Table 2.

Criteria adopted to judge the maintenance of target values over time

Data presence* % Data permanence‡ %	Class 1 from 1 to 4 months of dialysis	Class 2 from 5 to 8 months of dialysis	Class 3 from 9 to 12 months of dialysis
Group 3 "entire permanence"	>= 99%	>= 90%	>= 80%
Group 2 "partial permanence"		>= 85% <90%	>= 75% <80%
Group 1 "limited permanence"		>= 80% <85%	>= 70% <75%
Group -1 "insufficient permanence"	<99%	< 80%	<70%

Percentages of data presence and data permanence within the set limits per parameter in relation to the length of the dialysis treatment

*total number of determinations expected for each considered parameter

‡value of each determination vs. established ranges for each parameter.