Table 3.

Linear regression analyses of PD-1.

Comparison with interstitial PD-1	β	p value
Age—years	0.2999	0.1243
Creatinine—mg/dL	−0.2893	0.4450
eGFR—mL/min	−0.0759	0.0016
BUN—mg/dL	0.2082	0.3026
Albuminuria/g creatinine—mg/g	0.0952	0.5936

BUN, blood urea nitrogen; eGFR, estimated glomerular filtration rate (CKD-EPI); PD-1, programmed cell death protein 1.