Table 1.
Sample and linear regression characteristics for all subjects contrasted by study.
| Study | Sample Characteristics | Linear Regression Statistics | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Disease | n | peak VO2 Mean ± SD | 6 MWT Mean ± SD | Slope | Intercept | R | SEE | (SEE/Mean) × 100 | |
| Cahalin 1996 (3) | CHF | 45 | 12.4 ± 4.5 | 310 ± 103 | 0.028 | 3.583 | 0.65 | 3.44 | 27.7 |
| Cahalin 1995 (2) | ESLD | 60 | 9.6 ± 3.8 | 294 ± 139 | 0.019 | 4.042 | 0.69 | 2.81 | 29.2 |
| Lucas 1999 (6) | CHF | 307 | 14.2 ± 4.9 | 391 ± 105 | 0.027 | 3.666 | 0.59 | 3.99 | 28.1 |
| Miyamoto 2000 (7) | PH | 27 | 13.9 ± 4.4 | 377 ± 115 | 0.026 | 4.213 | 0.68 | 3.25 | 23.4 |
| Opasich 2001 (8) | CHF | 269 | 14.5 ± 4.9 | 378 ± 95 | 0.027 | 4.498 | 0.59 | 3.42 | 23.6 |
| Roul 1998 (9) | CHF | 114 | 16.8 ± 4.5 | 437 ± 108 | 0.009 | 12.910 | 0.21 | 4.43 | 26.4 |
| Starobin 2006 (10) | COPD | 49 | 14.0 ± 4.4 | 436 ± 89 | 0.027 | 2.184 | 0.55 | 3.69 | 26.4 |
| Zugck 2000 (11) | DC | 112 | 15.6 ± 5.2 | 463 ± 107 | 0.033 | 0.113 | 0.69 | 3.78 | 24.2 |
| Faggiano 1997 (4) | CHF | 26 | 15.1 ± 3.9 | 419 ± 121 | 0.019 | 7.260 | 0.58 | 3.25 | 20.8 |
| Lipkin 1986 (5) | CHF | 26 | 14.0 ± 4.1 | 452 ± 147 | 0.019 | 5.271 | 0.70 | 2.95 | 21.0 |
| Baylor | CPD | 48 | 13.1 ± 3.4 | 354 ± 131 | 0.017 | 6.921 | 0.68 | 2.50 | 19.1 |
| All Data | All | 1,083 | 14.3 ± 4.8 | 393 ± 115 | 0.025 | 4.682 | 0.59 | 3.82 | 26.7 |
ESLD - End Stage Lung Disease; DC - Dilated Cardiomyopathy; CHF - Congestive Heart Failure; PH -Pulmonary Hypertension; COPD - Chronic Obstructive Pulmonary Disease; CPD - Various Cardiopulmonary Disorders. Peak VO2 - peak oxygen uptake (ml/kg/min.); 6 MWD- distance walked (meters) during the 6-minute walk test.