Cross-sectional and longitudinal predictors of quality of life in autistic individuals from adolescence to adulthood: The role of mental health and sleep quality.

Costa et al. (2020) followed autistic and non-autistic teens and adults for two years. They asked how depression, sleep, and other health signs shape quality of life over time.

The team used surveys and health checks at the start and again two years later. They wanted to see which factors best predict life satisfaction in autistic people.

Depression, poor sleep, and low psychological well-being all dragged down quality of life in both groups. The drop looked the same for autistic and non-autistic people.

The biggest clue to later life satisfaction was earlier life satisfaction. In the autistic group, how they felt at baseline mattered most two years on.

Bishop et al. (2023) extend the sleep link. They show poor sleep also raises heart-disease risk in autistic adults, so fixing sleep may help body and mind together.

Young et al. (2025) and Gotham et al. (2015) warn that common depression scales often miss the mark in autistic youth. This looks like a clash, but it isn’t: P et al. used the same scales yet still found depression mattered. The take-away: scores can still predict quality of life, yet clinicians should interpret them cautiously and add autism-friendly tools when possible.

Lamash et al. (2025) conceptually replicate the focus on psychosocial drivers. While P et al. point to depression and sleep, Liron shows autism identity acceptance also lifts teen quality of life. Both studies agree: mental-life factors outweigh IQ or behavior alone.

You can’t fix quality of life by targeting only behavior. Screen for depression at intake, add a short sleep diary or actigraphy week, and treat both together. When goals clash—say, a stimulant improves focus but hurts sleep—pause and weigh the sleep cost. Tracking these two areas gives you the biggest leverage for happier, healthier autistic teens and adults.