From: Absence of association between angiotensin converting enzyme polymorphism and development of adult respiratory distress syndrome in patients with severe acute respiratory syndrome: a case control study
ICU
Non-ICU
n = 35
n = 105
Genotypic frequency
DD
3 (9%)
12 (11%)
ID
13 (37%)
52 (50%)
II
19 (54%)
41 (39%)
χ2 value = 2.489, df = 2, p = 0.288
Allelic frequency
D
19 (27%)
76 (36%)
I
51 (73%)
134 (64%)
χ2 value = 1.424, df = 1, p = 0.233