The WHO (World Health Organization) World Health Survey studied >240,000 adults, aged ≥18 years, across 60 countries.1
An average of 9.3–23.0% of participants with one or more chronic physical disease also had comorbid depression.1 Individuals with a chronic condition were significantly more likely to suffer depression than those without a chronic condition (p<0.0001).1 Furthermore, depression was associated with lower overall health scores than those observed with other chronic conditions, such as asthma, angina, arthritis and diabetes, and the burden of these chronic conditions was increased when patients had co-morbid depression.1