Table I.

Association between the duration of hypertension and hypertensive renal disease (n).

Duration of disease (years)	n	Microscopic haematuria	Proteinuria (g/24-h urine)			Scr level (μmol/l)
			<1 g	1–3 g	>3 g	Normal	133–422	>422
6–10	15	2	9	6	0	14	1	0
11–15	12	7	3	7	2	9	3	0
16–20	14	11	1	10	3	10	4	0
>20	6	6	0	1	5	2	2	2
Total	47	26	13	24	10	35	10	2

Scr, serum creatinine.