Table 2:
Outcomes of Interventions
| Study author, year | Mean baseline A1C, % | Intervention mean change in A1C, % | Control mean change in A1C, % | Statistical significance |
|---|---|---|---|---|
| Anderson, 2005 | 8.6 | 8.74 baseline; 8.34 post intervention |
8.41 baseline; 8.13 post intervention |
No sign difference; sign pre/post decrease in HbA1c (p<0.001) |
| Anderson-Loftin, 2002 | 50% elevated levels | Decreased 1.18 | No control | P=0.0106 |
| Carter, 2011 | 8.9 | 9.0 baseline; 6.82 post intervention |
8.8 baseline; 7.9 post intervention |
P<0.05 OR=4.58 to reach A1c<7 if in intervention |
| Davis, 2010 | 9.3 (intervention); 8.9 (control) |
9.4 baseline; 8.3 6-mo post; 8.2 12-mo post |
8.8 baseline; 8.6 6-mo post intervention; 8.6 12-mo post |
P=0.003 6-mo P=0.004 12-mo |
| Hawkins, 2010 | 8.95 | Decreased 1.7 | Decreased 0.6 | P=0.015 |
| Mayer-Davis, 2004 | 9.6 (usual care); 9.7 (reimbursable care); 10.2 (intensive care) |
Decreased 0.8 reimbursable; Decreased 1.6 intensive | Decreased 1.1 | Not significant |
| Rimmer, 2002 | 10.8 | 10.8 baseline; 10.3 post intervention |
No control | No significant difference |
| Tang, 2010 | 8.2 (intervention); 7.9 (control) |
Decreased 0.68 | Increased 0.32 | P=0.008 |
| Walker, 2010 | 41% elevated levels | 39% elevated levels | Not reported | Not significant |
| Weinstock, 2011 | 7.02 (White); 7.58 (Black); 7.79 (Hispanic) |
7.10 baseline, 6.87 5-yr post (White); 7.61 baseline, 6.95 5-yr post (Black); 7.69 baseline, 7.32 5-yr post (Hispanic) |
6.97 baseline; 6.93 5-yr post (White); 7.56 baseline, 7.20 5-yr post (Black); 7.94 baseline, 7.82 5-yr post (Hispanic) |
Treatment effect not significant (Black, White) Treatment effect 0.50 (95%CI 0.22–0.78) (Hispanic) |