Table 1. Baseline characteristics in British women and men aged 60–79 years without cardiovascular disease by categories of hypertension amongst women. N = 3182.
| Characteristic | Number with complete data | Mean (SD) for continuous variables or N (%) for binary variables in: | P for heterogeneity across categories* | |||
| Normotensive | Untreated HT | Treated and poorly controlled HT | Treated and well controlled HT | |||
| Number in each category | 3182 | 744 | 1641 | 697 | 101 | - |
| Age (years) | 3182 | 66.3 (5.0) | 68.9 (5.4) | 69.8 (5.4) | 66.8 (5.0) | <0.0005 |
| Systolic BP (mmHg) | 3182 | 124.9 (11.0) | 164.7 (18.8) | 169.6 (19.1) | 129.0 (9.1) | <0.0005$ |
| Diastolic BP (mmHg) | 3182 | 69.7 (7.8) | 82.7 (10.5) | 84.3 (11.0) | 71.7 (7.6) | <0.0005$ |
| Body mass index (kg/m2) | 3159 | 26.4 (4.3) | 27.2 (4.7) | 28.5 (5.2) | 29.8 (5.1) | <0.0005$ |
| Fasting glucose** | 3055 | 5.7 (4.3, 7.8) | 5.9 (4.2, 8.1) | 6.1 (4.1, 9.2) | 6.0 (3.7, 9.6) | <0.0005$ |
| Fasting Insulin** | 3086 | 5.9 (1.8, 19.6) | 6.7 (1.9, 23.2) | 7.6 (2.0, 29.2) | 8.6 (1.9, 38.2) | <0.0005$ |
| Fasting HDLc | 3067 | 1.7 (0.4) | 1.7 (0.5) | 1.6 (0.4) | 1.5 (0.3) | <0.0005 |
| Fasting LDLc | 3002 | 4.1 (1.0) | 4.3 (1.1) | 4.2 (1.1) | 4.1 (1.1) | 0.003 |
| Fasting Triglyceride** | 3073 | 1.5 (0.6, 3.4) | 1.6 (0.7, 4.0) | 1.9 (0.8, 4.6) | 1.7 (0.8, 3.9) | <0.0005 |
| Current smoker (%)† | 3180 | 112 (15%) | 186 (11%) | 49 (7%) | 8 (8%) | <0.0005 |
| No regular exercise (%) | 3082 | 23 (3%) | 69 (4%) | 43 (6%) | 5 (5%) | 0.05 |
| Manual childhood social class (%)$$ † | 2828 | 489 (74%) | 1105 (76%) | 474 (77%) | 75 (82%) | 0.2 |
| Manual adult social class (%)$$ † | 2905 | 202 (30%) | 535 (35%) | 235 (38%) | 27 (30%) | 0.02 |
| On ≥2 blood-pressure drugs (%) | N/A*** | - | - | 218 (31%) | 32 (32%) | - |
In this table results are only presented for those with complete data, and for those with non-missing hypertensive status; HT = Hypertensive.
*i.e. the p-value tests whether the distribution differs between any of the groups and has 3 degrees of freedom.
**For these variables geometric means and 95% confidence intervals are presented.
$
Using robust standard errors to account for differences in variances between groups.
$$
Manual social class defined as social class III manual/class IV/class V/armed forces.
†
Included as categorical covariable with all levels (never/ex/current smoker, all levels of social class) in analysis.
***Response not required if not on drugs.