Table 2. Reduction of BP From Baselinea.
| Variable | BP in TI Group, mm Hg | BP in UC Group, mm Hg | Differential Change From Baseline, mm Hg | P Valueb | ||
|---|---|---|---|---|---|---|
| Mean (95% CI) | Reduction From Baseline, Mean (95% CI) | Mean (95% CI) | Reduction From Baseline, Mean (95% CI) | |||
| Systolic BP | ||||||
| Baseline | 148.2 (146.3 to 150.0) | NA | 147.7 (145.8 to 149.5) | NA | NA | NA |
| 6 mo | 126.7 (124.4 to 129.0) | −21.5 (−23.9 to −19.1) | 136.9 (134.6 to 139.2) | −10.8 (−13.3 to −8.3) | −10.7 (−14.3 to −7.3) | <.001 |
| 12 mo | 125.7 (123.4 to 128.0) | −22.5 (−25.1 to −19.9) | 134.8 (132.5 to 137.2) | −12.9 (−15.5 to −10.2) | −9.7 (−13.4 to −6.0) | <.001 |
| 18 mo | 126.9 (124.3 to 129.4) | −21.3 (−24.2 to −18.4) | 133.0 (130.4 to 135.5) | −14.7 (−17.6 to −11.8) | −6.6 (−10.7 to −2.5) | .004 |
| 54 mo | 130.6 (128.2 to 133.0) | −17.6 (−20.3 to −15.0) | 132.6 (130.2 to 134.9) | −15.1 (−17.7 to −12.5) | −2.5 (−6.3 to 1.2) | .18 |
| Diastolic BP | ||||||
| Baseline | 84.4 (82.3 to 86.6) | NA | 85.1 (82.9 to 87.3) | NA | NA | NA |
| 6 mo | 75.0 (72.9 to 77.2) | −9.4 (−11.1 to −7.6) | 81.7 (79.5 to 84.0) | −3.4 (−5.2 to −1.5) | −6.0 (−8.6 to −3.4) | <.001 |
| 12 mo | 75.1 (72.8 to 77.4) | −9.3 (−11.0 to −7.7) | 80.8 (78.5 to 83.2) | −4.3 (−5.9 to −2.7) | −5.1 (−7.4 to −2.8) | <.001 |
| 18 mo | 75.1 (73.0 to 77.2) | −9.3 (−11.7 to −7.0) | 78.7 (76.6 to 80.9) | −6.4 (−8.7 to −3.9) | −3.0 (−6.3 to 0.3) | .07 |
| 54 mo | 77.5 (75.6 to 79.4) | −7.0 (−8.5 to −5.4) | 79.1 (77.2 to 81.0) | −6.0 (−7.5 to −4.4) | −1.0 (−3.2 to 1.2) | .37 |
Abbreviations: BP, blood pressure; NA, not applicable; TI, telemonitoring intervention; UC, usual care.
a
Blood pressure results from baseline and 6, 12, and 18 months were previously reported in the study by Margolis et al.15
b
Calculated using the treatment group by time interaction term, indicating a differential reduction from baseline by study group.