Diabetic retinopathy gets a dedicated psychosocial measure in Iranian patients
Vision loss from diabetic retinopathy is not only a retinal problem. It also changes how patients work, move through daily routines, manage treatment costs, and relate to family and society. In that setting, a questionnaire that captures psychological adaptation is more than a research exercise; it can become a practical clinical screen for distress that would otherwise remain hidden behind visual acuity measurements and retinal photographs.
Researchers in northeastern Iran developed and validated the Diabetic Retinopathy Psychosocial Adjustment Questionnaire, or DRPAQ, to measure broader adjustment processes in people living with diabetic retinopathy. The instrument was built around Lazarus and Folkman’s transactional model of stress and coping, a framework that treats illness adjustment as an active interaction between a person’s appraisal of stress and the coping resources available to them. That design choice matters because visual impairment often destabilizes perceived control long before it produces complete dependence.
The final tool was reduced from an initial 65-item pool to 35 items and organized into six factors. Those factors aligned with the transactional model and explained 62.4% of the variance, suggesting that the instrument is not just internally consistent but conceptually coherent as well.
Item reduction produced a 35-question instrument with a six-factor structure
The study used a cross-sectional psychometric design in 2025 at a tertiary eye hospital in northeastern Iran. Item generation started with prior qualitative data, then moved through DeVellis’s eight-step approach, which is commonly used in scale development to move from a broad concept to a stable measurement tool. Face validity was examined in both qualitative and quantitative forms, content validity was assessed with 12 experts using CVR and CVI, and construct validity was tested with exploratory and confirmatory factor analysis in 364 patients.
A separate pilot group of 30 patients completed the test-retest portion, allowing investigators to assess stability over time. The resulting data supported a questionnaire that seems unusually robust for an early-stage psychosocial instrument in ophthalmology. Confirmatory factor analysis showed excellent fit indices, including χ²/df of 2.14, RMSEA of 0.056, CFI of 0.95, TLI of 0.94, NFI of 0.92, and SRMR of 0.045.
Those numbers are not ornamental. In psychometrics, they indicate that the observed item structure tracks closely with the proposed model rather than forcing an awkward fit onto the data. For a condition like diabetic retinopathy, where emotional strain can stem from fear of blindness, loss of independence, and treatment burden, a well-fitting instrument offers a structured way to identify what patients are experiencing before those concerns harden into disengagement from care.
Reliability was exceptionally high across the full validation sample
Internal consistency was strong to the point of being striking. Cronbach’s alpha ranged from 0.971 to 0.995 across subscales, with an overall alpha of 0.992 in the full validation sample of 364 patients. Test-retest stability in the 30-patient pilot subsample reached an intraclass correlation coefficient of 0.89.
The scale’s reliability profile suggests that the DRPAQ is capturing a tightly related set of psychosocial constructs rather than scattered noise. In clinical terms, that means it could be useful in a consultation room where time is limited and the goal is to detect whether a patient is coping, withdrawing, or becoming overwhelmed by the cumulative burden of eye disease and diabetes management.
A very high alpha can sometimes raise concern that questions overlap too closely, but in this context the result still supports internal coherence. Patients with diabetic retinopathy often face a cluster of linked experiences: declining function, heightened worry, altered social roles, and frustration with ongoing care. A scale that tracks those experiences in a structured way may help clinicians distinguish between routine adjustment and maladaptive stress responses that deserve intervention.
Why a culturally grounded questionnaire matters in eye care
The investigators specifically designed the DRPAQ for Iranian patients, and that local grounding is central to its value. Psychosocial adjustment is shaped by culture, family expectations, health beliefs, economic pressure, and the social meaning of vision loss. A tool that performs well in one setting but ignores those influences may miss the actual barriers patients face when trying to cope with chronic eye disease.
In diabetic retinopathy, adaptation is often as important as detection. Retinal treatment can slow vision loss, but it does not automatically restore confidence, independence, or social participation. A questionnaire like DRPAQ can help clinicians identify patients who appear medically stable yet remain psychologically vulnerable, especially when the burden of travel, treatment cost, and uncertainty about future sight weighs heavily on daily life.
The study also sits within a broader gap in ophthalmic care. Existing instruments measure vision-related quality of life, but those measures do not always capture the cognitive and emotional processes involved in adaptation. The DRPAQ was built to measure those processes directly, which gives it a different clinical role from generic quality-of-life scales.
A screening tool with research and bedside potential
The practical value of the DRPAQ lies in its ability to separate psychosocial adjustment from visual disability itself. A patient can have the same level of retinal disease as another patient and respond in a completely different way, depending on coping style, social support, and perceived control. A validated questionnaire gives clinicians and researchers a way to measure that difference instead of guessing at it.
Because the study was cross-sectional, it does not show whether the DRPAQ predicts later adherence, depression, retinal outcomes, or quality-of-life change. It also reflects one hospital-based population in northeastern Iran, so broader use will require testing in other settings and languages. Still, the psychometric profile is strong enough to justify further evaluation in longitudinal studies and routine clinical workflows.
The most immediate clinical implication is simple: diabetic retinopathy should not be treated as a purely retinal diagnosis. A patient’s ability to adapt may shape whether treatment plans are understood, accepted, and carried out. A tool with demonstrated validity and reliability gives eye teams a way to measure that burden rather than leaving it invisible.