Table 2.
Comparison of general clinical characteristics and diaphragm ultrasound findings between the two groups
| Items | Failure group (n = 22) | Success group (n = 57) | Statistics | p | ||
|---|---|---|---|---|---|---|
| General clinical characteristics | ||||||
| Gender (male, n,%) | 19(86.3) | 40(70.2) | 2.200 | 0.138 | ||
| Age (years) | 68(56,78) | 68(54,77) | -0.103 | 0.918 | ||
| APACHE2 scores | 21(15,25) | 12(8,17) | -4.182 | < 0.001 | ||
| Oxygenation index(mmHg) | 239.535 ± 94.084 | 305.508 ± 114.127 | 2.411 | 0.018 | ||
| SaO2(%) | 97 ± 3.232 | 98.08 ± 2.52 | 1.522 | 0.132 | ||
| Pplat (cmH2O) | 23.890 ± 1.197 | 20.350 ± 0.971 | -13.093 | < 0.001 | ||
| Vt (ml) | 408.950 ± 19.118 | 456.170 ± 26.876 | 8.443 | < 0.001 | ||
| F (time/min) | 28(25,35) | 20(18.22) | -6.106 | < 0.001 | ||
| RSBI (bpm/L) | 71.429(64.103,85.366) | 44.315(40.523,48.837) | -6.350 | < 0.001 | ||
| Cst, rs (ml/cmH2O) | 23.408 ± 1.560 | 30.094 ± 2.403 | -6.176 | < 0.001 | ||
| IWI (ml/cmH2O/bpm/L) | 37.613 ± 11.423 | 57.415 ± 17.773 | 5.846 | < 0.001 | ||
| Ultrasound indicators | ||||||
| Dtei-1 | 0.348 ± 0.070 | 0.348 ± 0.069 | 3.236 | 0.002 | ||
| Dtei-2 | 0.346 ± 0.067 | 0.401 ± 0.070 | 3.439 | 0.002 | ||
| Dtee-1 | 0.274 ± 0.055 | 0.289 ± 0.047 | 1.135 | 0.308 | ||
| Dtee-2 | 0.277 ± 0.052 | 0.286 ± 0.045 | 0.766 | 0.446 | ||
| DTF-1 | 0.246 ± 0.026 | 0.385 ± 0.063 | 13.781 | < 0.001 | ||
| DTF-2 | 0.23 ± 0.035 | 0.395 ± 0.068 | 0.766 | < 0.001 | ||
| Average DTF | 0.287 ± 0.081 | 0.350 ± 0.078 | 3.200 | 0.002 | ||
APACHE2, acute physiology and chronic health evaluation 2; SaO2, arterial oxygen saturation; Pplat, read platform pressure; Vt, tidal volume; F, respiratory rate; RSBI, rapid shallow breathing index; Cst, static lung compliance; IWI, integrative weaning index; DTF, diaphragm thickening fraction; Dtei, diaphragm thicknesses; Dtee, diaphragmatic thicknesses