Outcome Is HbA1c Over Time | Intent to Treat, N = 1022 | Connection to Health Per Protocol, N = 458 | ||
---|---|---|---|---|
Variable | Adjusted Models, Coef (SE) | P-Value | Adjusted Models, Coef (SE) | P-Value |
Intercept | 7.5385 (0.1941) | <.0001 | 6.6848 (0.2368) | <.0001 |
Age group (years) | ||||
17 to 49 | Ref | — | Ref | — |
50 to 64 | 0.8017 (0.1368) | <.0001 | 0.8571 (0.1956) | <.0001 |
65 or greater | −1.2746 (0.1449) | <.0001 | −1.057 (0.2199) | <.0001 |
Female gender | 0.0881 (0.1034) | .3942 | 0.2259 (0.1572) | .1509 |
BMI (at baseline, centered) | −0.0232 (0.0070) | .0010 | −0.0436 (0.0105) | <.0001 |
Pulmonary | −0.4775 (0.2289) | .0371 | ||
Diabetic retinopathy | 0.3368 (0.1595) | .0348 | ||
Renal | 0.4531 (0.2587) | .0801 | ||
Oral diabetic medications | 0.7150 (0.1287) | <.0001 | 0.6452 (0.1817) | .0004 |
Insulin | 1.7418 (0.1117) | <.0001 | 1.7147 (0.1663) | <.0001 |
Intervention vs SMS-ED (at baseline) | ||||
CTH vs SMS-ED | −0.0987 (0.1551) | .5245 | −0.049 (0.3530) | .8891 |
CTH + PF vs SMS-ED | 0.0160 (0.1524) | .9164 | 0.6519 (0.2300) | .0047 |
HbA1c change per 12 months (slope) | Compared to SMS−ED | Compared to SMS−ED | ||
SMS-ED | 0.1638 (0.0853) | — | 0.1546 (0.0920) | — |
CTH | 0.3022 (0.0756) | .2243 | 0.0671 (0.2255) | .7193 |
CTH + PF | 0.1441 (0.0721) | .8601 | −0.1640 (0.1269) | .0422 |
BMI, body mass index; CTH, Connection to Health; CTH + PF, Connection to Health with practice facilitation; HbA1c, hemoglobin A1c; SMS-ED, self-management support education; SE, standard error.
Overall P-value for group x time: 0.2724. The overall group x time effect is used to determine whether there are differences in slopes between the three study arms. The coefficients in the table show the actual slopes (SE) for each study arm, along with the p-value for the differences for CTH vs SMS-ED, and CTH + PF vs SMS-ED.