives the sense of a specific date chosen to index the subject's relevant characteristics, often in studies. It's more technical.
date associated with the subject
This phrase emphasizes that there is a connection between the subject and that given date.
date for the subject matter
This refers to a date for the main topic or theme, implying that the subject is a topic of discussion or analysis.
date of the study participant
Using "study participant" specifies that you're talking about a person in a research study. More precise.
date regarding the individual
Employing "regarding the individual" focuses on a person and adds a formal tone, which may make it suitable for official or professional contexts.
date connected to the matter
Phrasing it this way suggests that the date has a direct relationship with the subject. This is a fairly generic expression.
FAQs
What does "date of subject" mean in research?
In research, "date of subject" typically refers to a significant date associated with a study participant, such as the date of diagnosis, enrollment, or a specific event relevant to the study. The precise meaning depends on the context of the research.
How can I make the phrase "date of subject" more specific?
To be more specific, replace "date of subject" with phrases like "subject's diagnosis date", "subject's enrollment date", or "subject's last follow-up date" depending on the specific date you are referencing.
Is "date of subject" formal or informal language?
"Date of subject" is neutral language but can sound slightly vague. In formal or scientific writing, it's better to use a more precise term like "subject's date of birth" or "subject's diagnosis date".
What's a good alternative to "date of subject" in medical contexts?
In medical contexts, alternatives include "date of diagnosis", "date of treatment initiation", or "date of last follow-up". These are more specific and provide clearer information.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
84%
Authority and reliability
3.8/5
Expert rating
Real-world application tested