Table I.

Summary of Meta‐Analyses of Potassium Trials

Meta‐Analysis	No. of Trials	Intervention	Average Duration	Mean BP Lowering (SBP/DBP), mm Hg	95% CI
Cappucio, 1991 25	19	100 mmol/d diet; 48–120 mmol/d KCl; 66 mmol/d K Glu +Cit	39 d	5.9/3.4	−6.6 to –5.2
					−4.0 to 2.8
Whelton, 1997 26	33	100–200 mmol/d diet; 60–120 mmol/d Kcl; 120 mmol/d K Cit + Bicarb	5 wk	3.1/2.0	−1.9 to –4.3
					−0.5 to –3.4
Geleijnse, 2003 27	27	44 mmol (1.7 g) (form not given)	>2 wk	2.4/1.6	−3.8 to –1.0
					−2.7 to –0.5
Dickinson, 2006 28	5	>100 mmol/d diet; 48–120 mmol/d Kcl; 120 mmol/d K Cit + Bicarb	>8 wk	11.2/5.0	−25.2 to 2.7
					−12.5 to 2.4
Abbreviations: BP, blood pressure; CI, confidence interval; DBP, diastolic blood pressure; SBP, systolic blood pressure. Forms of K+ include Kcl, citrate (Cit), gluconate (Glu), and bicarbonate (Bicarb). One Meq or mmol of K+ equals 39.09 mg.