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What Causes What
LOOP+ INCREASES

Depression → Loneliness

Higher depression increases loneliness.

Depression predicts later loneliness. In follow-up studies of middle-aged and older adults, depressive symptoms tracked with more loneliness years later, the other half of the loop with loneliness predicting depression.

Longitudinal / panel · Moderate

Each side influences the other.

Mechanism

Two studies measured both states more than once. In adults aged 50 to 67 in Cook County, latent growth models found reciprocal influences between depressive symptoms and loneliness. In adults over 50 in 12 European countries, a cross-lagged analysis found depression predicting loneliness two years later in both men and women. The papers suggest low mood pulls people back from contact, but they do not test a pathway.

Caveats

This is observational follow-up, so it says depression comes before later loneliness, not that it causes it. Illness, money and sleep can drive both. A review of studies in children and adolescents also lists depression among risk factors for later loneliness, while noting that few studies gave strong evidence. This is a journal entry, not medical advice.

Effect

No single effect size: the studies report positive links in both directions over time.

Nodes

MindDepressionRelationshipsLoneliness

Named confounders

Cite this page

What Causes What. “Depression → Loneliness.” https://whatcauseswhat.org/edges/e-depression-loneliness (atlas updated 2026-10-17).

https://whatcauseswhat.org/edges/e-depression-loneliness

Papers