A medical study investigated the long-term impact of glycaemic control on renal function in patients with Type 1 diabetes. The investigators measured the concentration of glycated haemoglobin (HbA1c) in blood and the rate of albumin excretion in urine. The results are illustrated in Figure 1.
Describe the trend shown in Figure 1.
Use data from Figure 1 in your answer.
| Mean HbA1c (%) | Albumin Excretion Rate (μg min−1\mu\text{g min}^{-1}μg min−1) |
|---|---|
| 6.0 | 10 |
| 7.0 | 22 |
| 8.0 | 48 |
| 9.0 | 92 |
| 10.0 | 158 |
| 11.0 | 250 |