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)

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)

^¶ Adjusted for time of day ^#p < 0.001; ^§p = 0.008; **p = 0.015; *p = 0.037