From:  Using social networks to predict cognitive resilience among adults aged ≥ 80 years: insights from the Framingham Heart Study

 Berkman-Syme Social Network Index components.

Social Network IndexCategory
b1. How many close friends do you have, people that you feel at ease with, can talk to about private matters?(1) ≤ 2
(2) > 2
b2. How many of these close friends do you see at least once a month?(1) ≤ 2
(2) > 2
b3. How many relatives do you have, people, that you feel at ease with, can talk to about private matters?(1) ≤ 2
(2) > 2
b4. How many of these relatives do you see at least once a month?(1) ≤ 2
(2) > 2
b5. Do you participate in any groups such as a senior center, social or work group, religious-connected group, self-help group, or charity, public service, or community group?(1) No
(2) Yes
b6. About how often do you go to religious meetings or services?(1) Never or almost never/Once or twice a year
(2) Every few months or more frequently
b7. Is there someone available to you whom you can count on to listen to you when you need to talk?(1) None/a little of the time
(2) Some/most/all of the time
b8. Is there someone available to give you good advice about a problem?(1) None/a little of the time
(2) Some/most/all of the time
b9. Is there someone available to you who shows you love and affection?(1) None/a little of the time
(2) Some/most/all of the time
b10. Can you count on anyone to provide you with emotional support (talking over problems or helping you make a difficult decision)?(1) None/a little of the time
(2) Some/most/all of the time
b11. Do you have as much contact as you would like with someone you feel close to, someone in whom you can trust and confide?(1) None/a little of the time
(2) Some/most/all of the time
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