Table 3 Effect of Birmingham Own Health^® Intervention on diastolic and systolic blood pressure among people with diabetes

N

288

4789

Mean age (years) (SD)

63.3 (12.4)

65.3 (11.2)

-0.13 (-0.15, -0.11)

0.12 (0.08, 0.16)

Males (n (%))

155 (53.8%)

2532 (52.9%)

0.26 (-0.26, 0.79)

-0.12 (-1.02, 0.78)

Smoking status

Never smoker

119 (41.3%)

1963 (41.0%)

1.0

1.0

Ex-smoker

99 (34.4%)

2256 (47.1%

-0.55 (-1.11, 0.006)

-0.07 (-1.03, 0.89)

Current smoker

34 (11.8%)

570 (11.9%)

-1.36 (-2.20, -0.51)

0 (-1.44, 1.44)

Unknown

36 (12.5%)

-

Length of follow-up (days)

Mean (SD)

321.6 (143.4)

325.7 (139.5)

-0.0006 (-0.002, 0.001)

0.001 (-0.002, 0.004)

Median (IQR)

321 (184, 445.5)

338 (198, 440)

Baseline diastolic blood pressure (mmHg) Mean (SD)

8.2 (1.8)

7.7 (1.5)

0.38 (0.36, 0.41)

-

Sub-groups (n (%))

< 80 mmHg

145 (50.3%)

2645 (55.2%)

80-89 mmHg

107 (37.2%)

1688 (35.2%)

90-99 mmHg

24(8.3%)

385 (8.0%)

> 100 mmHg

12 (4.2%)

71 (1.5%)

Baseline systolic blood pressure (mmHg) Mean (SD)

139.6 (18.0)

138.3 (14.6)

-

0.39 (0.36, 0.42)

Sub-groups (n (%))

< 120 mmHg

27 (9.4%)

341 (7.1%)

120-129 mmHg

48 (16.7%)

755 (15.8%)

130-139 mmHg

80 (27.8%)

1346 (28.1%)

140-149 mmHg

71 (24.7%)

1389(29.0%)

> 150 mmHg

62 (21.5%)

958 (20.0%)

Final value (mean) (SD) (mmHg)

Diastolic blood pressure

75.2 (9.3)

76.1 (10.2)

Systolic blood pressure

134.6 (15.9)

137.6 (16.8)

Mean change (SD) (mmHg)

Diastolic blood pressure

-3.3 (11.7)

-0.6 (10.8)

Systolic blood pressure

-5.0 (19.0)

-0.7 (17.8)

Difference in final values (mmHg)

(intervention - control) (95% CI)

Diastolic blood pressure

-0.9 (-2.1, 0.3)

Systolic blood pressure

-3.0 (-5.0, -1.0)

Adjusted mean difference in final blood pressure

between intervention and control*

(mmHg) (95%CI)

-1.6 (-2.7, -0.4)

-3.5 (-5.5, -1.5)

Adjusted mean difference in final blood pressure between

intervention and control by sub-group of baseline values

(95%CI) (mmHg)

< 80 mmHg -1.0 (-2.6, 0.6)

80-89 mmHg -1.6 (-3.5, 0.3)

90-99 mmHg -3.1 (-7.7, 1.5)

≥ 100 mmHg -0.1 (-8.4, 8.2)

< 120 mmHg -1.9 (-8.1, 4.4)

120-129 mmHg -2.7 (-7.4, 1.9)

130-139 mmHg -1.6 (-5.2, 2.0)

140-149 mmHg -4.6 (-8.5, -0.8)

≥ 150 mmHg -5.4 (-10.4, -0.4)