Table 1.
Characteristics of HD study participants, by measured baseline gait speed
| Unable to perform walk (n=83) |
<0.6 m/s (n=94) |
0.6–<0.8 m/s (n=139) |
0.8–<1.0 m/s (n=208) |
≥1.0 m/s (n=228) |
|
|---|---|---|---|---|---|
| Male sex | 46 | 40 | 51.8 | 63.5 | 73.7 |
| Age (y) | 64.7 (12.9) | 65.0 (12.9) | 60.1 (13.4) | 56.8 (13.5) | 50.0 (12.7) |
| Race | |||||
| White | 34 | 12 | 15.1 | 22.1 | 30.7 |
| Black | 45 | 75 | 74.8 | 64.4 | 51.3 |
| Other | 22 | 14 | 10.1 | 13.5 | 18.0 |
| At least high school | 76 | 72 | 65.9 | 82.2 | 79.0 |
| Current smoker | 9 | 14 | 25.4 | 17.8 | 18.9 |
| BMI category | |||||
| <18.5 kg/m2 | 4 | 1 | 1.4 | 1.9 | 3.1 |
| 18.5–<25 kg/m2 | 25 | 33 | 33.8 | 37.5 | 41.4 |
| 25–<30 kg/m2 | 27 | 22 | 30.2 | 32.2 | 26.4 |
| ≥30 kg/m2 | 44 | 44 | 34.5 | 28.4 | 29.1 |
| ESRD vintage (y) | 4.9 (4.3) | 4.9 (5.5) | 4.2 (4.3) | 5.8 (5.6) | 4.7 (5.0) |
| Diabetes | 77 | 65 | 56.8 | 47.6 | 36.3 |
| COPD | 13 | 12 | 12.2 | 7.7 | 2.7 |
| Cancer | 10 | 6 | 9.4 | 6.3 | 8.4 |
| CHF | 45 | 42 | 24.5 | 27.9 | 22.6 |
| CAD/MI | 45 | 44 | 25.9 | 26.4 | 18.1 |
| CVA/TIA | 20 | 15 | 10.8 | 10.1 | 5.3 |
| PVD | 37 | 8 | 10.8 | 5.3 | 4.4 |
| Other cardiac diseases | 45 | 36 | 25.2 | 26.9 | 15.5 |
| KDQoL-CF score | 86.1 (18.9) | 86.0 (16.3) | 83.0 (19.1) | 90.0 (15.2) | 90.1 (14.7) |
| Hemoglobin (g/dL) | 11.3 (1.3) | 11.5 (1.3) | 11.6 (1.3) | 11.5 (1.4) | 11.6 (1.3) |
| Predialysis SBP (mm Hg) | 145 (23) | 151 (24) | 154 (22) | 155 (25) | 150 (21) |
| Fell in past 12 mo | 39 | 40 | 33.3 | 25.0 | 19.7 |
| Hospitalized in past 12 mo | 66 | 59 | 52.5 | 44.7 | 39.0 |
| ADL difficulty reported | 73 | 22 | 16.7 | 11.1 | 4.4 |
| SF-36 PF score | 16.4 (21.5) | 32.6 (23.3) | 47.2 (27.9) | 61.6 (24.7) | 74.5 (22.4) |
| Assistive walking device | 93 | 70 | 27.5 | 8.7 | 3.5 |
| Assistive device used for walk test | NA | 51 | 10.4 | 3.9 | 0.9 |
Note: N=752. Values for categorical variables are given as percentages; values for continuous variables, as mean ± standard deviation.
Abbreviations and definitions, BMI: body mass index; CAD: coronary artery disease; CHF: congestive heart failure; COPD: chronic obstructive pulmonary disease; CVA: cerebrovascular accident; ESRD: end-stage renal disease; HD: hemodialysis; KDQoL-CF: Kidney Disease Quality of Life–Cognitive Function; MI: myocardial infarction; other cardiac disease: cardiac dysrhythmia, atrial fibrillation, tachycardia, pericarditis, cardiac arrest; other race: Native American, Asian, Native Hawaiian, other Pacific Islander, other; PVD: peripheral vascular disease; SBP: systolic blood pressure; SF-36 PF: 36-Item Short-Form Health Survey Physical Function; TIA: transient ischemic attack.