Table 5.
Fixed-effects analysis of the relationship between antihypertensive medication treatment and blood pressure control.
| Variable (Reference) | SBP-Model 1 | SBP-Model 2 | DBP-Model 1 | DBP-Model 2 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| β | 95% CI | β | 95% CI | β | 95% CI | β | 95% CI | |||||
| Main effects | ||||||||||||
| Treatment (no) | −13.483 | −15.672 | −11.293 | −16.115 | −28.382 | −3.848 | −5.367 | −6.390 | −4.344 | −8.326 | −14.048 | −2.604 |
| Age | −0.386 | −0.674 | −0.097 | −0.388 | −0.677 | −0.100 | −0.121 | −0.255 | 0.013 | −0.121 | −0.255 | 0.013 |
| PCE, Quintile 1st | ||||||||||||
| 2nd | −3.125 | −5.419 | −0.830 | −1.736 | −5.400 | 1.928 | −0.508 | −1.576 | 0.560 | −0.002 | −1.710 | 1.707 |
| 3rd | 0.025 | −2.338 | 2.388 | 2.094 | −1.664 | 5.853 | −0.215 | −1.316 | 0.885 | 0.150 | −1.604 | 1.903 |
| 4th | 0.313 | −2.179 | 2.806 | 2.757 | −1.035 | 6.548 | −0.231 | −1.392 | 0.931 | −0.441 | −2.213 | 1.331 |
| 5th | −2.066 | −4.740 | 0.608 | −0.190 | −4.574 | 4.193 | −0.197 | −1.442 | 1.047 | 0.402 | −1.642 | 2.446 |
| BMI | 0.126 | −0.221 | 0.474 | 0.005 | −0.448 | 0.457 | 0.175 | 0.013 | 0.336 | 0.084 | −0.126 | 0.295 |
| Comorbidity (no) | −1.353 | −4.980 | 2.275 | −1.400 | −5.839 | 3.039 | −1.853 | −3.545 | −0.162 | −1.596 | −3.673 | 0.481 |
| Smoking (no) | 3.492 | −0.586 | 7.569 | 3.327 | −0.759 | 7.413 | 0.130 | −1.773 | 2.032 | 0.133 | −1.773 | 2.040 |
| Drinking (no) | 1.527 | −1.084 | 4.139 | 1.512 | −1.101 | 4.125 | 0.980 | −0.236 | 2.196 | 0.975 | −0.242 | 2.192 |
| Interaction effects | ||||||||||||
| Treatment × PCE | ||||||||||||
| Treatment × 2nd | −2.381 | −7.080 | 2.318 | −0.815 | −3.006 | 1.376 | ||||||
| Treatment × 3rd | −3.459 | −8.169 | 1.251 | −0.629 | −2.824 | 1.566 | ||||||
| Treatment × 4th | −4.090 | −8.879 | 0.698 | 0.353 | −1.882 | 2.587 | ||||||
| Treatment × 5th | −3.078 | −8.323 | 2.167 | −0.885 | −3.329 | 1.559 | ||||||
| Treatment × BMI | 0.204 | −0.262 | 0.670 | 0.146 | −0.072 | 0.363 | ||||||
| Treatment × Comorbidity | 0.134 | −4.080 | 4.348 | −0.423 | −2.396 | 1.550 | ||||||
| Constant | 176.336 | 156.896 | 195.776 | 178.044 | 157.463 | 198.625 | 91.426 | 82.380 | 100.471 | 93.207 | 83.630 | 102.784 |
Note: SBP, systolic blood pressure; DBP, diastolic blood pressure; PCE, per capita household annual consumption expenditure; BMI, body mass index; 95% CI, 95% confidence interval. All models were adjusted for age, living standard, BMI, comorbidity, smoking and drinking alcohol. Models 1 included only main-effects terms for all variables; Models 2 included both main-effects terms and interaction-effects terms for treatment and household consumption expenditure, BMI and comorbidity. × refers to the interaction term.