Fig. 3From: Relationships between trait and respiratory parameters during quiet breathing in normal subjectsThe relationships between tidal volume (V T), respiratory rate (RR) and trait anxiety. a Linear plot of V T and trait scores. A significant negative correlation was observed (ρ = −0.687, p < 0.01). b Comparison of V T in HT and in LT. V T in LT was significantly larger than in HT (*p < 0.05). c Linear plot of RR and trait scores. A significant positive correlation was observed in RR (ρ = 0.749, p < 0.05). d Comparison of RR in HT and in LT. RR in HT was significantly higher than in LT (**p < 0.01). Median V T and RR in HT and LT were indicated with horizontal bars. The vertical bars indicate the range and the horizontal boundaries of the boxes represent the first and third quartilesBack to article page