Table 1

XINT Variables

Variable

Description

Variable

Description


Demographic Information


firstName

Patient's first name

lastName

Patient's last name

patId

Patient's identification number

tDate

Date of test

age *

Age in years

sex *

Male or female

height *

Height in inches

weight *

Weight in pounds

baroPr

Barometric pressure (mmHg)

exTimeMin

Exercise time (minutes)

exTimeSec

Exercise time (seconds)

termReason

Reason for terminating the CPET

TermBy (Tt)

Test terminated by the observer

doc

Doctor's name

lowHrResp

Heart rate response low? (y/n)

pcntBf

Body mass index (BMI)


Spirometry Variables


preFev1 *

FEV1 before exercise

preFvc *

FVC before exercise

preFev1Fvc

FEV1/FVC before exercise

preMvv

Maximum voluntary ventilation before exercise (MVV)


Physiological Variables


maxVo2Kg *

Maximum (or peak) oxygen uptake (ml/kg/min)

maxVo2M1 *

Maximum (or peak) oxygen uptake (ml/min)

maxPMph

Maximum treadmill speed (mph)

maxPE1ev

Elevation of treadmill (%)

maxR *

Respiratory exchange ratio (R) at maximum exercise

atKg

Anaerobic threshold (AT) (ml/kg/min)

atM1

Anaerobic threshold (AT) (ml/min)

maxP

Maximum power output (watts)

wattsVo2

Slope of VO2 (ml)/power(watts)

maxHr *

Maximum heart rate obtained during CPET

hrVo2

Slope of heart rate/VO2(L) mid-exercise

restHr

Resting heart rate

restSBp

Resting systolic blood pressure

restDBp

Resting diastolic blood pressure

exSBp

Maximum exercise systolic blood pressure

exDBp

Maximum exercise diastolic blood pressure

midVeVo2 *

VE/VO2 at mid exercise

maxVeVo2

VE/VO2 at maximum exercise

midVeVCo2

VE/VCO2 at mid exercise

maxVeVCo2

VE/VCO2 at maximum exercise

maxTv *

Tidal volume at maximum exercise

restVe

Ventilation (VE) at rest

maxVe *

Ventilation at maximum exercise

breatheRsrv

Breathing reserve

rraPac02

Arterial PCO2 before exercise

rraPa02

Arterial PO2 before exercise

rraHco3

Bicarbonate (HCO3) before exercise

rraO2Sat

02 saturation before exercise

exPaCo2

Arterial PCO2 at maximum exercise

exPa02

Arterial PO2 at maximum exercise

exHco3

Bicarbonate (HCO3) at maximum exercise

ex02Sat

O2 saturation at maximum exercise

maxAa

(A-a) O2 difference at maximum exercise

maxVdVt

VD/VT at maximum exercise


Note: In the source code, variables prefixed with a "p" indicate predicted values and variables prefixed with "pp" indicate percent of predicted values. * indicates required variables. Others are optional and will be interpreted if entered.

Ross and Corry BMC Pulmonary Medicine 2007 7:15   doi:10.1186/1471-2466-7-15

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