Table 2.

Linear regression coefficients (95% CIs) for cross-sectional associations of social network characteristics with global cognitive function

Social network measure	Model 1a		Model 2b
	b	95% CI	b	95% CI
Network size of friends
None	0.01	− 0.05, 0.06	0.02	-0.03, 0.07
1 or 2	Reference		Reference
3 to 5	0.08	0.01, 0.15	0.08	0.01, 0.14
More than 5	0.18	0.06, 0.30	0.13	0.02, 0.24
P-trend	0.003		0.036
Network size of relatives
None	0.00	-0.05, 0.05	0.01	−0.04, 0.06
1 or 2	Reference		Reference
3 to 5	0.04	−0.02, 0.11	0.05	0.00, 0.11
More than 5	0.16	0.03, 0.28	0.12	0.01, 0.24
P-trend	0.010		0.074
Contact frequency with friends
No friends	−0.12	− 0.20, − 0.05	0.01	− 0.06, 0.09
Less than once a month	Reference		Reference
About once a month	0.06	0.01, 0.12	0.04	−0.01, 0.08
Several times a month	0.02	−0.03, 0.08	0.01	−0.05, 0.06
About once a week	0.01	−0.04, 0.07	0.03	−0.03, 0.08
Several times a week	−0.03	− 0.10, 0.03	0.01	−0.05, 0.07
P-trend	0.490		0.655
Contact frequency with relatives
No relatives	−0.01	− 0.13, 0.11	− 0.01	− 0.13, 0.10
Less than once a month	Reference		Reference
About once a month	−0.02	− 0.08, 0.05	0.00	−0.06, 0.06
Several times a month	0.10	0.04, 0.17	0.09	0.03, 0.15
About once a week	0.05	−0.01, 0.11	0.06	0.00, 0.11
Several times a week	0.05	−0.01, 0.11	0.03	−0.03, 0.08
P-trend	0.017		0.091
Participation in social activities
Never or not a member	Reference		Reference
At least several times a year	0.19	0.12, 0.25	0.07	0.01, 0.13
Several times a month or more	0.22	0.16, 0.29	0.10	0.04, 0.16
P-trend	< 0.001		< 0.001

^aAdjusted for country, age and sex

^bAdjusted for country, age, sex, education, household amenities, work status, marital status, smoking status, alcohol drinking frequency, alcohol intake, physical activity, self-rated health, number of chronic diseases and depressive symptoms