The following list was published in the 7th Biennial Report of the Oregon State Insane Asylum. It lists “causes for insanity” of people admitted to the hospital between December 1894 and November 1896.
| Cause | Male | Female | Total |
| Brain Softening | 1 | 1 | |
| Business Trouble | 4 | 4 | |
| Childbirth | 4 | 4 | |
| Christian Science | 1 | 1 | |
| Concussion of Brain | 1 | 1 | |
| Congenital | 1 | 1 | |
| Cerebral embolism | 5 | 5 | |
| Domestic Trouble | 4 | 6 | 10 |
| Disappointment in Love | 1 | 2 | 3 |
| Dissipation | 2 | 2 | |
| Dementia | 2 | 2 | |
| Epilepsy | 22 | 8 | 30 |
| Exposure and solitude | 1 | 1 | |
| Exposure and sickness | 3 | 3 | |
| Fright | 1 | 1 | |
| Financial Trouble | 7 | 7 | |
| Grief | 2 | 5 | 7 |
| General debility | 1 | 1 | |
| Heredity | 10 | 15 | 25 |
| Hydrocephalus | 2 | 2 | |
| Idiocy | 5 | 3 | 8 |
| Intemperance | 28 | 3 | 31 |
| Ill health | 3 | 4 | 7 |
| Injury to head | 16 | 1 | 17 |
| Injury | 4 | 1 | 5 |
| Injury and religion | 1 | 1 | |
| Intemperance and epilepsy | 1 | 1 | |
| La grippe | 1 | 1 | |
| Loss of sleep | 2 | 2 | |
| Lead poisoning | 1 | 1 | |
| Morphine habit | 18 | 5 | 23 |
| Masturbation | 24 | 24 | |
| Meningitis | 2 | 2 | |
| Menopause | 6 | 6 | |
| Morphine and cocaine | 4 | 1 | 5 |
| Mental strain | 2 | 2 | |
| Melancholia | 3 | 3 | |
| Nervous prostration | 3 | 3 | |
| Old age | 8 | 2 | 10 |
| Overstudy | 2 | 2 | |
| Overwork | 2 | 4 | 6 |
| Opium habit | 4 | 3 | 7 |
| Paralysis | 6 | 1 | 7 |
| Paranoia | 1 | 1 | |
| Pneumonia | 2 | 2 | |
| Puerperal trouble | 4 | 4 | |
| Religion | 9 | 6 | 15 |
| Removal of ovaries | 1 | 1 | |
| Spinal meningitis | 2 | 2 | 4 |
| Spiritualism | 2 | 2 | 4 |
| Syphilis | 3 | 3 | |
| Solitude | 2 | 2 | |
| Scarlatina | 1 | 1 | |
| Starvation | 1 | 1 | |
| Suppressed eruption | 1 | 1 | |
| Sunstroke | 5 | 5 | |
| Typhoid fever | 1 | 1 | 3 |
| Trouble | 2 | 1 | 3 |
| Tobacco | 1 | 1 | |
| Unknown | 199 | 76 | 275 |
| Uterine disease | 11 | 11 | |
| Worry | 3 | 5 | 8 |
