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Comparison of RAS between groups
| Preoperative RAS | D1 RAS | |
|---|---|---|
| Low VT-PEEP (n = 24) | 0 (0–1) | 1 (1–2) |
| High VT-ZEEP (n = 20) | 0.5 (0–1) | 3 (2–3) |
| p | 0.989 | <0.001 |
Values are presented as medians (range) unless otherwise stated. RAS, radiological atelectasis score; D1, day 1; VT, tidal volume; PEEP, positive end-expiratory pressure; ZEEP, zero end-expiratory pressure.
