Variable

b

SE (b)

P value

OR

95% confidence interval of OR

Upper limit

lower limit

Wash red blood cell suspension

0.958

0.522

0.066

2.607

1.005

8.113

No fever before blood transfusion; fever after blood transfusion

1.982

0.626

0.002

7.258

2.454

31.157

Fever before blood transfusion

0.408

0.343

0.234

1.504

0.778

3.007