Table 3.
Univariate Ordinal Logistic Regression Model
| Covariate | OR | 95% CI | P Value |
|---|---|---|---|
| BMI, 1-unit change | 1.083 | 1.000-1.172 | .0488 |
| Tidal volume per kg IBW, 1-unit change, mL | 1.131 | 0.803-1.594 | .4799 |
| Fio2, 1-unit change | 1.053 | 0.982-1.130 | .1482 |
| PEEP, 1-unit change, cm H2O | 0.920 | 0.693-1.223 | .5664 |
| Time to atelectasis survey, 1-unit change, min | 1.049 | 1.015-1.084 | .0043 |
| BMI group | |||
| < 25 | 1.000 | … | … |
| ≥ 25 | 4.167 | 1.467-11.837 | .0074 |
| Tidal volume group | |||
| < 400 mL | 1.000 | … | … |
| ≥ 400 mL | 1.642 | 0.597-4.517 | .3369 |
| Tidal volume per kg IBW | |||
| < 8.77 mL/kg | 1.000 | … | … |
| ≥ 8.77 mL/kg | 0.914 | 0.343-2.435 | .8569 |
| Fio2 group | |||
| < 100% | 1.000 | … | … |
| 100% | 1.716 | 0.585-5.033 | .3252 |
| PEEP group, cm H2O | |||
| 0 | 1.000 | … | … |
| ≥ 1 | 1.251 | 0.467-3.354 | .6565 |
| Time to atelectasis survey group | |||
| < 33 min | 1.00 | … | … |
| ≥ 33 min | 3.255 | 1.145-9.256 | .0269 |
IBW = ideal body weight. See Table 1 legend for expansion of other abbreviation.