Table 2.
Gain score comparison.
| Baseline mean A1c (SD) |
Posttreatment mean A1c (SD) |
A1c t-value (within subjects) |
Gain score | Est. % below A1c 6.4 at baseline | Est. % below A1c 6.4 posttreatment | % t-value (within subjects) |
Impact Score | |
|---|---|---|---|---|---|---|---|---|
| Control | 8.70 (1.48) | 8.18 (1.43) | −3.66** | −0.52 | 11.65% | 14.53% | 3.15** | 2.88 |
| Intervention | 8.70 (1.47) | 7.61 (1.34) | −8.29** | −1.09 | 12.73% | 22.84% | 6.96** | 10.11 |
| Significance (between subjects) |
t(146) = 3.51, P < 0.01. |
F(1, 146) = 7.25, P < 0.01 |
t(146) = −4.20, P < 0.01. |
Note. **P < 0.01. % below A1c 6.4 is an estimate of the percentage of participants in each group who achieved an A1c level below 6.4. Gain Score is A1c change from baseline to posttreatment. Impact Score is the change in estimated percent below A1c 6.4 from baseline to post-intervention.