Table 1

Baseline Characteristics for Women in the ICD Registry and GWTG-HF Registry

Baseline CharacteristicAll Women Qualifying for Analysis1:1 Matched Women
GWTG-HF
(n = 2,675)
Registry
(n = 496)
% Standardized Differencep ValueGWTG-HF
(n = 490)
Registry
(n = 490)
% Standardized Differencep Value
Age, yrs80 (73, 85)75 (71, 80)55<0.000175 (71, 80)75 (71, 80)00.93
White race76% (2,010)70% (346)150.002072% (346)70% (342)50.46
LVEF, %28 (20, 32)25 (20, 30)49<0.000125 (20, 30)25 (20, 30)40.52
Ischemic heart disease64% (1,721)61% (303)70.1764% (312)61% (301)50.47
Prior atrial arrhythmia31% (823)39% (192)170.000638% (185)38% (187)10.90
Systolic BP, mm Hg138 (120, 156)130 (112, 147)32<0.0001131 (116, 148)130 (113, 147)30.54
Diabetes40% (1,082)48% (239)160.001446% (227)48% (236)40.56
Hypertension74% (1,982)85% (422)28<0.000185% (418)85% (416)10.86
ACE inhibitor or ARB73% (1,947)72% (355)10.8374% (361)73% (353)20.75
Beta blocker84% (2,245)87% (427)90.08287% (426)87% (421)00.95
Calcium channel blocker18% (417)8% (38)31<0.00017% (31)8% (38)10.85
Digoxin32% (752)33% (162)20.7332% (136)33% (160)20.77
Diuretic84% (2,031)83% (406)30.5884% (371)83% (401)40.50
Statin33% (864)54% (267)44<0.000154% (258)54% (261)00.99

Values are median (25th, 75th percentiles) and are compared with Wilcoxon rank sum tests or % (n) and are compared with Pearson chi-square tests.

The standardized difference is the absolute difference in means (or proportions) divided by the average standard deviation.

ACE = angiotensin-converting enzyme inhibitor; ARB = angiotensin II receptor blocker; BP = blood pressure; GWTG-HF = Get With The Guidelines for Heart Failure; ICD = implantable cardioverter-defibrillator; LVEF = left ventricular ejection fraction.