Table 2. Blood pressure at baseline and follow-up, reduction of blood pressure in each group and net reduction of blood pressure in salt substitute group in comparison with regular salt group.
| Variables | Groups | Baseline | Follow-up | △1a | △2b | p-value | |
| Per-protocol Analysis, (N = 213) | |||||||
| SBP | Regular salt | 179.3 (23.6) | 171.6 (27.1) | −7.7 (22.3) | −8.2 (2.9) | 0.005 | |
| Salt substitute | 174.1 (20.6) | 157.3 (25.7) | −16.9 (21.0) | ||||
| DBP | Regular salt | 106.7 (13.5) | 103.3 (14.1) | −3.4 (11.3) | −3.4 (1.5) | 0.023 | |
| Salt substitute | 102.2 (12.0) | 95.4 (14.8) | −6.8 (11.1) | ||||
| Intent-to-treat Analysis with multiple imputations approach, (N = 282) c | |||||||
| SBP | Regular salt | 177.6 (23.3) | 170.2 (26.8) | −7.5 (21.8) | −7.6 (2.5) | 0.003 | |
| Salt substitute | 176.1 (22.4) | 161.0 (27.0) | −15.2 (21.7) | ||||
| DBP | Regular salt | 105.8 (13.1) | 102.6 (13.8) | −3.2 (11.1) | −3.5 (1.4) | 0.011 | |
| Salt substitute | 103.2 (12.0) | 97.0 (14.5) | −6.2 (11.5) | ||||
All numbers shown are mean (SD) except for the △2 that is shown in mean (SE).
a.
Mean reduction of blood pressure in each group after intervention.
b.
Net reduction of blood pressure in salt-substitute group in comparison with regular salt group, adjusting for baseline blood pressure, sex, age, township, baseline BMI and using blood pressure lowering agents.
c.
impute 10 times.