Schatzberg and Ohayon conducted a cross-sectional telephone survey of nearly 19,000 subjects from 15 to 100 years of age residing in the United Kingdom, Germany, Italy, Portugal, and Spain. Among those studied, 17 percent had some form of chronic pain symptoms, and 4 percent reported depressive symptoms. However, 43 percent of those with depressive symptoms also had chronic pain. For patients 65 and older, 20.4 percent reported at least one symptom of pain, compared with only 9.4 percent of patients under the age of 25. Headaches and back pain were the most commonly reported symptoms.