This research project will look at the relationship between baseline variables, and the new onset of microalbuminuria and the response to treatment with an angiotensin receptor blocker, losartan, in a cohort of 246 early hypertensives and normotensives who are being brought back for a 4-5 year follow up visit as part of a continuing project. We hypothesize that the new onset of microalbuminuria is associated with higher blood pressure levels at baseline and 1 year as well as being associated with elevated left ventricular mass index. The rate of new onset microalbuminuria in non-diabetics is not established and this prospective study will provide data.