表 2.
病例的人口学及基线资料
Demographic and baseline characteristics
| Items | LMA group (n=68) | ETT group (n=100) | P value |
| LMA, laryngeal mask airway; ETT, endotracheal tube; CXR, chest X-ray, normal CXR indicated clears and normal pulmonary images, while abnormal CXR included fibrotic changes, such as increased linear strands or reticular opacities; ASA, American Society of Anesthesiologists. | |||
| Gestational age at birth/weeks, M(Q1, Q3) | 30 (28, 32) | 30 (29, 31) | 0.756 |
| Postconceptual age/weeks, M(Q1, Q3) | 45 (42, 47) | 45 (42, 50) | 0.258 |
| Body weight at birth/kg, M(Q1, Q3) | 1.3 (1.2, 1.6) | 1.4 (1.2 1.6) | 0.445 |
| Body weight at surgery/kg, M(Q1, Q3) | 4.0 (3.2, 5.0) | 4.5 (3.0, 5.9) | 0.568 |
| Male, n(%) | 45 (66.2) | 75 (75.0) | 0.214 |
| ASA Ⅲ, n(%) | 68 (100) | 100 (100) | 1.000 |
| Results of CXR, n(%) | 0.214 | ||
| Normal | 45 (66.2) | 75 (75.0) | |
| Abnormal | 23 (33.8) | 25 (25.0) | |
| Hemoglobin level/(g/L), M(Q1, Q3) | 106 (91, 114) | 108 (96, 11) | 0.424 |
| Duration of surgery/min, M(Q1, Q3) | 60 (42, 97) | 62 (45, 85) | 0.891 |