Variables  Non late referral  Late Referral
group  75<  75>  75<  75> 
Number (%)  135 (62)  83 (38)  44 (66)  23 (34) 
DM   56  (41)  7 (8)  35 (80),**  17 (74)** 
GN  37 (32)  21 (63)  4 (9)**  3 (12) 
HT  42 (27)  52 (27)  2 (5)**  2 (9)** 
Others  0 1 (2)  3 (6)   
Values are expressed as count (percentage). DM, diabetic nephropathy; GN, glomerular nephritis; HT, hypertensive nephrosclerosis. **indicates P<0.01 compared with the values of each corresponding age.
Table 4: Comparison of underlying disease of patients between non late referral population and late referral.