Table 4.

Hemidiaphragmatic excursion during the sigh test

Vables	Group I	Group II	P-value
Incidence of hemidiaphragmatic paresis, n (%)	0 (0)	23 (92)	< 0.0001b
Diaphragmatic excursions
M-mode sigh: baseline, cm	5.9 ± 1.2	6.2 ± 1.1	0.435
M-mode sigh: 30 min, cm	5.6 ± 1.2	2.3 ± 0.9	< 0.0001a
Decrease in diaphragmatic excursion, (%)	5.2 ± 4.3	61.7 ± 17.9	< 0.0001a

Data are expressed as the mean ± standard deviation

^aCompared using the Student t-test

^bCompared using the Chi-squared test