Table 1.

Characteristics of H1N1-infected patients with and without AKI

Characteristic	With AKI (n = 25)	Without AKI (n = 22)	P
Age (years), mean ± SD	44 ± 17	42 ± 12	0.59
Gender, male/female	12/13	10/12	1.00
Oseltamivir ≥48 hours after symptom onset, yes/no	20/5	18/4	1.00
Days from hospitalization to ICU admission, median (range)	1 (0.5 to 2.5)	1 (0 to 2)	0.33
Comorbidities
previous renal dysfunction, yes/no	2/23	3/19	0.65
chronic respiratory disease, yes/no	6/19	5/17	1.00
immunosuppression, yes/no	4/21	8/14	0.18
hypertension, yes/no	5/20	1/21	0.19
diabetes, yes/no	4/21	1/21	0.35
obesity,c yes/no	5/20	4/18	1.00
pregnancy, yes/no	2/11	0/12	0.48
At ICU admission
mechanical ventilation, yes/no	19/6	12/10	0.01
vasopressor use, yes/no	19/6	3/19	<0.001
APACHE II score, mean ± SD	17 ± 5a	12 ± 7b	0.008
PaO2/FiO2 ≤ 200, yes/no	18/6	3/15	<0.001
Evolution
length of hospital stay (days), median (range)	17 (8.5 to 33)	6 (3 to 15)	0.001
death, yes/no	9/16	0/22	0.001

PaO₂, arterial oxygen tension; FiO₂, fraction of inspired oxygen.

^an = 24,

^bn = 20,

^cNo morbid obesity.