| Group | Tbaseline | TALI | T6 h | T18 h | T24 h |
---|
PaO2/FiO2 (torr) | PCV | 592 (572–603) | 70 (59–71)a | 62 (50–217)a | 120 (69–315)a | 208 (78–340)a |
 | PCV+R | 554 (519–569)b | 56 (52–63)a | 260 (245–278)a-c | 240 (227–265)a,c | 250 (244–269)a,c |
PaCO2 (torr) | PCV | 39 (35–46) | 49 (41–58)a | 62 (56–68)a,c | 61 (50–64)a,c | 64 (57–67)a,c |
 | PCV+R | 39 (37–42) | 55 (50–71)a | 54 (40–64)a | 47 (44–62)a | 48 (45–54)a,b |
- Data are presented as the median (interquartile range). aFriedman repeated measures analysis of variance on ranks with all pairwise multiple comparison procedures (Student-Newman-Keuls method): versus Tbaseline (p < 0.05). bMann-Whitney rank sum test: p < 0.05 versus PCV. cFriedman repeated measures analysis of variance on ranks with all pairwise multiple comparison procedures (Student-Newman-Keuls method): versus TALI (p < 0.05). FiO2, inspiratory fraction of oxygen; PaCO2, arterial carbon dioxide tension; PaO2, arterial oxygen tension; PCV, pressure-controlled ventilation; PCV+R, pressure-controlled ventilation with recruitment manoeuvre; T6 h, time point 6 hours after randomisation; T18 h, time point 18 hours after randomisation; T24 h, time point 24 hours after randomisation; TALI, time point after lung injury; Tbaseline, baseline time point.