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. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: Circ Heart Fail. 2010 Jan 26;3(2):253–260. doi: 10.1161/CIRCHEARTFAILURE.109.899526

Table 2.

Serum potassium <4 mEq/L and outcomes in patients with chronic HF and CKD

Events (%); rate per 10,000 person-years Absolute rate difference* (per 10,000 person-years) HR (95% CI) P value
Outcomes Serum potassium 4–4.9 mEq/L (N=522) Serum potassium <4 mEq/L (N=522)
Mortality
All-cause 187 (36%); 1276 249 (48%); 1864 + 587 1.56 (1.25–1.95) <0.001
Cardiovascular 145 (28%); 990 204 (39%); 1527 + 537 1.65 (1.29–2.11) <0.001
Progressive HF 71 (14%); 485 111 (21%); 831 + 346 1.82 (1.28–2.57) <0.001
Hospitalization
All-cause 358 (69%); 4403 376 (72%); 5288 + 885 1.16 (1.00–1.35) 0.036
Cardiovascular 275 (53%); 2753 309 (59%); 3657 + 904 1.27 (1.08–1.50) 0.004
Worsening HF 177 (34%); 1451 203 (39%); 1931 + 481 1.29 (1.05–1.58) 0.014
*

Absolute differences in rates of events per 10,000 person-year of follow up were calculated by subtracting the event rates in the serum potassium 4–4.9 mEq/L group from the event rates in the serum potassium <4 mEq/L group