Table 1.
Study sample characteristics at Year 25
| Self-reported HTN onset age | ||||||
|---|---|---|---|---|---|---|
| Characteristic | All | <35 y | 35–44 y | ≥45 y | No HTN | P value |
| N | 2,649 | 194 | 297 | 340 | 1,818 | |
| Age, years (SD) | 50.1 (3.6) | 49.8 (3.7) | 49.0 (3.7) | 51.8 (2.7) | 50.0 (3.6) | <0.001 |
| No. women (%) | 1,509 (57.0) | 122 (62.9) | 175 (58.9) | 191 (56.2) | 1,021 (56.2) | 0.28 |
| Black (%) | 1,262 (47.6) | 139 (71.7) | 216 (72.7) | 201 (59.1) | 706 (38.8) | <0.001 |
| BMI, kg/m2 (SD) | 25.2 (5.5) | 27.8 (6.1) | 27.8 (5.8) | 27.0 (5.8) | 24.2 (5.0) | <0.001 |
| Current smoker (%) | 440 (16.6) | 34 (17.5) | 57 (19.2) | 72 (21.2) | 277 (15.2) | 0.028 |
| Diabetes (%) | 236 (8.9) | 43 (22.2) | 54 (18.2) | 52 (15.3) | 87 (4.8) | <0.001 |
| Cholesterol, mmol/l (SD) | 5.0 (0.9) | 4.9 (1.1) | 4.8 (0.9) | 4.9 (1.0) | 5.1 (0.9) | <0.001 |
| HDL, mmol/l (SD) | 1.5 (0.5) | 1.5 (0.5) | 1.4 (0.4) | 1.5 (0.4) | 1.6 (0.5) | <0.001 |
| Systolic blood pressure, mm Hg (SD) | 118 (15.3) | 126 (16.5) | 126 (16.4) | 126 (16.8) | 115 (13.3) | <0.001 |
| Diastolic blood pressure, mm Hg (SD) | 73.7 (10.8) | 79.2 (12.0) | 79.4 (11.0) | 78.4 (10.9) | 71.3 (9.8) | <0.001 |
| Use of antihypertensive medication (%) | 677 (25.6) | 150 (77.3) | 248 (83.5) | 254 (74.7) | 25 (1.4) | <0.001 |
Abbreviations: BMI, body mass index; HDL, high-density lipoprotein; HTN, hypertension; SD, standard deviation.