LAWRENCE, Kan. — The visitor to Haskell Indian Nations University detailed his roaring 20s: drug addict, garbage collector, suicidal burnout once told by a doctor that he was mentally retarded. It was a curious way to inspire a group of young American Indian students long surrounded by these types of problems. Until he got to the good part.

“I never shared this with anyone until I got my Ph.D.,” he said.

His American name is David A. Patterson, his Cherokee name Adelv unegv Waya, or Silver Wolf. He is a tenure-track assistant professor at the George Warren Brown School of Social Work at Washington University in St. Louis. His groundbreaking research on the pitfalls facing Native Americans is both informed and inspired by his own story of deliverance.

“Mentally retarded? I wish I could find that doctor now,” Dr. Patterson said, the students transfixed.

Dr. Patterson, 49, has devoted what he considers his second life to studying the quicksand that just about swallowed him, and that continues to imperil American Indians more than any other ethnic group. About 18 percent of American Indian or Alaska Native adults need substance-abuse treatment, almost twice the national average, according to figures from the federal government. Deaths from alcoholism, diabetes, homicide and suicide are two to six times as high among Native Americans as they are among other groups, according to various studies.