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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
illness absence
Grammar usage guide and real-world examplesUSAGE SUMMARY
"illness absence" is correct and usable in written English.
You can use it to refer to an extended period of time away from a job, school, or other commitments due to an illness or medical condition. For example, you could say: "The employee had to take a long illness absence due to complications from the flu."
✓ Grammatically correct
Science
News & Media
Academia
Alternative expressions(20)
sick leave
disability leave
medical leave
duration of leave
length of leave
maternity leave
duration of absence
I applied for a leave
leave of absence
im on leave
i will be on leave on
you were on leave
due to health issue
happy leave
hope you are feeling better now
stay off work
I am on a leave
went home sick
i wish you a speedy recovery.
last minute vacation
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
13 human-written examples
Illness absence data are one of the major components of the HSS.
Science
11 13 A relatively small number of studies have attempted to examine the relationship between obesity and duration of illness absence.
Science
Illness absence will result in subsequent immunity to the virus, whereas those undertaking prophylactic absenteeism will still be vulnerable to infection.
Science
25 26 The HSS comprises demographic, work history, illness absence and physical examination (ie, health history, preplacement, periodic examinations) data for all US employees since 1978.
Science
Illness absence in a working population is a complex phenomenon including many factors, such as diet, physical activity, personal health risk factors and work-related factors.
Science
incompatibility of the clinical presentation with a known physical illness absence of relevant positive physical signs laboratory investigations not supporting a diagnosis of a physical illness.
Human-verified similar examples from authoritative sources
Similar Expressions
47 human-written examples
Hospital staff illness absences, on the other hand, are recorded all year around and within the NHS provide data on absence reasons.
Science
It also included the identification of subjects with a potential risk for developing illness and sickness absence.
In order to devise preventative steps, it is important to identify individuals at risk of symptoms of illness and sickness absence owing to work-related stress.
Science
In clinical trials in adults with chronic illnesses, absence from work is an important outcome, and we feel that an appropriate childhood equivalent would include measures of school attendance and other activities of daily living.
Science
Supplementary Figure S1 shows a model of a possible causal pathway between illness, unemployment and sickness absence.
Expert writing Tips
Best practice
Consider using the hyphenated form "illness-related absence" when the phrase acts as a modifier for another noun, such as in "illness-related absence rates".
Common error
Do not use "absence of illness" when you mean "illness absence". The former refers to being healthy or having no disease, while the latter refers to being away from school or work because you are sick.
Source & Trust
88%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
In grammatical terms, "illness absence" functions as a compound noun where "illness" acts as a noun adjunct modifying "absence". Based on data from Ludwig, this structure is used to create a specific category for non-attendance. It identifies the cause of the absence directly within the name of the event, which is vital for data tracking in clinical and sociological studies.
Frequent in
Science
75%
Academia
15%
News & Media
10%
Less common in
Social Media
2%
Informal Conversation
3%
Creative Writing
5%
Ludwig's WRAP-UP
In conclusion, "illness absence" is a precise and widely accepted term in scientific and professional English. According to Ludwig AI, it is particularly prevalent in public health research and labor economics, where it serves as a key metric for evaluating the impact of diseases—such as obesity or influenza—on workforce productivity. While it is synonymous with "sickness absence", its usage tends to be more analytical, focusing on the episodes and duration of missing work rather than the administrative leave itself. Writers should feel confident using this phrase in formal reports, academic papers and data-driven journalism to describe health-related non-attendance.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
sickness absence
Uses the term sickness which is more common in European labor statistics and administrative contexts
sick leave
Refers specifically to the authorized period of time off rather than the state of being absent
medical absence
Emphasizes the clinical or professional verification of the health issue
health-related absence
A broader descriptive term that covers everything from minor injuries to chronic conditions
absence due to illness
A more explicit prepositional phrase often used for clarity in formal documentation
illness-related absence
Uses a hyphenated modifier to link the cause directly to the absence event
morbidity-related absence
A highly technical term used in epidemiology and advanced health economics
disability leave
Usually refers to longer-term absences that may involve insurance claims or significant impairment
short-term illness
Focuses on the duration and nature of the health problem rather than the act of missing work
workplace absenteeism
Describes the general phenomenon of missing work, which includes but is not limited to illness
FAQs
Which is more common, "illness absence" or "sickness absence"?
While both are correct, "sickness absence" is more frequently used in official European labor statistics, whereas "illness absence" is common in American clinical research.
Can I use "sick leave" instead of "illness absence"?
Yes, but "sick leave" usually refers to the benefit or the allotted time off provided by an employer, whereas "illness absence" is used to describe the actual event or data point of being missing.
Is "illness absence" used for school or just work?
It can be used for both. In academic contexts, you might also see "health-related absence" or "absence from school" due to illness.
Is it "illness absence" or "illness-related absence"?
Both are acceptable. "illness absence" treats "illness" as a noun adjunct, while "illness-related absence" uses a compound adjective for more specific description.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.8/5
Expert rating
Real-world application tested