Table 5.

Multivariate analysis for the occurrence of eGFR decrease of >50%

	HR	95% CI	P value
Female	1.177	0.691 to 2.006	0.548
Age	1.017	0.997 to 1.037	0.103
Hypertension	1.743	0.994 to 3.057	0.053
Diabetes mellitus	0.939	0.533 to 1.656	0.829
Acute pyelonephritis	3.495	1.942 to 6.289	<0.001
Acute kidney injury
Stage I	1.580	0.706 to 3.536	0.265
Stage II	3.284	1.354 to 7.965	0.009
Stage III	6.425	2.599 to 15.881	<0.001
Group 2 (obstruction duration >7 days)	1.854	1.095 to 3.140	0.022

eGFR, estimated glomerular filtration rate.