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. 2020 Jun 17;158(6):2658–2666. doi: 10.1016/j.chest.2020.05.565

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.