Table 10. Cross-validation of Measured vs. Predicted VO2peak, from peak measurements, in women: The HUNT 3 fitness study.
| Validation sample | Cross-validation sample | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measured VO2peak | Predicted VO2peak | CE | %SEE | %TE | N (%) | Measured VO2peak | Predicted VO2peak | CE | %SEE | %TE | N (%) | |
| Age (yr.) | ||||||||||||
| <40 | 41.2 ± 7.4 | 41.5 ± 5.9 | -0.27 | 10.9 | 10.9 | 337 (28.1) | 40.7 ± 7.4 | 40.7 ± 6.1 | 0.03 | 10.1 | 10.1 | 327 (28.0) |
| 40-60 | 35.8 ± 6.8 | 35.6 ± 5.0 | 0.18 | 11.5 | 11.6 | 628 (52.4) | 35.5 ± 6.7 | 35.6 ± 5.4 | -0.16 | 11.2 | 12.2 | 621 (53.1) |
| >60 | 29.0 ± 5.4 | 29.2 ± 4.6 | -0.23 | 13.3 | 13.6 | 233 (19.5) | 29.9 ± 5.4 | 29.7 ± 4.2 | 0.23 | 13.2 | 13.3 | 222 (18.9) |
| VO2peak | ||||||||||||
| <30 | 26.2 ± 2.7 | 28.8 ± 4.1 | -2.60 | 8.8 | 16.8 | 279 (23.3) | 26.6 ± 2.8 | 29.2 ± 4.0 | -2.60 | 8.9 | 16.3 | 268 (22.9) |
| 30-40 | 34.9 ± 2.9 | 35.3 ± 4.0 | -0.44 | 7.1 | 10.1 | 575 (48.0) | 34.8 ± 2.9 | 35.2 ± 4.1 | -0.37 | 7.0 | 10.2 | 579 (49.5) |
| >40) | 45.7 ± 4.8 | 43.0 ± 4.9 | 2.73 | 8.2 | 10.9 | 344 (28.7) | 45.5 ± 4.7 | 42.8 ± 5.3 | 2.69 | 6.9 | 9.9 | 324 (27.6) |
| Velocity | ||||||||||||
| <7 | 29.2 ± 4.8 | 29.1 ± 3.6 | 0.07 | 12.6 | 12.8 | 392 (32.7) | 29.4 ± 4.6 | 29.2 ± 3.4 | 0.22 | 12.1 | 12.3 | 365 (31.2) |
| 7-10 | 38.2 ± 6.1 | 38.2 ± 3.9 | -0.02 | 11.4 | 11.4 | 725 (60.5) | 37.6 ± 5.7 | 37.8 ± 4.0 | -0.26 | 11.2 | 11.2 | 734 (62.6) |
| >10 | 49.1 ± 5.7 | 49.5 ± 3.0 | -0.38 | 9.7 | 9.7 | 81 (6.8) | 51.3 ± 4.8 | 50.3 ± 3.5 | 0.99 | 7.5 | 7.8 | 72 (6.2) |
| Total | 36.0 ± 7.9 | 36.0 ± 6.7 | -0.03 | 11.7 | 11.7 | 1198 | 35.9 ± 7.6 | 35.9 ± 6.6 | -0.04 | 11.2 | 11.2 | 1171 |
VO2peak were categorized into 3 groups from measured VO2peak; <30, 30–40, >40 (mL kg-1 min-1) were cutoff values for women; velocity: treadmill velocity (km h-1).