Cardiovascular risk management and its impact on hypertension control in primary care in low-resource settings: a cluster-randomized trial
Shanthi Mendis, S Claiborne Johnston, Wu Fan, Olulola Oladapo, Ali Cameron & Mohammed F Faramawi
Volume 88, Number 6, June 2010, 412-419
Table 2. Risk distribution of sample at follow-up visits among participants in a clinical trial of the World Health Organization risk management package for cardiovascular disease, China and Nigeria, 2005–2006
| Characteristic | Site Aa |
Site Bb |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Intervention (n = 603) |
Control (n = 606) |
Intervention (n = 588) |
Control (n = 600) |
||||||||
| No. | % | No. | % | No. | % | No. | % | ||||
| 4 month follow-up | |||||||||||
| Attended visit | 601 | 99.7 | 605 | 99.8 | 588 | 100.0 | 598 | 99.7 | |||
| Low riskc | 104 | 17.3 | 80 | 13.2 | 136 | 23.1 | 96 | 16.1 | |||
| Medium riskd | 484 | 80.5 | 516 | 85.3 | 444 | 75.5 | 483 | 80.8 | |||
| SBP > 179 mmHge | 13 | 2.2 | 7 | 1.2 | 8 | 1.4 | 15 | 2.5 | |||
| Missing data | 0 | 0.0 | 2 | 0.3 | 0 | 0.0 | 4 | 0.7 | |||
| 8 month follow-up | |||||||||||
| Attended visit | 597 | 99.0 | 605 | 99.8 | 588 | 100.0 | 596 | 99.3 | |||
| Low riskf | 459 | 76.9 | 505 | 83.5 | 382 | 65.0 | 280 | 47.0 | |||
| Medium riskg | 138 | 23.1 | 99 | 16.4 | 206 | 35.0 | 315 | 52.9 | |||
| Missing data | 0 | 0.0 | 1 | 0.2 | 0 | 0.0 | 1 | 0.2 | |||
| 12 month follow-up | |||||||||||
| Attended visit | 584 | 96.8 | 605 | 99.8 | 530 | 90.1 | 447 | 74.5 | |||
mmHg, millimetres of mercury; SBP, systolic blood pressure.
a China.
b Nigeria.
c SBP < 150 mmHg, and age ≤ 50, and non-smoker.
d SBP 150–179 mmHg; or SBP < 150 mmHg and age > 50; or SBP < 150 mmHg and smoker; or SBP < 150 mmHg and age > 50 and smoker.
e Referred to higher level of care.
f SBP < 150 mmHg.
g SBP ≥ 150 mmHg.