Relationship of the presence of the S and T lesions of the Oxford Classification with key clinical variables. There were significant associations between the presence of segmental glomerular sclerosis (S1) and 24-hour urine protein excretion and eGFR (CKD-EPI) at the time of diagnosis, but not mean arterial blood pressure. Similarly, there were significant associations between the extent of tubulointerstitial inflammation and fibrosis (T1 and T2) and 24-hour urine protein excretion and eGFR (CKD-EPI) at the time of kidney biopsy, as well as mean arterial blood pressure. eGFR, estimated glomerular filtration rate; CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration.