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Journal of Patient-Reported Outcomes

Table 2 CPET and questionnaire results

From: Monitoring aerobic capacity in cancer survivors using self-reported questionnaires: criterion validity and responsiveness

Variable

Subjects who completed CPET and questionnaires at T0

(n = 70)a

Subjects who completed CPET and questionnaires at T0 and T1

(n = 58)b

Anthropometric data

 

T 0

T 1

ΔT 0 en T 1

Body weight (kg)

77.4 (± 15.5)

76.5 (± 15.2)

77.4 (± 15.7)

0.9 (0.2‒1.7)*

CPET data

    

CPET-VO2peak (mL·kg− 1·min− 1)

18.9 (± 5.9)

18.5 (± 5.4)

20.1 (± 5.9)

1.6 (1.0‒2.3)*

% of the reference VO2peakc

62 (± 19)

62 (± 18)

67 (± 19)

6 (4‒7)

HRpeak (beat·min− 1)

147 (± 22)

147 (± 21)

148 (± 20)

1 (-3‒5)

RERpeak (VCO2/VO2)

1.16 (± 0.09)

1.15 (± 0.09)

1.16 (± 0.09)

0.01 (-0.01‒0.03)

VO2AT (mL·kg− 1·min− 1)

11.6 (± 3.2)

11.4 (± 2.9)

12.8 (± 3.1)

1.3 (0.7‒1.9)*

Δ Time CPET T0-T1 (days)

-

-

-

94 (89‒98)*

Questionnaire data

    

FitMáx-VO2peak (mL·kg− 1·min− 1)

23.2 (± 7.7)

22.7 (± 6.1)

24.7 (± 6.6)

1.9 (0.6‒3.3)*

FitMáx-VO2peak without cycling (mL·kg− 1·min− 1)

23.8 (± 7.5)

23.5 (± 6.6)

25.3 (± 6.9)

1.8 (0.5‒3.2)*

VSAQ-VO2peak (mL·kg− 1·min− 1)

19.4 (± 7.4)

18.0 (± 6.1)

21.3 (± 8.4)

3.2 (1.4‒5.1)*

DASI-VO2peak (mL·kg− 1·min− 1)

22.9 (± 6.0)

22.2 (± 6.1)

25.3 (± 5.4)

3.1 (1.4‒4.8)*

Ability to estimate FitMáx scores (1–10)

    

Walking score estimate

8 (7‒9)

8 (7‒9)

8 (7‒10)

 

Stairclimbing score estimate

8 (6‒9)

8 (6‒8)

8 (7‒9)

 

Cycling score estimate

5 (3‒8)

5 (3‒7)

6 (4‒8)

 
  1. Means ± SDs are presented for subjects who completed the CPET and questionnaires at T0
  2. The ability to estimate the maximum capacity of walking, stairclimbing and cycling (1–10) is reported as median (interquartile range)
  3. For subjects who completed CPET and questionnaires at T0 and T1, means ± SDs are presented for both time points with the mean difference and corresponding 95%-CI. * Statistically significant
  4. Abbreviations: CPET, cardiopulmonary exercise test; DASI, duke activity status index; HRpeak, heartrate at peak exercise; kg, kilograms; mL, milliliters; min, minute; n, number of subjects; RERpeak, peak respiratory exchange ratio; VO2AT, oxygen uptake at the anaerobic threshold; VO2peak, peak oxygen uptake; VSAQ, veterans specific activity questionnaire
  5. a Missing values for subjects who performed CPET and filled in questionnaires at T 0 (n = 70): VO 2AT n = 1,, FitMáx n = 5, FitMáx without cycling n = 1, DASI n = 9, walking score estimate n = 2, stairclimbing score estimate n = 2, cycling score estimate n = 3
  6. b Missing values for subjects who completed CPET and questionnaires at T 0 and T 1 (n = 58): VO 2AT n = 1,, FitMáx n = 7, FitMáx without cycling n = 2, DASI n = 13, walking score estimate n = 1, stairclimbing score estimate n = 1, cycling score estimate n = 1
  7. cMean VO2peakcalculated by prediction model for VO2peakof the LowLands Fitness Registry for the general Dutch population was 31.0 ± 5.8 mL·kg− 1·min− 1for this population at T0.[36]
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