Research

A large cohort study of newly diagnosed type 2 diabetes patients found that medication adherence was directly linked to long-term outcomes, tracking all-cause mortality and cardiovascular hospitalization over more than a decade of follow-up.¹ Separately, research on elderly patients with hypertension and diabetes found that stronger overall medication adherence was associated with both fewer hospitalizations and lower mortality rates²— and that this relationship held independent of a patient's underlying health status.

A review of randomized controlled trials in older adults found that structured adherence interventions led to significantly lower rates of emergency department visits and hospitalizations³ compared to standard care.

Beyond hard clinical outcomes, adherence is tied to how people actually feel day to day. Research on elderly patients found meaningful links between medication adherence and overall quality of life, alongside patient activation and confidence in managing their own health⁴.

The effect isn't limited to medication. In a randomized trial of 1,685 adults in a weight-loss program, how often someone kept a food record was itself a significant, independent predictor of results — each additional weekly record was tied to measurably more weight lost, in a dose-dependent relationship that held regardless of anything else going on in someone's program⁸. The act of recording something consistently appears to change the behavior being recorded, not just document it.

A meta-analysis spanning 138 studies and nearly 20,000 participants found that people who monitored their progress toward a goal — health, fitness, academic, or otherwise — were reliably more likely to attain it than people who didn't, across the entire body of experimental evidence⁹. The effect grew stronger the more frequently someone checked in, and stronger still when progress was recorded rather than just noticed — which is the whole premise of daily check-ins over an occasional mental note.

This is the part most relevant to why a tool like the Soluna Wellness App exists at all. A systematic review and meta-analysis of mobile health apps found that app-based interventions produced a statistically significant improvement in medication adherence⁵, with the effect size larger than that seen in traditional interventions like motivational interviewing or basic SMS reminders. A broader scoping review of mHealth tools reported that the large majority of studies found improved adherence associated with personalized reminders, real-time tracking, and AI-driven support⁶, alongside downstream improvements in measures like blood pressure and glucose control. In a smaller randomized trial of a medication adherence app among adults with chronic illness, 43% of app users showed a reliable improvement in adherence over the study period, compared to about 10% in the control group¹¹.

A cluster-randomized trial of more than 4,000 tuberculosis patients tested reminders and tracking against standard care directly: the share of patient-months with significantly missed doses was 29.9% under standard care, fell modestly to 27.3% with text-message reminders alone, and dropped to 13.9% when reminders were combined with adherence tracking¹⁰ — tracking, not just reminding, was what made the largest difference.

The scale of the underlying problem is significant: patients in developed nations adhere to only about half of medications prescribed for chronic conditions⁷. That gap — not a lack of available treatments, but a lack of consistency in following them — is precisely what daily tracking, reminders, and AI-assisted check-ins are designed to close.