Table 1.
Baseline characteristics according to blood pressure classification at 12 months. Values are numbers (percentages unless stated otherwise)
| Characteristic
|
“Maintain normotension” (n=181)
|
“Return to hypertension” (n=273)
|
“Return to hypertension early” (<70 days) (n=135)
|
“Return to hypertension late” (⩾70 days) (n=138)
|
|---|---|---|---|---|
| Sex: | ||||
| Female | 95 (52.5) | 161 (59.0) | 72 (53.3) | 89 (64.5) |
| Male | 86 (47.5) | 112 (41.0) | 63 (46.7) | 49 (35.5) |
| Median (range) age (years) | 70.0 (65.0-84.0) | 71.0 (65.0-84.0) | 72.0 (65.0-84.0) | 71.0 (65.0-82.0) |
| Mean (SD) pretreatment blood pressure (mm Hg): | ||||
| Systolic | 169.8 (20.0) | 169.4 (18.1) | 171.6 (17.7) | 167.5 (18.4) |
| Diastolic | 93.7 (10.2) | 94.5 (9.6) | 94.6 (9.7) | 94.5 (9.6) |
| Mean (SD) on-treatment blood pressure (mm Hg): | ||||
| Systolic | 135.3 (13.0) | 141.4 (13.6) | 143.5 (13.4) | 139.3 (13.5) |
| Diastolic | 76.0 (8.9) | 77.0 (7.8) | 77.5 (7.9) | 76.5 (7.8) |
| Mean arterial | 95.7 (8.9) | 98.4 (8.3) | 99.5 (8.0) | 97.4 (8.6) |
| Pulse pressure | 59.3 (11.6) | 64.4 (12.1) | 66.0 (12.8) | 62.9 (11.2) |
| Other cardiovascular disease risk factors: | ||||
| Mean (SD) body mass index (kg/m2) | 26.9 (3.4) | 27.3 (4.1) | 27.0 (4.0) | 27.5 (4.2) |
| Mean (SD) waist:hip ratio | 0.9 (0.1) | 0.9 (0.1) | 0.9 (0.1) | 0.9 (0.1) |
| Raised cholesterol concentration | 102 (56.4) | 118 (43.2) | 49 (36.3) | 69 (50.0) |
| Diabetes mellitus | 16 (8.8) | 20 (7.3) | 11 (8.1) | 9 (6.5) |
| Smoker | 13 (7.2) | 12 (4.4) | 8 (5.9) | 4 (2.9) |
| Family history of heart disease | 99 (54.7) | 145 (53.1) | 67 (49.6) | 78 (56.5) |
| Personal history cardiovascular disease* | 42 (23.2) | 47 (17.2) | 22 (16.3) | 25(18.1) |
| Previous single drug treatment | 141 (77.9) | 173 (63.4) | 84 (62.2) | 89 (64.5) |
| Mean (SD) plasma creatinine (μmol/l) | 86.1 (16.9) | 88.5 (22.1) | 89.4 (21.4) | 87.7 (22.8) |
| Alcohol intake: | ||||
| Heavy | 64 (35.4) | 81 (29.7) | 41 (30.4) | 40 (29.0) |
| Moderate | 83 (45.9) | 95 (34.8) | 49 (36.3) | 46 (33.3) |
| Never drink | 28 (15.5) | 78 (28.6) | 36 (26.7) | 42 (30.4) |
| Recent exercise | 166 (92.7) | 236 (90.1) | 116 (89.2) | 120 (90.9) |
*
Angina, claudication, stroke, myocardial infarction, coronary artery bypass grafting, or coronary angioplasty.