. 2017 Apr 9;2017(4):CD004022. doi: 10.1002/14651858.CD004022.pub4

2. Differences in BP effects of reduced sodium intake at different time points in longitudinal studies.

Comparison	References	SBP diff. (95% CI)	P	DBP diff. (95% CI)	P
Week 1 vs.2	1070 Parker 1990;1180 Palacios 2004;1183 Gates 2004;1188 Swift 2005	‐0.18 (‐3.03 to 2.67)	0.90	0.12 (‐2.53 to 2.77)	0.93
Week 1 vs.4	1070 Parker 1990;1088 Ruppert 1993;1128 Schorr 1996;1180 Palacios 2004;1183 Gates 2004;1186 Forrester 2005 N	‐0.50 (‐3.20 to 2.20)	0.72	0.35 (‐2.02 to 2.72)	0.77
Week 2 vs.4	1011 MacGregor 1982;1039 ANHMRCDS 1986;1055 ANHMRCDS 1989;1070 Parker 1990;1075 Mascioli 1991;1082 Cobiac 1992 1097 Nestel 1993;1100 Fotherby 1993;1080 Huggins 1992;1183 Gates 2004;1186 Forrester 2005 N;1201 Nowson 2009	‐0.10 (‐1.88 to 1.68)	0.91	‐0.20 (‐1.12 to 0.72)	0.67
Week 2 vs.6	1039 ANHMRCDS 1986;1055 ANHMRCDS 1989;1085 Sciarrone 1992;1097 Nestel 1993;1201 Nowson 2009	‐0.50 (‐2.66 to 1.66)	0.65	‐0.42 (‐1.69 to 0.85)	0.52
Week 4 vs.6	1039 ANHMRCDS 1986;1055 ANHMRCDS 1989;1085 Sciarrone 1992;1097 Nestel 1993;1201 Nowson 2009	0.39 (‐1.77 to 2.55)	0.72	‐0.22 (‐1.50 to 1.06)	0.74