Absence of a Written Employment Contract and Health Outcomes Among Employed Adults in Chile

Precarious and informal employment has been increasingly recognized as a key social determinant of health, particularly in countries of the Global South. In Chile, despite relatively strong labor institutions, informal employment remains widespread, yet contemporary evidence on its health implications is limited. This study examines the association between the absence of a written employment contract, used as an indicator of labor informality, and multiple health and well-being outcomes among employed adults in Chile. A cross-sectional analysis was conducted using data from the nationally representative 2022-2023 National Health and Sexuality Survey (ENSEX), restricted to the urban employed population (<i>n</i> = 5193). Informal employment was defined by self-reported absence of a written contract. Health outcomes included perceived general health, quality of life, physician-diagnosed conditions, and recent anxiety-depressive symptoms assessed with the PHQ-4. Weighted descriptive analyses and logistic regression models were estimated, accounting for the complex survey design and adjusting for sex, age, and educational level. Approximately 12.8% of employed individuals reported not having a written contract. Contract absence was associated with higher odds of anxiety-depressive symptoms and lower odds of reporting good quality of life after adjustment. Associations with general health and chronic physical conditions were weaker and not statistically significant. These findings suggest that contractual informality is particularly linked to reduced psychological well-being and quality of life, highlighting the relevance of informal employment as a public health concern beyond traditional disease outcomes.