"until old age" is correct and can be used in written English.
You can use it to indicate when something will end or the length of time something will last. For example: "Her dedication to learning was unwavering until old age."
The progress of civilization (especially 60 years ago) allowed slow-aging individuals to survive until old age, emerging as healthy centenarians now.
The things which the child loves remain in the domain of the heart until old age.
Until old age and illness overcame him, he was ferociously and competitively alive.
Smilingly, she kissed it; and, until old age, the most wonderful Voice in a generation never deserted her.
Michelangelo kept them until old age, when he gave them to a family that had helped him during an illness; they are now in the Louvre.
That made it seem absurd to leave his philanthropy until old age, as he had previously intended.A lot of giving is stimulated by personal experience.
The share of the population surviving until older age is increasing, to reflect changes in longevity.
On the other hand, brain plasticity may induced by extensive learning of medical students (Bosma et al. 2002), and it may happen until older age (Karp et al. 2006), yielding good physiological perspectives for long life learning (Bosma et al. 2002; Karp et al. 2006; Wilson et al. 2002), which is an important feature of keeping up professional medical competences.
In fact, percutaneous procedures can extend treatment to the increasing population of elderly patients with severe comorbidities who cannot withstand the stress of open heart surgery and to the younger patients at the early stage of valve disease, who are not treated until older ages to avoid multiple invasive surgeries.
In our discussion, we do not discuss the impact of removing the restrictions on hazardous work and the worst forms of child labor that persist until older ages, because we do not have data on time allocation at older ages and generally those restrictions are on less prevalent work.
That is, the Rich and the Middle-class women gained more fitness benefits through continuing reproduction until older ages than the women in the Poor wealth class.
