Table 3.
Associations of Baseline Leg Strength Measures with Clinical Characteristics among Men with Peripheral Arterial Disease (n=246)
| Knee Extension | |||||
|---|---|---|---|---|---|
| 1st Quartile (5.50 – 37.65 Newton-Meters) (N=91) | 2nd Quartile (38.65 – 50.95 Newton-Meters) (N=57) | 3rd Quartile (51.30 – 66.30 Newton-Meters) (N=57) | 4th Quartile (66.70 – 120.55 Newton-Meters) (N=57) | Trend P-value | |
| Age (years) | 73.4 (8.6) | 72.5( 7.7) | 71.8(8.4) | 67.0( 7.9) | <.001 |
| Ankle brachial index | 0.63 (0.16) | 0.67 (0.14) | 0.64 (0.12) | 0.68 (0.13) | .176 |
| Body mass index (kg/M2) | 26.0 (5.4) | 26.8 (4.2) | 26.7 (3.9) | 27.8 (4.2) | .212 |
| African American (%) | 12.5 | 14.0 | 15.8 | 8.8 | .713 |
| Diabetes mellitus (%) | 39.3 | 22.8 | 36.8 | 40.4 | .173 |
| Angina pectoris (%) | 60.7 | 47.4 | 38.6 | 35.1 | .031 |
| Myocardial infarction (%) | 46.4 | 38.6 | 22.8 | 26.3 | .028 |
| Heart failure (%) | 53.6 | 29.8 | 14.0 | 17.5 | <.001 |
| Pulmonary disease (%) | 35.7 | 28.1 | 24.6 | 35.1 | .500 |
| Cancer (%) | 19.6 | 12.3 | 15.8 | 14.0 | .732 |
| Current cigarette smoker (%) | 17.9 | 21.1 | 19.3 | 29.8 | .413 |
| Number of city blocks walked in the past week | 33.5 (44.1) | 26.4 (28.9) | 50.2(81.2) | 46.3 (78.9) | .149 |
| Six minute walk distance (feet) | 1106 (341) | 1186 (394) | 1277 (364) | 1330 (328) | .005 |
| Knee Flexion | |||||
|---|---|---|---|---|---|
| 1st Quartile (3.65 – 24.25) (N=56) | 2nd Quartile (24.45 – 35.75) (N=57) | 3rd Quartile (35.80 – 46.60) (N=57) | 4th Quartile (46.65 – 96.65) (N=57) | P-value | |
| Age (years) | 73.4 (8.8) | 73.2 (8.1) | 71.7 (8.0) | 66.4 (7.3) | <.0001 |
| Ankle brachial index | 0.61 (0.15) | 0.67 (0.14) | 0.68 (0.12) | 0.66 (0.13) | .043 |
| Body mass index (kg/M2) | 25.9 (4.2) | 26.9 (5.1) | 26.7 (4.2) | 27.8 (4.2) | .141 |
| African American (%) | 21.4 | 12.3 | 7.0 | 10.5 | .126 |
| Diabetes mellitus (%) | 26.8 | 40.4 | 38.6 | 33.3 | .428 |
| Angina pectoris (%) | 46.4 | 43.9 | 52.6 | 38.6 | .504 |
| Myocardial infarction (%) | 32.1 | 36.8 | 38.6 | 26.3 | .509 |
| Heart failure (%) | 32.1 | 36.8 | 24.6 | 21.1 | .233 |
| Pulmonary disease (%) | 30.4 | 35.1 | 24.6 | 33.3 | .635 |
| Cancer (%) | 14.3 | 19.3 | 14.0 | 14.0 | .830 |
| Current cigarette smoker (%) | 19.6 | 24.6 | 21.1 | 22.8 | .930 |
| Number of city blocks walked in the past week. | 27.6 (33.5) | 36.7 (64.6) | 35.8 (44.0) | 56.1 (91.0) | .096 |
| Six minute distance (feet) | 1118 (369) | 1206 (386) | 1233 (335) | 1343 (343) | .011 |