Food Insecurity Trajectories and Health Service Utilization: Longitudinal Evidence and Population Impact Among Adults and Older Adults in Southern Brazil

In the landscape of public health, the connection between what people eat and how they access medical care is often viewed as a straightforward line: hunger leads to sickness, and sickness leads to doctors. Yet, the reality of this relationship is far more complex, shaped by the stability of a person's life over time rather than just a single moment of need. Food and nutrition insecurity describes a situation where a household does not have reliable access to enough safe and nutritious food to maintain a healthy life. This condition is not merely a lack of calories; it is a marker of deep social vulnerability that can trigger a cascade of health problems, from chronic diseases to mental health struggles. When researchers look at how this insecurity plays out, they are not just counting empty stomachs; they are tracing how economic hardship forces people into the healthcare system, often at the most expensive and crowded levels of care. Understanding these patterns is crucial for any society that aims to protect its most vulnerable citizens and keep its public health systems running smoothly.

A team of researchers in southern Brazil set out to map these patterns by following a specific group of people over several years. They focused on adults and older adults in the coastal city of Rio Grande, a place with significant income inequality, who had all been confirmed to have had the virus that causes COVID-19. The study began during the height of the pandemic in 2021 and continued with a follow-up visit between late 2022 and early 2023. The goal was to see how the experience of food insecurity changed for these individuals over time and whether those changes influenced how often they needed to visit hospitals, emergency rooms, or local health clinics. The researchers tracked whether participants remained food secure, recovered from food insecurity, fell into it for the first time, or remained stuck in a state of insecurity throughout the entire period.

The results revealed a clear and troubling trend. About one in five participants, or 20.9 percent, reported that they faced food insecurity at both the beginning and the end of the study. This group, which remained in a state of persistent insecurity, was significantly more likely to seek medical help than those who were able to secure their food supply. When the researchers looked at the data, they found that people with persistent food insecurity were nearly twice as likely to visit a public emergency department compared to those who were food secure. They were also 40 percent more likely to use emergency care units and 19 percent more likely to visit primary health care clinics. The pattern held true even when the researchers accounted for other factors like age, gender, education, and employment status.

The study also highlighted a stark difference in how people accessed care based on their economic resources. While those struggling with food insecurity relied heavily on the public health system, those who recovered from food insecurity or remained secure were less likely to use private emergency departments. This suggests that when people lack the financial means to buy food, they also lack the resources to bypass the public system, which often involves longer wait times and higher patient volumes. The data showed that the public emergency departments, in particular, bore a heavy burden from this group. The researchers calculated that if food insecurity could be completely eliminated from this population, visits to public emergency departments could drop by roughly 21 percent. Similarly, visits to emergency care units could fall by 10 percent, and visits to primary health care clinics by 7 percent.

These findings suggest that food insecurity acts as a powerful driver of demand for public health services, pushing people toward higher levels of care that are more costly and complex. The study indicates that this is not just a temporary reaction to a crisis but a persistent issue that accumulates over time. Those who remained food insecure throughout the pandemic and its aftermath were the ones most likely to end up in emergency rooms, likely because their health conditions worsened without the stability needed for preventive care. The researchers emphasize that this is not merely a health issue but a social one, where the inability to access food is inextricably linked to the inability to access timely and effective medical treatment.

The implications of these results point toward a need for a more integrated approach to public policy. The authors argue that health clinics should routinely screen for food insecurity, treating it as a vital sign just like blood pressure or heart rate. By identifying families who are struggling to put food on the table, health workers could connect them with social support programs before their health deteriorates to the point of requiring emergency intervention. The study concludes that investing in food and nutrition security is not just about feeding people; it is a practical strategy to reduce the strain on the public health system and improve the overall well-being of the population. In a world where resources are finite, ensuring that people have regular access to adequate food emerges as a fundamental step toward a healthier and more sustainable society.