“Mean residual life (MRL) function defines the remaining life expectancy of a subject who has survived to a time point and is an important alternative to the hazard function for characterizing the distribution of a time-to-event variable.”

https://pubmed.ncbi.nlm.nih.gov/34553405/

“In survival or reliability studies, the mean residual life or life expectancy is an important characteristic of the model.”

https://www.sciencedirect.com/science/article...

“Quantile residual lifetime (QRL) is of significant interest in many clinical studies as an easily interpretable quantity compared to other summary measures of survival distributions. In cancer or other chronic diseases, treatments are often compared based on the distributions or quantiles of the residual lifetime.”

https://pubmed.ncbi.nlm.nih.gov/36593432/

Just my 2p

Lifetime is one word.

I agree that a term commonly used after cancer or other disease is “survival time” = Überlebenszeit.

“Residual life(time)” is a concept whose mathematics are way beyond my comprehension. It can be applied to virtually any technical component from light bulbs to washing machines to reinforced concrete structures, not to mention asset management.

With human beings, I think “residual life(time)” is used in mathematical or computer models and statistics but “(residual/remaining) life expectancy” in more general terms, so it depends on context and target readers.

Vasan RS, Beiser A, Seshadri S, Larson MG, Kannel WB, D’Agostino RB, Levy D

(2002) Residual life-time risk for developing hypertension in middle-aged men and

women: the Framingham Study. JAMA 297 1003-10.

Statistical Science 2016, Vol. 31, No. 4, 549–551

What Does “Propensity” Add? Jane Hutton

… we might well wish to model residual life time …

Effects Of Selection Bias And Competing Risks On Factors Determining Conversions To

Cognitive Impairments And Mixed Dementias F Richard J. Kryscio,

Results based on transition models using either a nonstationary Markov chain with absorbing states including interval censored deaths or joint models for the actual residual lifetime and the cognitive states will be summarized.

https://www.enar.org/meetings/spring2017/prog...

Two-Sample Tests for Quantile Residual Life Time

Yimeng Liu*, Abdus S. Wahed and Gong Tang, University of Pittsburgh

Sure, you'll find examples of "life time" as two words but, in the JAMA paper, "lifetime" is actually one word and not hyphenated:

"Residual Lifetime Risk for Developing Hypertension in Middle-aged Women and Men

The Framingham Heart Study JAMA. 2002;287(8):1003-1010

https://jamanetwork.com/journals/jama/fullart...

APA Dictionary of Psychology

morbidity risk

in epidemiology, the statistical chance that an individual will develop a certain disease or disorder. The probability is often expressed in terms of risk factors, using 1.0 as a base: The larger the number, the greater the morbidity risk.

This is the "technical" translation for Erkrankungsrisiko, isn't it?