Reaching the milestone of one hundred years of age does not automatically equate to a life overshadowed by illness. According to new research from Karolinska Institutet, those who live to become centenarians not only enjoy longer lives but also tend to remain in better health than their peers, with fewer diseases that emerge at a slower pace.
Published in eClinicalMedicine, the study compared individuals who lived to 100 with those who died earlier. The findings reveal that centenarians carry a lighter disease burden overall, and when illnesses do appear, they progress more gradually. Unlike many older adults who accumulate multiple diagnoses in their final years, centenarians often maintain a more stable health profile from around the age of 90 onwards. Typically, they experience conditions confined to a single organ system, with a notably lower frequency of overlapping illnesses.
One of the more striking results concerns cardiovascular disease, which is not only rarer among centenarians but also tends to develop later in life. Similarly, neuropsychiatric disorders are less prevalent in those who achieve extreme longevity. These patterns indicate that centenarians are not merely prolonging the inevitable course of ageing; instead, they follow a distinctive trajectory marked by resilience against some of the most common age-related conditions.
“Our results challenge the prevailing assumption that a longer life is synonymous with an extended period of poor health,” explains Karin Modig, associate professor at the Institute of Environmental Medicine, Karolinska Institutet, and senior author of the study. “Centenarians demonstrate a unique ageing curve, where disease progression slows down and resistance to age-related disorders is heightened.”
The investigation drew on the entire Swedish birth cohort of 1920 to 1922, encompassing over 270,000 individuals. Researchers monitored the participants’ health records from the age of 70 for up to three decades, using national health registers to track the development and progression of disease. The analysis revealed that centenarians not only postpone the onset of illness but also seem to age in a way that sets them apart fundamentally from those with shorter lifespans.
“Exceptional longevity is not simply about avoiding sickness until later years,” Modig continues. “It represents a distinctive biological pathway of ageing. The data suggest that centenarians maintain homeostasis and a remarkable resistance to disease despite the usual wear and tear of ageing—a phenomenon that may stem from a fortunate interplay of genetics, lifestyle choices, and environmental factors.”
More information: Karin Modig et al, Disease accumulation and distribution across the lifespan in Swedish centenarians and non-centenarians: a nationwide life course comparison of longevity and health resilience, EClinicalMedicine. DOI: 10.1016/j.eclinm.2025.103396
Journal information: EClinicalMedicine Provided by Karolinska Institutet
