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Table 5 Regression coefficients (and 95% C.I.) for changes in blood pressure for a given change in sodium excretion adjusted for age, sex, locality, body mass index (random effect model)

From: A community programme to reduce salt intake and blood pressure in Ghana [ISRCTN88789643]

Unit change Month Systolic B.P. (mmHg) Diastolic B.P. (mmHg)
50 mmol of 24 h urinary sodium 3 2.12 (1.03 to 3.21)# 1.11 (0.45 to 1.78)#
  6 1.34 (0.08 to 2.60)* 0.30 (-0.45 to 1.04)
Unit of sodium: creatinine ratio 3 0.33 (0.15 to 0.51)# 0.14 (0.03 to 0.25)**
  6 0.30 (0.08 to 0.53)§ 0.03 (-0.10 to 0.17)
Unit of sodium: potassium ratio 3 1.59 (0.73 to 2.46)# 0.48 (-0.05 to 1.00)
  6 1.94 (0.97 to 2.90)# 0.47 (-0.11 to 1.04)
  1. Adjusted for time of day #p < 0.001; §p = 0.008; **p = 0.015; *p = 0.037