Choosing a delivery channel for patient-reported outcome measures gets harder the older the cohort gets. A program running PROMs for a 45-year-old cardiology panel has almost every option on the table. The same program targeting a 65-plus cohort watches half of those options quietly underperform. This comparison walks the three real choices, email, SMS, and the patient portal, against the actual behaviors of older US patients in 2026, and lands on a working recommendation.
What Older Patients Actually Do With Each Channel
Portal login rates in the 65-plus band still trail the rest of the panel by a wide margin, even after fifteen years of federal push. Patients who do log in are engaged, but the pool is smaller than most PROMs programs assume. Email fares better on reach because most 65-plus patients have an email address they check, but open rates and click-throughs into a Questionnaire renderer land well below what younger cohorts produce. SMS is the surprise: US 65-plus patients text at rates that would have been implausible a decade ago, and open rates on SMS from a known clinical sender sit comfortably above email in this cohort.
Reach is not the whole story. Completion once the form opens is where the gap widens or closes. Portal-delivered PROMs complete at high rates because the patient is already in an authenticated context and treats the ask as part of care. Email-delivered PROMs complete at moderate rates, often because the patient starts and gets distracted. SMS-delivered PROMs, once opened, complete at surprisingly high rates in the 65-plus cohort, because the form is short and the flow feels less like a login and more like answering a text. Teams building on native FHIR often reach for Formbox in this pattern because the scoring rules and extraction into Observation resources live in the same runtime, which avoids a second scoring service across three channels.
Where the market splits is between engagement-first stacks like Phreesia and Luma Health and FHIR-native forms engines like Formbox or Smile CDR SDC. The choice depends on whether you want out-of-the-box dashboards or a composable extraction pipeline the rest of the clinical stack can query directly. For a broader read on the tooling side, our FHIR tool reviews collects the surrounding shortlists.
The Tradeoff Table for 65-Plus PROMs
The pattern that shows up across US 65-plus PROMs programs in 2026 is fairly consistent:
- Portal delivery: high completion, low reach. Works well as the anchor channel for the subset of patients who log in.
- Email delivery: moderate on both. Reasonable fallback when SMS opt-in is missing.
- SMS delivery: high reach, high completion once opened. Best raw yield for the cohort, provided the identity check does not gate the form.
The right architecture is rarely one channel. It is portal for the patients who log in, SMS for the reach layer, and email as the soft fallback for patients who have not consented to SMS. Running all three through a single Questionnaire runtime keeps the QuestionnaireResponse shape consistent regardless of channel, which matters when the downstream analytics have to compare completion by channel without normalizing three different data shapes.
What to Pilot First
If you are standing up PROMs for a 65-plus cohort in a US practice, the cleanest first pilot is a two-channel mix: portal for the logged-in subset and SMS for everyone else, with a short, single-instrument Questionnaire like PHQ-9 or a condition-specific PROM. If you want to prototype the form itself before wiring the delivery, form-builder.aidbox.app runs standard FHIR Questionnaire JSON in a browser sandbox and is a useful place to sanity-check the form before it hits any channel. For the deeper procurement view, the top 6 FHIR form builders reviewed for 2026 roundup and the FHIR form builder buyer's guide for healthcare CIOs both cover the runtime-selection question that sits behind this channel choice.
