Table 1. Characteristics of 59 participating ICUs.

Characteristics	59 ICUsa
Center of the German ARDS Network, N (%)	38 (64.4)
ICU’s of University hospitals, N (%)	30 (50.8)
Maximum level of careb, N (%)	35 (59.3)
Duration of recruitment (weeks), Md [IQR]	55 [42–61]

^a, with at least one patient included in this paper; ^b, maximum level of care refers to hospitals with highly differentiated medical-technical equipment. ICU, intensive care unit; ARDS, acute respiratory distress syndrome; Md, median; IQR, interquartile range.