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Baseline Characteristics of Trials Included in the Meta-Analysis
| Pulmonary Surfactant | Usual Therapy | |
|---|---|---|
| Variables | (n = 1,285) | (n = 1,289) |
| Mean age (y) | 51.6 | 51.1 |
| Men/total | 812/1,277 | 819/1,281 |
| Mean basic PaO2:FIO2 ratio | 128.9 (n = 1,285) | 121.6 (n = 1,289) |
| Mean APACHE score | 23.25 (n = 1,269) | 23.35 (n = 1,273) |
Abbreviations: APACHE, Acute Physiology and Chronic Health Evaluation; PaO2:FIO2, ratio of partial pressure of arterial oxygen to fraction of inspired oxygen.
