Health insurer Humana ( HUM ) reported higher first-quarter profit but offered mixed earnings guidance. The Louisville, Ky.-based company had net income of $67.8 million, or 41 cents a share, vs. $31.2 million, or 19 cents, in the year-ago period, meeting the consensus estimate according to Thomson First Call. Total revenue jumped 12% to $3.28 billion. Writedowns and other charges totaled $18.8 million, or 12 cents a share, during the 2003 earnings period. Humana said its pretax margin rose to 3.1% from 1.6% a year ago. Looking ahead, Humana forecast second-quarter earnings of 37 cents to 39 cents a share, compared with a consensus forecast of 41 cents a share. Full-year EPS is seen at $1.60 to $1.65, with revenue of about $13 billion.Consensus forecasts are for $1.62 and $13.18 billion. "We continue to expect 2004 revenue, earnings and cash flows to be the highest in Humana's history as a health benefits company," the company said. Shares closed at $19.01 Friday.