Clarke grid analysis is used to compare the glucose measurement obtained from POC and CGM. A table is also provided with percentage of values of CGM that occur within different zones. Zone A: no effect on clinical action (CGM within 20% of POC). Zone B: altered clinical action with little to no effect on clinical outcome (>20% difference, no incorrect treatment). Zone C: altered clinical action, likely to affect clinical outcome (hyperglycemia or hypoglycemia leading to inappropriate treatment). Zone D: altered clinical action, could have significant medical risk (undetected hypoglycemia or hyperglycemia needing treatment). Zone E: altered clinical action, could have dangerous consequences (hypoglycemia mistaken for hyperglycemia, and vice versa).
CGM = continuous glucose monitoring;
POC = point-of-care.
N |
A (%) |
B (%) |
D (%) |
137 |
76.6 |
21.2 |
2.2 |