Efficacy of Osteoporosis Prevention Smartphone App.

The sample was mostly White, college-educated women with moderately high socioeconomic status, and it was recruited through volunteers, so it may not represent women with lower education, different racial backgrounds, or less interest in technology. Women were excluded if they had osteoporosis, bone medications, chronic illness, pregnancy, recent cancer, high calcium intake, or vigorous exercise, so the result does not apply to those groups. Word-of-mouth recruitment may have spread study content across groups, blurring the difference between the tailored app, standard education, and wait list. All groups received EMA prompts, and participants described them as motivating, so the assessment messages may have acted as an intervention. The app did not record activities done outside the app, such as walking with a friend or attending a Zumba class, so total behavior change was not fully captured. Participants changed the recommendations and did not always follow the prescribed amounts or frequency, so it is unclear how much of the intervention was actually delivered as intended. Bone outcomes were measured only at baseline and 12 months, and the authors said longer follow-up might be needed to detect differences.

The authors reported no conflicts of interest. The publication types list NIH extramural research support.

Do not conclude the app prevents osteoporosis or improves bone density. The primary BMD and TBS outcomes showed no significant differences between groups, and the authors said the app should not yet be moved into clinical practice.