A 58-year-old woman from urban Delhi attends a diabetes screening camp. She is a homemaker with a BMI of 31.2 kg/m². She has been sedentary for the past 10 years due to knee arthritis. Fasting blood glucose is 118 mg/dL, and 2-hour post-glucose load value is 165 mg/dL. She denies family history of diabetes. What is her current glycemic status, and which epidemiological intervention would be most cost-effective for her?

Explanation

## Glycemic Status Classification and Epidemiological Intervention ### Diagnostic Criteria for Glucose Metabolism Disorders | Category | Fasting Glucose (mg/dL) | 2-Hour OGTT (mg/dL) | HbA1c (%) | | --- | --- | --- | --- | | **Normal** | < 100 | < 140 | < 5.7 | | **Impaired Fasting Glucose (IFG)** | 100–125 | < 140 | 5.7–6.4 | | **Impaired Glucose Tolerance (IGT)** | < 126 | 140–199 | 5.7–6.4 | | **Type 2 Diabetes** | ≥ 126 | ≥ 200 | ≥ 6.5 | **Key Point:** This patient has **Impaired Fasting Glucose (IFG)** — fasting glucose 118 mg/dL (100–125 range) with 2-hour post-load 165 mg/dL (< 200, so not IGT or diabetes). ### Epidemiological Rationale for Lifestyle Intervention **High-Yield:** IFG and IGT are **prediabetic states** with annual progression to type 2 diabetes of 5–10%. However, lifestyle modification (weight loss 5–10%, 150 min/week moderate activity) reduces progression by **58% in non-obese and 71% in obese populations** [cite:Diabetes Prevention Program]. **Clinical Pearl:** This patient has modifiable risk factors: - Obesity (BMI 31.2 kg/m²) — **modifiable** - Sedentary lifestyle — **modifiable** - No family history — **non-modifiable but absent** Intensive lifestyle modification is **cost-effective, evidence-based, and prevents or delays diabetes onset** in prediabetic populations. ### Why Metformin Is NOT First-Line Here Metformin is indicated for **IGT or IFG with additional risk factors** (family history, obesity, age > 60) in some guidelines, but **lifestyle modification is the gold standard first-line intervention** for prediabetes in epidemiological practice and is more cost-effective in resource-limited settings. **Mnemonic:** **STOP DM** — **S**creening, **T**reatment (lifestyle), **O**besity reduction, **P**revention; **D**iagnosis confirmation, **M**anagement escalation (only if lifestyle fails). [cite:Park 26e Ch 5; ADA Standards of Care 2023]