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Table 2 Univariate analyses assessing the factors associated with resting capillary blood volume and slope of DL CO /work relationship

From: Ageing and endurance training effects on quantity and quality of pulmonary vascular bed in healthy men

  Resting capillary blood volume, mL Slope of DLCO/work relationship, mmol/min/kPa/% peak work rate
Linear regression, pearson r value P value r value P value
Age, years -0.545 <0.001 -0.258 0.041
Height, cm 0.537 <0.001 0.324 0.009
Peak V ˙ O 2 , mL/kg/min 0.390# 0.002 0.244 0.045
Sport practice, hours/week* 0.360 0.006 0.278 0.034
Vigorous-IPAQ, MET-min/week 0.356 0.004 0.264 0.036
Total-IPAQ, MET-min/week 0.116 0.364 0.218 0.086
  1. *sports were rowing (=19) triathlon (n = 6) and miscellaneous (n = 7) for the 32 endurance-trained men. The Vigorous-IPAQ domain was clearly related to sport practice duration (r2 = 0.64; p < 0.0001).
  2. #: the Pearson coefficient increased to 0.53 after excluding the two outliers using the Tietjen and Moore method (that is consistent with the r value of 0.60 for the same relationship in the study of Lalande et al. [4]).