Table 4

Correlation coefficients between selected variables in patients with asthma

	Trait	State	BDI	Eos	logPC₂₀	RV	PEF	FEV₁	Paco₂	Petco₂	Vt/Ti	V˙	f
Vt	−0.06	0.34	−0.19	0.33	−0.21	0.22	−0.06	−0.10	−0.19	0.10	0.44^4-151	0.37	0.56^*
f	−0.31	−0.31	−0.24	−0.13	0.13	0.03	0.20	0.19	0.17	−0.22	0.25	0.50
V˙	0.25	0.10	0.04	0.20	−0.02	0.13	0.12	0.09	−0.01	−0.08	0.85^*
Vt/Ti	0.24	0.06	−0.12	0.04	0.00	0.28	−0.12	−0.10	−0.07	0.06
Petco ₂	−0.10	0.09	0.07	−0.20	0.49^4-151	0.28	−0.07	0.11	0.70
Paco ₂	−0.12	−0.18	0.16	−0.09	0.56^*	0.11	0.05	0.20
FEV₁	0.15	0.14	−0.28	−0.15	0.23	0.05	0.75^*
PEF	0.31	0.10	−0.29	−0.03	0.15	−0.13
RV	0.03	0.06	−0.15	0.27	0.09
logPC₂₀	0.09	−0.06	−0.07	−0.16
Eos	−0.22	−0.15	−0.01
BDI	0.65^*	0.59^*
State	0.70^*

Vt/Ti = mean inspiratory flow; eos = eosinophils; see footnote to table 2 for definition of other abbreviations.
Significant coefficients (^*p<0.01) shown in bold.
↵4-151 p<0.05.