You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Outcome", "Participant", "Intervention"].

Please return the output as a JSON object of the format: {"Participant" : ["patients with COPD", ...], "Intervention" : ["Atenolol", ...], "Outcome" : ["blood pressure", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

A web-based patient activation intervention to improve hypertension care : study design and baseline characteristics in the web hypertension study . BACKGROUND Despite the known health risks of hypertension , many hypertensive patients still have uncontrolled blood pressure . Clinical inertia , the tendency of physicians not to intensify treatment , is a common barrier in controlling chronic diseases . This trial is aimed at determining the impact of activating patients to ask providers to make changes to their care through tailored feedback . METHODS Diagnosed hypertensive patients were enrolled in this RCT and randomized to one of two study groups : ( 1 ) the intervention condition -- Web-based hypertension feedback , based on the individual patient 's self-report of health variables and previous BP measurements , to prompt them to ask questions during their next physician 's visit about hypertension care ( 2 ) the control condition -- Web-based preventive health feedback , based on the individual 's self-report of receiving preventive care ( e.g. , pap testing ) , to prompt them to ask questions during their next physician 's visit about preventive care . The primary outcome of the study is change in blood pressure and change in the percentage of patients in each group with controlled blood pressure . CONCLUSION Five hundred participants were enrolled and baseline characteristics include a mean age of 60.0 years ; 57.6 % female ; and 77.6 % white . Overall 37.7 % participants had uncontrolled blood pressure ; the mean body mass index ( BMI ) was in the obese range ( 32.4 ) and 21.8 % had diabetes . By activating patients to become involved in their own care , we believe the addition of the web-based intervention will improve blood pressure control compared to a control group who receive web-based preventive messages unrelated to hypertension .
{"Intervention": ["to prompt them to ask questions during their next physician \u0027s visit about", "the intervention condition -- Web-based hypertension feedback , based on the individual patient \u0027s self-report of health variables and previous BP measurements , to prompt them to ask questions during their next physician \u0027s visit about hypertension care", "preventive health feedback", "web-based patient activation intervention", "the control condition -- Web-based", "preventive care", ", based on the individual \u0027s self-report of receiving preventive care"], "Outcome": ["change in blood pressure", "blood pressure control", "change in the percentage of patients in each group with controlled blood pressure"], "Participant": ["female", "uncontrolled blood pressure", "diabetes", "Five hundred", "hypertensive", "60.0 years"]}