Table 2.
Effect of Birmingham Own Health® Intervention on HbA1c values among people with diabetes
| Intervention | Control | Multivariate linear regression coefficients (95%CI) |
|
|---|---|---|---|
| N | 296 | 3454 | |
| Mean age (years) (SD) | 61.6 (13.1) | 63.5 (11.6) | -0.007 (-0.01, -0.004) |
| Males (n (%)) | 155 (52.4%) | 1828 (52.9%) | -0.03 (-0.10, 0.04) |
| Smoking status | |||
| Never smoker | 118 (39.9) | 1403 (40.6%) | 1.0 |
| Ex-smoker | 88 (29.7) | 1601 (46.4%) | 0.008 (-0.07, 0.08) |
| Current smoker | 42 (14.2%) | 450 (13.0%) | 0.02 (-0.08, 0.13) |
| Unknown | 48 (16.2%) | - | |
| Length of follow-up (days) | |||
| Mean (SD) | 331.9 (136.2) | 336.3 (132.9) | 0.0002 (-0.0001, |
| Median (IQR) | 328 (216-449) | 345 (219-441) | 0.0004) |
| Baseline HbA1c (%) Mean (SD) | 8.2 (1.8) | 7.7 (1.5) | 0.70 (0.68, 0.73) |
| Sub-groups (n (%)) | |||
| < 7.0% | 73 (24.7%) | 1156 (33.5%) | |
| 7.0-7.9% | 86 (29.1%) | 1106 (32.0%) | |
| 8.0-8.9% | 59 (19.9%) | 620 (18.0%) | |
| > 9.0% | 78 (26.4%) | 572 (16.6%) | |
| Final value (mean) (SD) | 7.8 (1.6) | 7.7 (1.5) | |
| Mean change (SD) | -0.4 (1.4) | -0.03 (1.1) | |
| Difference in final values (intervention - control) (95% CI) | +0.11 (-0.07, 0.29) | ||
| Adjusted mean difference in final HbA1c values between intervention and control (%) (95%CI)* | -0.25 (-0.38, -0.11) | ||
| Adjusted mean difference in final HbA1c values between intervention and control by sub-group of baseline values (95%CI) (%) | |||
| < 7.0% | 0.2 (-0.01, 0.4) | ||
| 7.0-7.9% | -0.3 (-0.6, -0.1) | ||
| 8.0-8.9% | -0.3 (-0.6, 0.1) | ||
| > 9.0% | -0.6 (-1.0, -0.2) | ||
* adjusted for age, sex, baseline values, smoking status, length of follow-up