Table 3.

RIDI in classification for predictive scores for doubling of serum creatinine or ESRD

	Doubling Serum Creatinine or End-Stage Renal Disease
	RIDI Estimate (%)	P
24-hour UAE versus FMV ACR	39.5	<0.0001
24-hour UAE versus 24-hour UPE	1.0	0.684
24-hour UAE versus FMV UAC	6.1	0.154
FMV UAC versus FMV ACR	31.5	<0.0001

The RIDI compares a model including 24-hour urinary albumin excretion with the equivalent model in which 24-hour urinary albumin excretion is replaced by either 24-hour urinary protein excretion, first-morning void urinary albumin concentration, or first-morning void albumin:creatinine ratio. Finally, a model with first-morning void urinary albumin concentration is compared with a model including first-morning void albumin:creatinine ratio. For each line, the models replace the second listed proteinuria measure with the first mentioned proteinuria measure. Models were adjusted for age, gender, race, and treatment allocation. ACR, albumin:creatinine ratio; FMV, first-morning void; UAC, urinary albumin excretion; UAE, urinary albumin excretion; UPE, urinary protein excretion.