The life events that have been shown to increase risk most significantly are
Alcohol use disorder
Studies have shown that individuals who binge drink, rather than drink socially, tend to have higher rates of suicidal ideation
Certain studies associate those who experience suicidal ideation with higher alcohol consumption
Not only do some studies show that solitary binge drinking can increase suicidal ideation, but there is a positive feedback relationship causing those who have more suicidal ideation to have more drinks per day in a solitary environment
Minoritized gender expression and/or sexuality
Unemployment
Chronic illness or pain
Death of family members or friends
End of a relationship or being rejected by a romantic interest
Major change in life standard (e.g. relocation abroad)
Other studies have found that tobacco use is correlated with depression and suicidal ideation
Unplanned pregnancy
Bullying, including cyberbullying and workplace bullying
Previous suicide attempts
Having previously attempted suicide is one of the strongest indicators of future suicidal ideation or suicide attempts
Military experience
Military personnel who show symptoms of PTSD, major depressive disorder, alcohol use disorder, and generalized anxiety disorder show higher levels of suicidal ideation
Community violence
Undesired changes in body weightWomen: increased BMI increases chance of suicidal ideation
Men: severe decrease in BMI increases chance of suicidal ideation
In general, the obese population has increased odds of suicidal ideation in relation to individuals that are of average-weight
Exposure and attention to suicide related images or words

Family history
Parents with a history of depression
Valenstein et al. studied 340 adult offspring whose parents had depression in the past.
Sudden acquired retinal degeneration syndrome (SARDS) is a disease in dogs causing sudden blindness. It can occur in any breed, but female dogs may be predisposed. Approximately 4000 cases are seen in the United States annually. Characteristics
Symptoms include sudden permanent blindness, but may occur more slowly over several days, weeks or months, dilated pupils. Pupillary light reflexes  are usually reduced but present; the slow phase mediated by melanopsin in retinal ganglion cells is retained. Other symptoms commonly seen are similar to those seen with Cushings disease and include increased water consumption and urination, weight gain, confusion, restlessness, behavioral changes and lethargy. These symptoms may develop over a few months preceding the onset of SARDS. Clinical signs and disease progression vary markedly among individual animals, depending on the number and type of hormones that are increased, the degree of hormone elevation, and the age of the dog.Some owners notice a more obvious "eye shine" in photographs due to the dilated pupils and retinal atrophy creating what is described as a "hyper-reflective tapetum". Causes
The cause of SARDS is considered to be idiopathic and the veterinary community is divided as to its cause, but the most common hypotheses on the causes of the disease possibly include autoimmune disease, or exposure to toxins. Autoimmune disease as a cause is controversial because some studies have supported the presence of antiretinal autoantibodies in dogs with SARDS, but others have failed to show a link.