Which of the following is NOT a feature of type 2 diabetes mellitus?

DSSSB 14 August 2024

Medical & Surgical Nursing

Medium

Appeared in: DSSSB 14 August 2024

Explanation

The term 'Insulin-dependent diabetes mellitus' (IDDM) is the former classification for Type 1 Diabetes Mellitus.
Type 1 DM is an autoimmune condition where the body destroys its own insulin-producing beta cells, leading to an absolute deficiency of insulin.
Patients with Type 1 DM are dependent on external (exogenous) insulin for survival.
In contrast, Type 2 DM is primarily a condition of insulin resistance, not absolute insulin deficiency, and was formerly known as Non-Insulin-Dependent Diabetes Mellitus (NIDDM).

Option A: This statement is a correct feature of Type 2 DM. It is by far the most prevalent form, accounting for approximately 90-95% of all diagnosed cases of diabetes.
Option C: This is a historical name for Type 2 DM. While the onset is now occurring in younger populations, it traditionally develops in adults, so this term is strongly associated with Type 2 DM.
Option D: This is a defining characteristic of Type 2 DM. The pancreas still produces insulin, but the body's cells are resistant to its effects. This contrasts with Type 1 DM, where endogenous insulin production is absent or minimal.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Differentiating features of Type 1 and Type 2 Diabetes Mellitus as background academic context rather than a clinical decision trigger.
Correctly identifying the type of diabetes is critical for initiating the appropriate management plan. Misclassifying a patient with Type 1 DM as Type 2 and delaying insulin therapy can lead to diabetic ketoacidosis (DKA), a life-threatening emergency.
Patient education differs significantly. Type 1 DM education focuses on insulin administration, carbohydrate counting, and hypoglycemia management. Type 2 DM education initially emphasizes lifestyle modification, diet, exercise, and oral medication adherence.
What if? If a patient diagnosed with Type 2 DM in their 40s is lean, has a rapid decline in blood sugar control despite oral medications, and tests positive for GAD antibodies, the diagnosis would likely change to Latent Autoimmune Diabetes in Adults (LADA or Type 1.5). This patient would require insulin therapy much sooner than a typical Type 2 patient.

How to Approach the Question

First, identify the negative framing of the question by spotting the word 'NOT'. This means you are looking for the one option that is false in the context of Type 2 DM.
Recall the fundamental definition of Type 2 Diabetes Mellitus: it is a condition of insulin resistance and relative insulin deficiency.
Evaluate each option against this core definition.
Option A: Is Type 2 the most common? Yes, it's 90-95% of cases. This is a true feature.
Option B: Is Type 2 called 'insulin-dependent'? No, that's Type 1. Type 2 was called 'non-insulin-dependent'. This is a false statement about Type 2.
Option C: Is it called 'adult-onset'? Yes, that's a historical name. This is a true feature.

Concept Tested & Keywords

Concept Tested: Differentiating features of Type 1 and Type 2 Diabetes Mellitus.
Stem keywords: type 2 diabetes mellitus, feature
Lead-in keywords: NOT
Negative lead-in flag: The question asks for the feature that is NOT present in Type 2 Diabetes Mellitus.

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