Individual Changes in Respiratory Compliance Upon Immersion May Predict Susceptibility to Immersion Pulmonary Edema

Sports Medicine - Open

Table 2 Changes to spirometric data (VC, Vt, ERV, and IRV), and Crs induced by head-out-of-water immersion, and number of ULCs measured at the end of fin swimming exercise for the whole study population

	∆VC (L)	∆ERV (L)	∆IRV (L)	∆Vt (L)	∆Crs (L/kPa)	ULC
Median	− 0.44	− 1.13	0.49	0.20	0.93	16.5
25%/75% percentile	− 0.50/− 0.41	− 1.52 /− 0.8	0.14 /0.87	0.16 /0.22	0.70 / 1.36	7.2 / 24.2
Mean	− 0.45	− 1.19	0.54	0.20	1.01	15.9
S.D	0.06	0.46	0.45	0.03	0.46	11.3
Variation	↘9%	↘77%	↗40%	↗18%	↘85%	–
Statistical significance	p < 0.0001	p < 0.0001	p = 0.0002	p < 0.0001	p < 0.0001	–

Changes to spirometric data (VC, Vt, ERV, and IRV), and Crs induced by head-out-of-water immersion, and number of ULCs measured at the end of fin swimming exercise for the whole study population. Individual subject values are available in Additional file 1. Median values are shown, along with 25% /75% percentile, mean and standard deviation. Data variation is also expressed as a percentage (%). Statistical significance was determined using the Student’s t test for paired data when data were normally distributed, or Wilcoxon’s paired signed rank test for non-normally distributed data
Vital capacity (VC); expiratory reserve volume (ERV); inspiratory reserve volume (IRV); tidal volume (Vt); ultrasound lung comets (ULC)