Food insecurity and the use of coping strategies on multimorbidity, anxiety and depression in South African adults: A nationally representative study.

OBJECTIVE

To assess the associations between food insecurity, coping strategies, socio-economic status and anxiety, depression and multimorbidity in South Africa.

METHODS

Data from a nationally representative cross-sectional survey conducted in April 2024 (n = 3171; weighted to 20,955,234 adults aged > 18 years) were used. Food insecurity was measured using the Community Childhood Hunger Identification Project (CCHIP) tool, a validated household-level measure commonly used in South Africa. Coping strategy, anxiety and depression were measured using the coping strategies index, Generalised Anxiety Disorder-7 scale and Patient Health Questionnaire-9, respectively. Multimorbidity was self-reported as ≥2 of 14 known chronic conditions. Multivariable logistic regression was used to test associations, and a generalised structural equation model examined the roles of socio-economic status and coping strategies.

RESULTS

Being from a food-insecure household more than doubled the odds of experiencing multimorbidity (OR=2.17, 95% CI 2.17, 2.19), depression (OR=2.96, 95% CI 2.95, 2.97) and anxiety (OR=2.82, 95% CI 2.81, 2.83). Food insecurity accounted for approximately 60% of the total association between socio-economic status and depression, and about 88% of the association between socio-economic status and multimorbidity.

CONCLUSIONS

Food insecurity is significantly associated with adverse physical and mental health outcomes. Interventions to improve food security, especially in low socio-economic populations, should be prioritised given their associations with multimorbidity, anxiety and depression. Potential intervention effects will require longitudinal or experimental evaluation.