Sleep disturbance is common among patients in recovery from alcohol addiction. A population-based study was conducted in which 18% of alcohol-dependent persons reported sleep disturbance. Another study of 74 patients that were followed for an average of 5 months after alcohol treatment found that insomnia was a major predictor of relapse. It revealed that 60% of patients with baseline insomnia experienced recurrent drinking, while only 30% of those without insomnia did. Sleep disturbance levels are higher while abstaining from alcohol, which affects 25 to 60 percent of patients in early recovery. Studies have also shown that sleep problems can last for many months after quitting drinking.