WASHINGTON  More than 90 percent of nursing homes were cited for violations of federal health and safety standards last year, and for-profit homes were more likely to have problems than other types of nursing homes, federal investigators say in a report issued on Monday.

About 17 percent of nursing homes had deficiencies that caused “actual harm or immediate jeopardy” to patients, said the report, by Daniel R. Levinson, the inspector general of the Department of Health and Human Services.

Problems included infected bedsores, medication mix-ups, poor nutrition, and abuse and neglect of patients.

Inspectors received 37,150 complaints about conditions in nursing homes last year, and they substantiated 39 percent of them, the report said. About one-fifth of the complaints verified by federal and state authorities involved the abuse or neglect of patients.