Table 6.

Mortality HR by quintiles of serum digoxin level

QuintileSerum Digoxin Level (ng/ml)nHR (95% CI)
1<0.603811.00 (reference)
20.60 to 0.874160.97 (0.78 to 1.20)
30.88 to 1.193851.11 (0.90 to 1.37)
41.20 to 1.554101.04 (0.84 to 1.28)
5>1.553931.43 (1.17 to 1.76)