| Self-monitor (n = 67) | Routine care (n = 88) | p Value | |
| Median % time outside critical control range | 0.45 (0.0 to 1.8) | 2.04 (0.68 to 4.34) | 0.008 |
| % of tests below critical limit | 3.4 | 9.0 | <0.0001 |
| % of tests within critical limits | 93.3 | 88.8 | |
| % of tests above critical limit | 3.3 | 2.2 |