Table 1.

Summary of adequacy assessment of native renal biopsies

Period	Total biopsies (n)	Adequate biopsies (n,%)	Suboptimal biopsies (n,%)	Inadequate biopsies (n,%)	Difference in adequacy (%)*	p value
1	127	40 (31%)	43 (34%)	44 (35%)	NA	NA
2	432	311 (72%)	54 (13%)	67 (16%)	+40% (31, 50)	< 0.0001
3	104	94 (90%)	2 (2%)	8 (8%)	+18% (8, 29)	<0.0001

*Change of percentage of adequacy in the period in question compared to the preceding period, i.e. comparing period 2 to period 1, and comparing period 3 to period 2.