Psychometric Properties of the Persian Version of the Social Determinants of Health Questionnaire in Patients Undergoing Hemodialysis

Imagine health not just as a medical chart, but as a house. You can have the strongest foundation and the sturdiest roof (your genes and your doctor), but if the neighborhood is crumbling, the roads are blocked, or you can't afford to buy groceries, the house still won't be safe. In the world of science, these outside factors—where you live, how much money you make, your education, and who supports you—are called "Social Determinants of Health." They are the invisible weather patterns that decide whether your health house stays warm or gets flooded. For people with serious, long-term illnesses like kidney failure, who need a machine to filter their blood several times a week, these outside factors become even more critical. If they can't get to the clinic, can't afford the food they need, or feel unsafe at home, their treatment can fail. But to fix these problems, doctors first need a good map. They need a tool that can accurately measure these invisible pressures.

This is exactly what the researchers in this study set out to do. They took a map called the "Steps to Better Health Questionnaire" (STBH-Q), which was originally drawn up in Australia, and tried to redraw it for the specific landscape of Iran. The original map had 16 questions designed to check five different "neighborhoods" of a patient's life: Access to things like food and transport; Money and Jobs; Safety; Physical and Mental Health; and Family history. The team wanted to know: If we translate this map into Persian and use it on kidney dialysis patients in Iran, will it still work? Will it point out the real problems, or will it just be a confusing piece of paper?

To find out, the researchers gathered a massive group of 435 patients from nine different dialysis centers in Qazvin Province. They didn't just guess; they put the new Persian version of the questionnaire through a rigorous "stress test." First, they checked Validity, which is like asking, "Does this tool actually measure what it says it measures?" They asked experts and patients if the questions made sense (Face Validity) and if they covered all the important topics (Content Validity). The results were glowing: the experts gave the tool a thumbs-up, with scores showing the questions were highly relevant and clear. They also checked if the tool could tell the difference between people with different life situations. For instance, they found that single patients and those who were employed scored differently than widowed or unemployed patients, proving the tool could spot real differences in people's lives.

Next, they tested Reliability, which is like asking, "If we use this map twice, will it show the same terrain?" They asked 25 patients to take the test, wait two weeks, and take it again. The scores matched up almost perfectly, with a statistical score (called ICC) of 0.94 for the whole questionnaire. In the world of measurements, that's a very high number, meaning the tool is stable and trustworthy.

However, the paper does point out a few bumps in the road. One question about "harmful habits" (like addiction) didn't correlate as strongly with the other questions as the researchers hoped. The authors suggest this might be because people in Iran are hesitant to admit to these issues due to social stigma, rather than the question being "wrong." Also, two sections of the map—"Safety" and "Family and Childhood"—only had two questions each, which made them a bit less reliable than the sections with more questions. The researchers suggest that future versions might need to add more questions to these specific areas to make them stronger.

In the end, the study concludes that the Persian version of the STBH-Q is a valid and reliable tool. It's a working map that Iranian doctors and social workers can now use to spot the hidden struggles of dialysis patients. By using this tool, they can better understand who needs help with transportation, who needs financial support, and who needs counseling, allowing them to build better bridges between patients and the care they need. While the study was limited to one province and suggests that more testing in other regions would be helpful, it successfully proves that this specific questionnaire can be adapted to help Iranian patients navigate their health journey.