Table 2.
Comparison of blood pressure changes between and within groups.
| Vital Signs | Acupuncture Group (n = 61) | Control Group (n = 61) |
Mean Difference a | p b |
|---|---|---|---|---|
| SBP | ||||
| Baseline | 130.2 (127.7, 132.8) | 128.4 (125.6, 131.1) | ||
| After 2 years | 119.9 (117.1, 122.7) | 125.4 (121.2, 129.6) | −6.44 (−11.17, −1.71) | 0.008 ** |
| Difference | −10.34 (−13.55, −7.14) | −2.92 (−6.93, 1.10) | ||
| p c | <0.001 *** | 0.151 | ||
| DBP | ||||
| Baseline | 84.6 (82.9, 86.2) | 83.9 (82.1. 85.2) | ||
| After 2 years | 74.6 (72.7, 76.6) | 81.5 (78.6, 84.3) | −7.53 (−10.52, −4.55) | <0.001 *** |
| Difference | −9.92 (−11.89, −7.96) | −2.16 (−4.49, 0.16) | ||
| p c | <0.001 *** | 0.068 |
Abbreviation: SBP, systolic blood pressure; DBP, diastolic blood pressure. a = Least squares mean difference using analysis of covariance (ANCOVA); b = p-value from ANCOVA; c = p-value from paired t-test; ** p < 0.01; and *** p < 0.001.