82 lines
6 KiB
Markdown
82 lines
6 KiB
Markdown
---
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type: source
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title: "Medically Tailored Meals Pilot RCT: Null HbA1c Result Despite Intensive Intervention (Maryland 2024)"
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author: "Journal of General Internal Medicine (multiple authors)"
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url: https://link.springer.com/article/10.1007/s11606-024-09248-x
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date: 2024-12-01
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domain: health
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secondary_domains: []
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format: journal-article
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status: null-result
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priority: high
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tags: [medically-tailored-meals, mtm, rct, hba1c, null-result, diabetes, food-as-medicine, pilot-trial]
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processed_by: vida
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processed_date: 2026-03-18
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extraction_model: "anthropic/claude-sonnet-4.5"
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extraction_notes: "LLM returned 1 claims, 1 rejected by validator"
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---
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## Content
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Pilot randomized trial of medically tailored meals for low-income adults with type 2 diabetes, published in Journal of General Internal Medicine (2024).
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**Study design:**
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- 74 adults enrolled, 77% completing data collection
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- Demographics: mean age 48 years, 40% male, 77% Black, mean HbA1c 10.3% (severely uncontrolled)
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- Intervention: home delivery of 12 medically tailored, frozen meals + a fresh produce bag weekly for 3 months, PLUS individual calls with a registered dietitian monthly for 6 months
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- Control: usual care
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- Primary outcome: HbA1c at 6 months
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- Funding: Robert Wood Johnson Foundation
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**Results:**
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- Treatment group HbA1c change: -0.7%
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- Control group HbA1c change: -0.6%
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- Between-group difference: NOT statistically significant
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- NOTE: Control group reported more favorable changes in diabetes medications (suggesting control group had more active medication management)
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**Why both groups improved:**
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- The 6-month period coincided with study enrollment and regular contact with research staff — the study itself may have been therapeutic for both groups (Hawthorne effect)
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- Both groups received more attention and healthcare engagement than usual
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- The control group's medication adjustments may explain why their HbA1c improved similarly without the food intervention
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**Context:**
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- This is a PILOT study (underpowered by design for definitive conclusions)
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- Baseline HbA1c 10.3% means regression-to-mean is likely for any intervention
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- The study provides justification for a larger powered RCT
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## Agent Notes
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**Why this matters:** This is the most clinically intensive food-as-medicine intervention tested in a controlled design: pre-prepared medically tailored meals PLUS dietitian counseling PLUS produce delivery. If anything works, this should. The null result is not a verdict — it's a pilot — but it complicates the "better interventions fix the problem" hypothesis. Even the most intensive MTM model tested in a controlled setting doesn't reliably improve glycemic control in a 6-month window.
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**What surprised me:** The control group showing comparable HbA1c improvement (and MORE medication optimization) suggests that study participation itself — not food delivery — may be driving both groups' improvement. This is the Hawthorne effect at work: any intensive contact program improves outcomes, regardless of the specific content. This is the same issue that plagues behavioral interventions generally.
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**What I expected but didn't find:** A positive HbA1c result for the MTM group. I expected that if you deliver pre-prepared meals directly to people's homes (eliminating the food preparation barrier), you'd finally see glycemic improvement. The null result suggests the barrier isn't meal preparation — it may be something else (motivation, medication adherence, social context, stress).
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**KB connections:**
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- This is the most important new piece of evidence in Session 2
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- Directly extends the JAMA Doyle RCT null result to a different, more intensive intervention type
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- Challenges the "intervention intensity rescues FIM" hypothesis
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- The medication comparison finding (control group more medication-optimized) suggests an important confounder: medical management may be more impactful than food delivery for glycemic control
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**Extraction hints:**
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- Extractable claim: "Medically tailored meals PLUS dietitian counseling produced null HbA1c improvement in a pilot RCT (Maryland 2024), with the control group showing comparable glycemic improvement through enhanced medication management — suggesting medical management may be more glycemically impactful than food delivery alone"
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- The Hawthorne effect observation is important: study participation improves outcomes regardless of intervention; comparing to true usual care (no study contact) would likely show a benefit
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- Flag the pilot nature: underpowered, not definitive, but directionally important
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**Context:** Robert Wood Johnson Foundation-funded. Published in JGIM (General Internal Medicine), not a food/nutrition journal — reflects the clinical medicine community's engagement with the FIM evidence question. The demographics (77% Black, high-poverty, mean HbA1c 10.3%) are the target population for whom food-as-medicine is most often advocated. If it doesn't work here, the hypothesis has a problem.
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## Curator Notes
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PRIMARY CONNECTION: Food-as-medicine clinical evidence — the most intensive intervention type (MTM + dietitian) also shows null HbA1c result
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WHY ARCHIVED: Critical new evidence that the simulation-vs-RCT gap persists even for the "best" FIM intervention — changes the confidence level for food-as-medicine clinical outcome claims
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EXTRACTION HINT: Pair with the JAMA Doyle RCT null result. Two controlled trials, two intervention types (food pharmacy vs. MTM), same null HbA1c finding. This is a pattern, not a single study artifact.
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## Key Facts
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- Maryland pilot RCT enrolled 74 adults with type 2 diabetes, 77% completed data collection
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- Study demographics: mean age 48 years, 40% male, 77% Black, mean baseline HbA1c 10.3%
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- Intervention: 12 medically tailored frozen meals + fresh produce bag weekly for 3 months, plus monthly dietitian calls for 6 months
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- Treatment group HbA1c change: -0.7%, Control group: -0.6% (not statistically significant)
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- Control group reported more favorable diabetes medication changes than treatment group
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- Study funded by Robert Wood Johnson Foundation
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- Published in Journal of General Internal Medicine 2024
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