Table 4 Comparison of people whose absolute value of (measured V̇O2peak-predicted V̇O2peak)/measured V̇O2peak is > 20% in different prediction equations.

From: A reference equation for peak oxygen uptake for cycle ergometry in Chinese adult participants

Variables

PUTH equation

Xiangya equation

Wasserman equation

FRIEND equation

p value

Total (N = 4624)

1526 (33.0)

1827 (39.5)*

2909 (62.9)*

3762 (81.4)*

 < 0.001

Sex groups

 Men (N = 2244)

816 (36.4)

1006 (44.8)*

1583 (70.5)*

1986 (88.5)*

 < 0.001

 Women (N = 2380)

710 (29.8)

821 (34.5)*

1326 (55.7)*

1776 (74.6)*

 < 0.001

Age groups (yrs)

 18–29 (N = 675)

232 (34.4)

282 (41.8)*

536 (79.4)*

629 (93.2)*

 < 0.001

 30–39 (N = 940)

306 (32.6)

378 (40.2)*

676 (71.9)*

839 (89.3)*

 < 0.001

 40–49 (N = 1081)

365 (33.8)

446 (41.3)*

662 (61.2)*

870 (80.5)*

 < 0.001

 50–59 (N = 1004)

346 (34.5)

418 (41.6)*

561 (55.9)*

757 (75.4)*

 < 0.001

 60–69 (N = 677)

194 (28.7)

224 (33.1)

347 (51.3)*

508 (75.0)*

 < 0.001

 70–79 (N = 230)

77 (33.5)

75 (32.6)

120 (52.2)*

146 (63.5)*

 < 0.001

 80–89 (N = 17)

6 (35.3)

4 (23.5)

7 (41.2)

13 (76.5)

0.013

BMI categories (kg·m−2)

  < 18.5 (N = 142)

55 (38.7)

55 (38.7)

118 (83.1)*

126 (88.7)*

 < 0.001

 18.5–23.9 (N = 2063)

718 (34.8)

861 (41.7)*

1327 (64.3)*

1695 (82.2)*

 < 0.001

 24–27.9 (N = 1675)

530 (31.6)

686 (41.0)*

1002 (59.8)*

1360 (81.2)*

 < 0.001

  ≥ 28 (N = 744)

223 (30.0)

225 (30.2)

462 (62.1)*

581 (78.1)*

 < 0.001

  1. Data are presented as n (%).
  2. BMI body mass index, FRIEND fitness and the importance of exercise: a national data base, PUTH Peking University Third Hospital, RER respiratory exchange rate, V̇O2peak peak oxygen uptake.
  3. *Significantly different vs. PUTH equation (p < 0.05).
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