Table 3.
Cross validation of the EB-testnew equation (in the external cross-validation group)
| Measured VO2max (L min−1) | Estimated VO2max (L min−1) | Difference measured vs estimated VO2max (L min−1) | Coefficient of variation (%) | R 2 adjusted | SEE (L min−1) | |
|---|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | Mean (95 % CI) | ||||
| All (n = 115) | 3.37 (0.97) | 3.39 (1.02) | 0.02 (−0.04 to 0.08) | 9.4 | 0.90 | 0.30 |
| Men (n = 60) | 3.95 (0.89) | 4.06 (0.89) | 0.11 (0.02 to 0.20) | 8.3 | 0.86 | 0.33 |
| Women (n = 55) | 2.75 (0.59) | 2.66 (0.54) | −0.09 (−0.16 to −0.01) | 10.0 | 0.79 | 0.27 |
| Age | ||||||
| <35 (n = 55) | 3.75 (0.77) | 3.77 (0.90) | 0.01 (−0.08 to 0.11) | 9.1 | 0.86 | 0.29 |
| 35–49 (n = 28) | 3.53 (1.07) | 3.49 (1.07) | −0.04 (−0.15 to 0.08) | 8.5 | 0.92 | 0.30 |
| 50–64 (n = 15) | 2.87 (0.81) | 2.95 (0.89) | 0.08 (−0.11 to 0.27) | 11.8 | 0.84 | 0.33 |
| ≥65 (n = 17) | 2.34 (0.49) | 2.39 (0.56) | 0.06 (−0.07 to 0.19) | 10.9 | 0.77 | 0.23 |
| Absolute VO2max level (according to L min−1) | ||||||
| Q1 (n = 24) | 2.28 (0.47) | 2.44 (0.59) | 0.16 (0.03 to 0.29) | 12.8 | 0.73 | 0.24 |
| Q2 (n = 21) | 2.96 (0.51) | 3.02 (0.71) | 0.06 (−0.07 to 0.18) | 9.3 | 0.90 | 0.16 |
| Q3 (n = 23) | 3.41 (0.67) | 3.38 (0.80) | −0.03 (−0.14 to 0.09) | 8.0 | 0.89 | 0.22 |
| Q4 (n = 47) | 4.10 (0.81) | 4.05 (0.96) | −0.05 (−0.15 to 0.05) | 8.5 | 0.88 | 0.29 |
| Relative VO2max level (according to mL kg−1 min−1) | ||||||
| Q1 (n = 23) | 2.58 (0.70) | 2.68 (0.66) | 0.10 (−0.01 to 0.21) | 9.3 | 0.87 | 0.25 |
| Q2 (n = 19) | 3.00 (0.82) | 3.02 (0.91) | 0.03 (−0.10 to 0.15) | 8.8 | 0.91 | 0.24 |
| Q3 (n = 31) | 3.32 (0.80) | 3.36 (0.93) | 0.04 (−0.10 to 0.19) | 11.9 | 0.82 | 0.34 |
| Q4 (n = 42) | 4.02 (0.86) | 3.97 (0.99) | −0.05 (−0.15 to 0.04) | 7.7 | 0.91 | 0.26 |
All measured and estimated values are in expressed as L min−1
Quartiles (L min−1), women; <2.14, 2.14–2.59, 2.59–2.93, >2.93; men; <3.07, 3.07–3.75, 3.75–4.33, >4.33
Quartiles (mL kg−1 min−1), women; <32.5, 32.5–40.2, 40.2–47.4, >47.4; men; <37.5, 37.5–47.6, 47.6–54.8, >54.8
SD standard deviation, SEE standard error of the estimate, Q quartile