Stress and Health-Related Quality of Life in Adults With Type 1 Diabetes: The Mediating Role of Perceived Support and Treatment Adherence.

The study is cross-sectional, so it cannot show that distress causes lower support, lower adherence or poorer quality of life. Participants were volunteers recruited through patient associations and online, not from clinical settings, so they may be more engaged and better controlled than many adults with type 1 diabetes. The sample was 81.3% women and Spanish-speaking, so results may not apply to men, other languages or clinical populations. All measures were self-report, so social desirability and recall could affect distress, support, adherence and quality of life. The Self-Care Inventory-Revised had low internal consistency (Cronbach's alpha 0.691 overall, 0.676 general and 0.638 regularity), so adherence findings are less reliable. The paper reports 864 participants as the final sample, then 772 after exclusions and 762 analysed in mediation, and also says all participants maintained glycaemic control within recommended ranges while reporting 58.4% with excellent metabolic control, so the sample and control status are unclear.

The authors declared no conflicts of interest.

Do not conclude that reducing distress or increasing support will improve quality of life. This was a cross-sectional online survey of volunteers, so it cannot establish cause and effect. The adherence measure also had low internal consistency, so its links are less secure.