Table 5. Gamma log link models for time to liberation outcome.
| Variable | Weaning days (mean ± SD) |
unadjusted analysis ¶ | p-value | Adjusted—Model 1 * | p-value | Adjusted—Model 2 ** | p-value |
|---|---|---|---|---|---|---|---|
| Study group | |||||||
| T-piece | 8.36 ± 11.04 | 2.06 (1.29–3.27) | 0.002† | 1.96 (1.18–3.24) | 0.009‡ | 1.92 (1.21–3.03) | 0.005‡ |
| PSV | 4.06 ± 4.94 | 1.00 | 1.00 | 1.00 | |||
| Sex | |||||||
| Male | 7.58 ± 10.53 | 1.71 (1.05–2.79) | 0.031† | 1.70 (0.99–2.89) | 0.051‡ | 1.42 (0.85–2.35) | 0.176‡ |
| Female | 4.42 ± 5.18 | 1.00 | 1.00 | 1.00 |
PSV, Pressure-Support Ventilation.
* Model 1 refers to adjustment for the following variables: age, simplified acute physiology score, hypercapnic exacerbation, 24-hour pre-SBT fluid balance and pre-SBT duration.
** Model 2 refers to Model 1 plus tracheostomy and ICU death.
¶ Data are presented as mean ratios (95% CIs).
† Likelihood ratio chi-square test.
‡ Wald test.