Table 17. Cross-validation of Measured vs. Predicted VO2peak, from submaximal 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 | 41.1 ± 7.3 | 39.5 ± 5.1 | 1.68 | 13.1 | 14.0 | 187 (27.4) | 40.8 ± 7.5 | 39.7 ± 5.5 | 1.16 | 12.8 | 13.3 | 184 (26.8) |
| 40-60 | 35.5 ± 6.7 | 36.3 ± 4.9 | -0.67 | 13.8 | 13.9 | 346 (50.6) | 35.8 ± 6.8 | 36.4 ± 4.8 | -0.48 | 14.3 | 14.4 | 371 (54.1) |
| >60 | 29.3 ± 5.7 | 30.7 ± 5.0 | -1.37 | 15.1 | 17.0 | 150 (22.0) | 29.7 ± 5.1 | 31.6 ± 5.0 | -1.82 | 13.8 | 15.8 | 131 (19.1) |
| VO2peak | ||||||||||||
| <30) | 26.3 ± 2.8 | 30.6 ± 4.9 | -4.23 | 9.5 | 23.7 | 164 (24.0) | 26.5 ± 2.7 | 31.1 ± 4.9 | -4.41 | 8.9 | 22.9 | 144 (21.0) |
| 30-40 | 34.9 ± 2.8 | 35.4 ± 4.2 | -0.43 | 7.3 | 11.5 | 320 (46.9) | 34.8 ± 2.9 | 35.5 ± 4.1 | -0.77 | 7.6 | 11.9 | 347 (50.6) |
| >40 | 45.6 ± 4.8 | 41.5 ± 4.0 | 4.08 | 8.9 | 12.9 | 199 (29.1) | 45.6 ± 4.7 | 41.6 ± 4.1 | 4.24 | 8.7 | 13.0 | 195 (28.4) |
| Velocity | ||||||||||||
| <5 | 30.8 ± 5.5 | 31.4 ± 4.4 | -0.56 | 15.3 | 16.0 | 273 (40.0) | 31.3 ± 5.7 | 31.7 ± 4.2 | -0.38 | 14.6 | 14.8 | 262 (38.2) |
| 5-6 | 38.3 ± 6.7 | 38.5 ± 4.2 | -0.16 | 13.6 | 13.8 | 386 (56.5) | 38.3 ± 7.0 | 38.7 ± 3.9 | -0.39 | 13.7 | 13.8 | 401 (58.4) |
| >6 | 47.1 ± 7.9 | 47.0 ± 4.1 | 0.19 | 13.5 | 14.2 | 24 (3.5) | 46.3 ± 7.4 | 48.5 ± 3.2 | -2.10 | 15.4 | 15.6 | 23 (3.4) |
| Total | 35.9 ± 7.8 | 36.0 ± 5.9 | -0.03 | 14.5 | 14.5 | 683 | 36.1 ± 7.7 | 36.3 ± 5.7 | -0.11 | 14.2 | 14.3 | 686 |
VO2peak were categorized into 3 groups from measured VO2peak; <35, 35–50, >50 (mL kg-1 min-1) and <30, 30–40, >40 (mL kg-1 min-1) were cutoff values for men and women, respectively; velocity: treadmill velocity (km h-1).