NEW YORK — One in 4 Alzheimer's deaths in the United States are now occurring at home — a startling increase that marks a shift away from hospitals and nursing homes, according to a report released Thursday. Alzheimer's deaths in hospitals and nursing homes or other long-term care facilities shrank from more than 80 percent to 60 percent over 15 years. Meanwhile, those dying at home rose from 14 percent to 25 percent, the Centers for Disease Control and Prevention found.