TABLE 4.
Mean Reference Values for CRF With Measured V̇O2max Obtained From Treadmill CPX Tests From FRIEND Compared With Previously Published Valuesa,b
| Sex | Age group (y)
|
|||||
|---|---|---|---|---|---|---|
| 20–29 | 30–39 | 40–49 | 50–59 | 60–69 | 70–79 | |
| Male | ||||||
| FRIEND | 47.6±11.3 (n=513) | 43.0±9.9 (n=963) | 38.8±9.6 (n=1327) | 33.8±9.1 (n=1078) | 29.4±7.9 (n=593) | 25.8±7.1 (n=137) |
| Loe et al19 | 54.4±8.4 (n=199) | 49.1±7.5 (n=324) | 47.2±7.7 (n=536) | 42.6±7.4 (n=466) | 39.2±6.7 (n=300) | 35.3±6.5 (n=76) |
| Evardsen et al18 | 48.9±9.6 (n=38) | 46.2±8.5 (n=73) | 42.7±9.3 (n=91) | 36.8±6.6 (n=88) | 32.4±6.4 (n=81) | 30.1±4.8 (n=23) |
|
| ||||||
| Female | ||||||
| FRIEND | 37.6±10.2 (n=410) | 30.9±8.0 (n=608) | 27.9±7.7 (n=843) | 24.2±6.1 (n=805) | 20.7±5.0 (n=408) | 18.3±3.6 (n=98) |
| Loe et al19 | 43.0±7.7 (n=215) | 40.0±6.8 (n=359) | 38.4±6.9 (n=493) | 34.4±5.7 (n=428) | 31.1±5.1 (n=240) | 28.3±5.2 (n=53) |
| Evardsen et al18 | 40.3±7.1 (n=37) | 37.6±7.5 (n=63) | 33.0±6.4 (n=86) | 30.4±5.1 (n=79) | 28.7±6.6 (n=59) | 23.5±4.1 (n=41) |
a
CRF = cardiorespiratory fitness; CPX = cardiopulmonary exercise testing; FRIEND = Fitness Registry and the Importance of Exercise National Database; V̇O2max = maximal oxygen uptake.
b
Data are expressed as means ± SD with sample sizes for each age range. All patients were considered free of known cardiovascular disease.