**Question:** Diabetes control is best monitored by

A. Blood glucose monitoring
B. Body mass index (BMI)
C. HbA1c
D. Microalbuminuria

**Core Concept:** In diabetes management, various parameters are used to assess the disease control and overall health status. These include blood glucose monitoring, BMI, HbA1c, and microalbuminuria.

**Why the Correct Answer is Right:**

C. HbA1c (Glycated haemoglobin) is the most appropriate parameter for monitoring diabetes control. HbA1c is a test that measures the average blood glucose level over the past 2-3 months. It provides a snapshot of long-term glucose control, which is crucial for diabetes management as it helps to identify patients with poor glycaemic control, impending hyperglycaemia or hypoglycaemia, and the effectiveness of treatment regimens.

**Why Each Wrong Option is Incorrect:**

1. Blood glucose monitoring (A) is essential for acute glycaemic control and adjusting insulin or oral hypoglycaemic medications, but it does not reflect long-term glycaemic control. HbA1c is more reliable for this purpose.
2. Body mass index (BMI) (B) is a measure of body fat and is used to identify overweight or obesity, but it is not specific to diabetes and does not evaluate glycaemic control.
3. Microalbuminuria (D) is a marker of kidney damage and cardiovascular risk in diabetes but does not directly reflect blood glucose control. HbA1c provides a more comprehensive assessment of diabetes management.

**Clinical Pearl:** A comprehensive assessment of diabetes control involves regular monitoring of HbA1c, blood glucose, BMI, and microalbuminuria. HbA1c is crucial for long-term glycaemic control evaluation, while blood glucose and microalbuminuria are essential for overall diabetes management. Maintaining an optimal BMI is vital for preventing obesity-related complications and improving cardiovascular health in diabetic patients.