| Errors identified by type of diabetes and treatment | T1D (n = 82) | T2D on insulin and biguanides (n = 14) | T2D on hypoglycemic sulfonamides and biguanides (n = 10) |
| No hand washing | 46 | 3 | 06 |
| Use of a disinfectant | 19 | 3 | 05 |
| Reusing the lancet after use | 59 | 6 | 04 |
| Failure to check strip expiration date | 57 | 4 | 03 |
| Failure to close the box of blood glucose test strips | 10 | 00 | 09 |
| Use of a can opened more than 3 months ago | 08 | 08 | 02 |
| Failure to use a needle container | 27 | 02 | 00 |