Table 4.

Multilevel Multivariable Logistic Regression Model for Choosing Plasma Exchange

	OR	95% CI		P
Age (per 1 y increase)	0.98	0.96	0.99	<0.01
Male sex	1.25	0.73	2.15	0.41
Country (reference = Canada)
Other	0.74	0.20	2.74	0.66
United Kingdom	2.61	1.09	6.22	0.03
United States	0.98	0.48	1.99	0.96
Previous dialysis	2.70	1.12	6.52	0.03
Previous plasma exchange	5.62	2.72	11.61	<0.01
Previous infection	1.14	0.70	1.85	0.60
Scenario reference = scenario 1 (serum creatinine level, 150 μmol/L)
scenario 2 (serum creatinine level, 250 μmol/L)	1.08	0.76	1.54	0.65
scenario 3 (serum creatinine level, 350 μmol/L)	1.93	1.35	2.77	<0.01
scenario 4 (serum creatinine level, 450 μmol/L)	1.61	1.13	2.29	<0.01
scenario 5 (serum creatinine level, 600 μmol/L)	1.26	0.88	1.79	0.21

Note: Scenarios 1, 2, 3, 4, 5 are the 5 different cases with increasing baseline risks of dialysis and serious infection.

Abbreviations: CI, confidence interval; OR, odds ratio.