Twelve waves of binary caregiving status in the UK Household Longitudinal Study (n=25,049, roughly 2010 to 2023) were grouped by latent class analysis into eight trajectories, each related to four health behaviours measured at waves 7 to 13. Recurrent caregivers, 6.3% of carers, had higher adjusted odds of current smoking (OR 1.67, 95% CI 1.17 to 2.40) and lower odds of physical inactivity (OR 0.65) and problematic drinking (OR 0.75). Associations for the other trajectory classes were largely attenuated after adjustment for sociodemographic, health and baseline behavioural confounders.
Why it is interesting: Treats caregiving as a pattern over time rather than a fixed exposure, and finds the behavioural association with repeated transitions rather than with duration alone.