Adult disability and mental/psychological illness in Somaliland socioeconomic inequalities and co-occurrence in the 2020 Somaliland Health and Demographic Survey

Understanding the health of a population requires looking beyond the absence of disease to the presence of limitations that shape daily life. In the field of public health, disability is recognized not merely as a medical condition but as a complex interaction between an individual's physical or mental state and the world they live in. Researchers often examine how these limitations are distributed across different groups, asking whether they cluster among the poor or the wealthy, or if they appear equally across society. This line of inquiry is crucial because it reveals whether a society is failing its most vulnerable members or if resources are reaching those who need them most. When mental health struggles are added to this picture, the question becomes even more intricate: do physical limitations and psychological distress travel together, and does the weight of poverty make this journey harder? Answering these questions in places where data is scarce is essential for building fair and effective support systems.

In Somaliland, a self-declared state in the Horn of Africa, such evidence has been thin until recently. A team of researchers turned to the 2020 Somaliland Health and Demographic Survey to fill this gap, analyzing the lives of nearly fourteen thousand adults. They sought to map the landscape of disability, looking specifically at how often it appeared, who it affected most, and how it related to a person's financial standing and mental well-being. The study defined disability broadly, counting anyone who reported difficulty in at least one of seven areas: seeing, hearing, speaking, learning, moving around, taking care of themselves, or managing their mental health. By treating these seven areas as a single measure of reported disability, the researchers could see the full picture of how many adults were living with some form of limitation.

The results revealed that disability is a significant part of the adult experience in Somaliland, affecting roughly one in every fourteen people. However, this burden is not shared equally across the lifespan. The likelihood of reporting a disability rises sharply with age. Among adults between the ages of eighteen and twenty-nine, the rate was just over four percent. By the time people reached sixty or older, that figure climbed to nearly twenty-four percent. The most common difficulty reported was trouble with sight, followed by challenges with hearing and moving around. These numbers provide a clear baseline, showing that while disability is not the norm for the entire population, it is a frequent reality for the older generation.

When the researchers looked at whether money influenced these rates, the story became more complicated. At first glance, the data did not show a simple, straight-line pattern where the poorest people had the most disabilities and the richest had the least. Instead, the relationship was uneven. Once the researchers accounted for where people lived—distinguishing between different regions and whether they lived in cities or rural areas—the direct link between household wealth and disability faded away. This suggests that geography and local conditions might play a larger role in who experiences disability than income alone does. However, a statistical measure of inequality did show a modest tendency for disability to be slightly more concentrated among those with higher wealth, a finding that runs counter to the usual assumption that poverty is the primary driver of disability in low-resource settings.

The study also explored the connection between physical or functional limitations and mental or psychological illness. Reported mental illness was rare on its own, affecting less than one percent of the adult population. Yet, when the researchers looked at how often mental illness appeared alongside other disabilities, they found a striking pattern. The two conditions occurred together far more often than chance would predict. In fact, adults with a reported disability were nearly forty-three times more likely to also report a mental or psychological illness than those without a disability. This strong association held true even after adjusting for age and sex, indicating that the experience of living with a limitation is deeply intertwined with psychological distress.

These findings offer a new, detailed view of adult health in Somaliland, moving beyond simple counts to show how age, place, and mental health shape the experience of disability. The data confirms that disability is a major concern, particularly for older adults, and highlights a powerful link between functional limitations and mental well-being. While the study could not prove cause and effect due to its design, it establishes a critical foundation for understanding who is affected and how these challenges overlap. It underscores the need for health systems to recognize that physical limitations and mental health struggles often occur together, and that addressing one without the other may leave a significant portion of the population's needs unmet.