Impact of transient and chronic loneliness on progression and reversion of frailty in community-dwelling older adults: four-year follow-up.

Roughly the same percentage, a fifth, of older Chinese adults progressed or reversed in frailty status without active intervention. Chronic loneliness was related to a lower probability of reversion in the frail group than in the no loneliness group, but not in the transient loneliness group. More attention should be given to older adults with chronic loneliness.