Table 2

Occurrence of various renal abnormalities in 235 patients with early rheumatoid arthritis (RA) at entry and during the follow up period, and in controls

	Proteinuria (%)	Haematuria (%)	RCr^2-152 (%)
Early RA^2-150(n=235)
At entry	0 (0)	40 (17)	2 (1)
During observation period
Persistent	17 (7)	43 (18)
Intermittent	6 (3)	56 (24)
Total	23 (10)	99 (42)	14 (6)
p Value^2-151	<0.005	<0.0001	<0.05

Controls^2-150 (n=100)
During 42 months
Persistent	1 (1)	10 (10)
Intermittent	0 (0)	7 (7)
Total	1 (1)	17 (17)	1 (1)

↵2-150 The study of patients with early RA was prospective and that of controls was retrospective.
↵2-151 p Value for the difference of frequency of renal abnormalities between early RA and control.
↵2-152 RCr = raised serum creatinine concentration.