Continuous glucose monitor readings, shown as a per cent of total readings before (pre-trek, 3908 readings), during (trek, 4976 readings) and after (post-trek, 3866 readings) a trek to Everest Base Camp by a 42-year-old man with type 1 diabetes. Pre-trek and post-trek altitudes are at sea level
| CGM glucose (mmol/L) | CGM readings (%) | ||
| Pre-trek (14 days) | Trek (18 days) | Post-trek (14 days) | |
| <2.8 | 1.1 | 0.4 | 0 |
| <3.3 | 2.0 | 0.8 | 0.2 |
| <3.9 | 3.9 | 1.3 | 1.1 |
| 3.9–7.8 | 35.3 | 20.0 | 22.6 |
| 3.9–10 | 66.4 | 40.6 | 49.3 |
| >7.8 | 60.8 | 78.7 | 76.3 |
| >10 | 29.8 | 58.1 | 49.6 |
| >15 | 1.6 | 11.3 | 6.3 |
CGM, continuous glucose monitoring.