《Aging & Mental Health》的一项新的纵向研究增加了证据，显示孤独与较差的老年人记忆有关。研究人员表示，这种关联很明确，但这并不一定意味著孤独者的大脑老化得更快。相反，孤独似乎与基线时较弱的即时回忆和延迟回忆有关，这引发了对社会隔离如何在晚年塑造认知的疑问。

利用来自 SHARE 的数据，团队在6年内追踪了12个欧洲国家的10,217名65岁至94岁成年人。他们发现，年龄是影响记忆水平和衰退的最强因素：分数从75岁起下降得更快，并在85岁后下降得更明显。抑郁症以及糖尿病等慢性疾病会降低初始记忆分数，孤独也会降低起点，但它并不会加剧衰退速度。每月至少一次进行中等或剧烈身体活动的人能回忆起更多单词，且基线记忆更好，不过其衰退速度未变。

这些发现表明，孤独对记忆的初始状态影响大于其进展，因此它是公共卫生和老龄化政策的重要目标。研究还指出，可能的路径包括社交互动减少、抑郁风险上升，以及高血压和糖尿病等疾病负担加重。联合国预测显示，到2050年，全球每6人中就有1人将超过65岁；文章因此认为，即使孤独本身并不会随时间加速记忆丧失，认知衰退、失智症和其他与年龄相关的疾病也将成为更大的医疗挑战。

A new longitudinal study in Aging & Mental Health adds evidence that loneliness is tied to poorer memory in older adults. Researchers say the connection is clear, but it does not necessarily mean lonely people’s brains age faster. Instead, loneliness appears to be linked to weaker immediate and delayed recall at baseline, raising questions about how social isolation shapes cognition in later life.

Using data from SHARE, the team followed 10,217 adults aged 65 to 94 across 12 European countries for 6 years. They found that age was the strongest driver of memory level and decline: scores fell more quickly from age 75 and more sharply after 85. Depression and chronic illnesses such as diabetes lowered initial memory scores, and loneliness also reduced the starting point, but it did not steepen the rate of decline. People doing moderate or vigorous physical activity at least once a month recalled more words and had better baseline memory, though their decline rate was unchanged.

The findings suggest loneliness affects the initial state of memory more than its progression, making it an important target for public health and aging policy. The study also points to possible pathways through reduced social interaction, higher depression risk, and greater burdens of conditions such as hypertension and diabetes. With United Nations projections indicating that 1 in 6 people worldwide will be over 65 by 2050, the article argues that cognitive decline, dementia, and other age-related diseases will become a much larger health-care challenge, even if loneliness itself does not speed memory loss over time.