Table 3.

Cox proportional hazard model of baseline risk factors for development of persistent microalbuminuria in 277 patients with type 1 diabetes followed for 18 years

Variable	Relative risk (95% CI)	P value
Log10 urinary albumin excretion rate (per 10-fold increase)	3.78 (1.57 to 9.13)	0.003
Sex (male v female)	2.41 (1.43 to 4.06)	0.001
Mean arterial blood pressure (per 10 mm Hg increase)	1.38 (1.20 to 1.57)	<0.001
Haemoglobin A1c concentration (per 1% increase)	1.18 (1.04 to 1.32)	<0.01
Height (per 1 cm increase)	0.96 (0.95 to 0.98)	<0.001

Not included in final model were age at onset, weight, smoking status, serum cholesterol, and fasting plasma C peptide level.