Fig. 4From: Interobserver variability of ventilatory anaerobic threshold in asymptomatic volunteersBland-Altman plots of ventilatory anaerobic threshold (expressed as VO2@AT) determined by trained medical assistants compared with (a) physician reader 1 or (b) physician reader 2. Upper and lower plots show percentage difference and difference in mL/min, respectively. SD = standard deviation; VO2@AT = oxygen uptake at the anaerobic thresholdBack to article page