53215
People with bipolar disorder often have other co-existing psychiatric conditions such as anxiety ( present in about 71 % of people with bipolar disorder ) , substance use ( 56 % ) , personality disorders ( 36 % ) and attention deficit hyperactivity disorder ( 10 – 20 % ) which can add to the burden of illness and worsen the prognosis .
 anxiety
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 anxiety