Crude and adjusted associations between blood pressure control and medication usage.
| Variable | Blood pressure uncontrolled n (%) | Blood pressure controlled n (%) | Crude odds ratio | 95% CI | Adjusted odds ratioa | 95% CI |
|---|---|---|---|---|---|---|
| Medication total | ||||||
| 1 | 61 (49) | 64 (51) | 1 | |||
| 2 | 106 (46) | 123 (54) | 0.90 | 0.58 to 1.40 | 0.94 | 0.57 to 1.55 |
| ≥3 | 94 (52) | 88 (48) | 1.12 | 0.71 to 1.77 | 1.26 | 0.78 to 2.03 |
| Drug modifications | ||||||
| 0 | 71 (44) | 92 (56) | 1 | |||
| 1 | 57 (55) | 44 (45) | 1.68 | 1.01 to 2.78 | 1.68 | 1.01 to 2.79 |
| 2 | 40 (47) | 45 (53) | 1.15 | 0.68 to 1.95 | 1.17 | 0.66 to 2.06 |
| ≥3 | 93 (50) | 94 (50) | 1.28 | 0.84 to 1.96 | 1.33 | 0.89 to 1.99 |
| Drug changes | ||||||
| 0 | 180 (47) | 204 (53) | 1 | |||
| 1 | 59 (54) | 50 (46) | 1.34 | 0.87 to 2.05 | 1.38 | 0.98 to 1.95 |
| ≥2 | 22 (51) | 21 (49) | 1.19 | 0.63 to 2.23 | 1.11 | 0.62 to 2.00 |
| Drug intensifications | ||||||
| 0 | 77 (44) | 98 (56) | 1 | |||
| 1 | 64 (54) | 53 (46) | 1.54 | 0.96 to 2.47 | 1.57 | 1.22 to 2.03 |
| 2 | 42 (48) | 45 (52) | 1.19 | 0.71 to 1.99 | 1.20 | 0.78 to 1.82 |
| ≥3 | 78 (50) | 79 (50) | 1.26 | 0.81 to 1.94 | 1.32 | 0.91 to 1.92 |
| Drug diminutions | ||||||
| 0 | 180 (48) | 194 (52) | 1 | |||
| 1 | 52 (47) | 56 (53) | 1.00 | 0.66 to 1.54 | 1.06 | 0.66 to 1.70 |
| ≥2 | 29 (54) | 25 (46) | 1.25 | 0.70 to 2.22 | 1.26 | 0.71 to 2.26 |
Blood pressure control = <150/90 mmHg. CI = confidence interval. Odds ratio >1 = association with worse blood pressure control; <1 = association with improved blood pressure control.
Adjusted for age band and number of comorbidities.
Drug modifications are classed as the total of drug changes and drug intensifications combined.
Drug changes are classed as changing one class of drug for another or stopping a drug and replacing it with another from the same class.
Drug intensifications are classed as adding in a new drug or increasing a drug dosage.
Drug diminutions are classed as stopping a drug and not replacing it or decreasing a drug dosage.