One-year resource utilisation, costs and quality of life in patients with acute respiratory distress syndrome (ARDS): secondary analysis of a randomised controlled trial

Table 1 Baseline patient characteristics

Characteristic	All patients (N = 795)	1-year survivors (N = 388)	1-year non-survivors (N = 407)	P value
Age—years [SD]	55.4 [16.8]	50.2 [15.6]	60.4 [16.4]	<0.001
Female—no. (%)	300 (37.7)	148 (38.1)	152 (37.4)	0.8168
APACHE II score [SD]^a	21.8 [6.1]	20.3 [5.7]	23.2 [6.0]	<0.001
PaO2:FiO2 ratio—KPa [SD]	15.1 [5.0]	16.0 [5.2]	14.2 [4.6]	<0.001
Prime condition: Pneumonia/pneumonitis—no. (%)	466 (58.6)	220 (56.7)	246 (60.4)	0.2849
Surgery admission—no. (%)	108 (13.6)	64 (16.5)	44 (10.8)	0.0194
ICU length of stay—days [SD]	17.0 [16.5]	19.7 [15.5]	14.4 [16.9]	<0.001
Hospital length of stay—days [SD]^b	33.6 [43.1]	47.2 [48.6]	20.9 [32.3]	<0.001

APACHE Acute Physiology and Chronic Health Evaluation, FiO2 fraction of inspired oxygen and PaO2 partial pressure of arterial oxygen
^aAPACHE II score calculated for 765 patients only
^bFive patients with missing information on hospital discharge