Table 5.
Effect of Birmingham Own Health® Intervention on BMI among people with diabetes
| Intervention | Control | Multivariate linear regression coefficients (95%CI) |
|
|---|---|---|---|
| N | 307 | 2738 | |
| Mean age (years) (SD) | 63.1 (12.3) | 64.0 (11.1) | -0.03 (-0.04, -0.02) |
| Males (n (%)) | 166 (54.1) | 1457 (53.2) | -0.15 (-0.38, 0.07) |
| Smoking status | |||
| Never smoker | 111 (36.2%) | 1130 (41.3%) | 1.0 |
| Ex-smoker | 108 (35.2%) | 1274 (46.5%) | 0.23 (-0.01, 0.47) |
| Current smoker | 44 (14.3%) | 334 (12.2%) | -0.23 (-0.59, 0.11) |
| Unknown | 44 (14.3%) | - | |
| Length of follow-up (days) | |||
| Mean (SD) | 296.2 (139.1) | 307.3 (131.4) | 0.0002 (-0.0007, 0.001) |
| Median (IQR) | 314 (191, 390) | 298 (173, 390) | |
| Baseline BMI (kg/m2) Mean (SD) |
31.2 (7.1) | 30.9 (7.3) | 0.90 (0.88, 0.91) |
| Sub-groups (n (%)) | |||
| < 25 | 49 (16.0%) | 424 (15.5%) | |
| 25-29 | 97 (31.6%) | 938 (34.3%) | |
| 30-34 | 85 (27.7%) | 765 (27.9%) | |
| 35-39 | 50 (16.3%) | 360 (13.1%) | |
| > 40 | 26 (8.5%) | 251 (9.2%) | |
| Final BMI (kg/m2) (mean) (SD) | 30.7 (6.4) | 31.1 (7.3) | |
| Mean change in BMI (kg/m2) (SD) | -0.5 (3.6) | 0.2 (3.0) | |
| Difference in final BMI (kg/m2) (intervention - control) (95% CI) | -0.4 (-1.3, 0.4) | ||
| Adjusted mean difference in final BMI between intervention and control (kg/m2) (95%CI)* | -0.7 (-1.0, -0.3) | ||
| Adjusted mean difference in final BMI between intervention and control by sub-group of baseline values (kg/m2) (95%CI) | |||
| < 25 | 0.5 (-0.2, 1.2) | ||
| 25-29 | -0.5 (-0.8, -0.2) | ||
| 30-34 | -0.7 (-1.4. 0.0) | ||
| 35-39 | -1.4 (-2.1, -0.6) | ||
| ≥ 40 | -2.9 (-5.7, -0.1) | ||
* adjusted for age, sex, baseline values, smoking status, length of follow-up