Table 2.

Comparison of in-hospital mortality between the methylprednisolone plus cyclophosphamide and methylprednisolone alone groups

	OR*	95% CI†	P value
Unadjusted	1.99	1.32 - 3.01	0.0009
Instrumental variable analysis	1.11	0.19 - 6.43	0.91
Instrumental variable analysis, patients with CT‡	1.44	0.21 - 9.97	0.71
Instrumental variable analysis, patients with CT, without furosemide	0.95	0.04 - 23.97	0.97

*OR, odds ratio

†CI, confidence interval

‡CT, computed tomography