The phrase "age middle" is not correct and not usable in written English.
It seems to be an attempt to describe a specific age range, but it lacks clarity and standard usage.
Example: "People in the age middle often face unique challenges in their careers and personal lives."
Alternatives: "middle age" or "midlife".
Beside the evaluation of the frequency of invasive COCA by the 17 'classic' 5-year age categories (0 4 years to 80 years and above) the changes of anatomic sub-site distribution in relation to 3 age groups young (<40 years of age), middle aged (40 69 years) and elderly (70 years and above) patients were analyzed.
The associations of the word "Midlands" itself are no better: fair to middling, stuck in the middle, middle age, middle management, midlife crisis.
I walk the streets, giving the women the once-over, especially the femmes d'un certain age, my age, middle age, to be precise.
The "average" MP tends to be, in McCarthy's words, "white, middle age, middle class, able bodied, cis-gendered, heterosexual, business-orientated, men".
A soulless sort might dismiss it as a dusty, musty funk, but to music lovers of a certain age (middle and up), it is a glorious bouquet, familiar to anyone who has ever dug through the crates.
THE CURIOUS CASE OF BENJAMIN BUTTON A child is born in New Orleans in 1918 with the features and internal organs of an old man; then, as time passes, his age declines until he goes through late middle age, middle age, youth, and so on, back toward infancy and death.
Wild-type fish groups (7 12 fish each) included young (1.2 years of age), middle-aged (2.1 years of age) and old (3.4 years of age) fish.
All calculations were stratified by gender and age: middle-aged 57-699 yeand) and older 70-86 yearss). 70-86 years
For the analysis, the donors' ages were grouped as follows: fetal (F), young (Y, birth to 30 years of age), middle-aged (M, 30 to 60 years of age), or old (O, over 60 years of age).
Five strata (young kids and lambs <6 months of age; middle-aged >6 months and <24 months of age vaccinated and unvaccinated groups; adults >24 months of age vaccinated and unvaccinated groups) were considered in this study for each of the two species (sheep and goats) investigated.
Being older in age, middle-ranged renal function and urinary protein excretion, and elevated serum IgA concentrations were also characteristic.
