Table 1

Baseline Participant Demographic and Clinical Characteristics

60ftWT and 6MWT (n = 130)Only 60ftWT (n = 7)Neither WT Attempted (n = 7)
Age, yrs56.8 ± 11.365.4 ± 15.261.7 ± 7.8
Women28 (22)1 (14)4 (57)
African American93 (72)2 (29)6 (86)
BMI, kg/m230.7 ± 7.435.7 ± 7.728.9 ± 7.9
Coronary artery disease60 (46)5 (71)2 (29)
Systolic blood pressure, mm Hg122 ± 20126 ± 18112 ± 15
Diastolic blood pressure, mm Hg76 ± 1373 ± 975 ± 13
Heart rate, beats/min70 ± 1475 ± 576 ± 10
NYHA functional class
 II73 (56)4 (57)3 (43)
 III55 (42)3 (43)3 (43)
 IV2 (2)0 (0)1 (14)
Ejection fraction, %23 ± 723 ± 1225 ± 8
B-type natriuretic peptide, pg/ml456 ± 621656 ± 1,041576 ± 743
Serum creatinine, mg/dl1.4 ± 0.71.1 ± 0.31.7 ± 0.6
Current smoker38 (29)0 (0)2 (29)
Diabetes mellitus56 (43)6 (86)3 (43)
Renal disease30 (23)1 (14)3 (43)
Hyperlipidemia75 (58)5 (71)4 (57)
Hypertension103 (79)5 (71)6 (86)
Atrial fibrillation27 (21)3 (43)2 (29)
History of VT/VF cardiac arrest14 (11)1 (14)1 (14)
Comorbidities affecting walking
 Gout/leg ulcers17 (13)3 (43)2 (29)
 Musculoskeletal abnormalities21 (16)2 (29)2 (29)
 Nerve disorders affecting locomotion5 (4)0 (0)0 (0)
Medications
 Beta-blocker121 (93)7 (100)7 (100)
 ACE inhibitor101 (78)5 (71)6 (86)
 Angiotensin-II receptor blocker20 (15)1 (14)1 (14)
 Calcium-channel blocker17 (13)2 (29)0 (0)
 Diuretic108 (83)7 (100)6 (86)
Reasons for not attempting WT
 Extreme fatigue3 (43)1 (14)
 Musculoskeletal pain2 (29)4 (57)
 Time constraints2 (29)2 (29)
WT
 60ftWT total completion time, s26 (22–30)40 (29–45)
 6MWT total distance, m331 (269–370)
Events, number of patients
 HF hospitalization42 (32)2 (29)3 (43)
 Death (all-cause)12 (9)3 (43)2 (29)

Values are mean ± SD, n (%), or median (interquartile range). Percentages represent the proportion of patients within each subgroup (i.e., column).

ACE = angiotensin-converting enzyme; BMI = body mass index; HF = heart failure; NYHA = New York Heart Association; 6MWT = 6-min-walk test; 60ftWT = 60-foot-walk test; VF = ventricular fibrillation; VT = ventricular tachycardia; WT = walk test.

  • There were no patients who were able to complete the 6MWT, but not the 60ftWT.

  • Includes 1 Native American participant.