Largest ever study on self-harm in England complete

Self-harm consists of things like self-inflicted cutting and overdosing (referred to as poisoning).
The study concluded the following:

• 1/10 teenage girls 'self-harm' each year.
• Girls are 4 times more likely to self-harm than boys.
• Only 13% of all incidents result in a hospital visit.
• Poisoning is the most prevalent one in hospitals, but cutting is more prevalent over-all, accounting for 64.5% and opposed to poisoning at 31%.
• For both sexes, those who smoke cigarettes, drink alcohol or take any other drugs are slightly more likely to self-harm.
• Those who have recently been worried about their sexual orientation are more likely to self-harm.
• The majority say the act is impulsive as opposed to planned for a long time.
• Just under half say it only comes into their minds less than an hour before acting on it.
• 20% don't tell anyone about it at any stage (except whe conducting surveys, apparently).
• The vast majority of those who talk about it talk with their friends, as opposed to parents or siblings.