Social Networks and Memory over 15 Years of Followup in a Cohort of Older Australians: Results from the Australian Longitudinal Study of Ageing

Table 2

Summary of effects of friends and total social networks on cognitive function¹.

Covariate						Males			Females
	β ^1	se^2	P-value	β ^3	se	P-value	β ^3	se	P-value	β ^3	se	P-value
Total^1
Time	−0.16	0.02	<0.001	−0.15	0.02	<0.001	−0.17	0.02	<0.001	−0.15	0.04	<0.001
Network mid tertile	0.77	0.26	0.004	0.62	0.22	0.005	0.59	0.30	0.052	1.00	0.49	0.040
Network upper tertile	1.09	0.26	<0.001	0.83	0.23	<0.001	0.68	0.31	0.029	1.38	0.71	0.004
Friends^1
Time	−0.23	0.04	<0.001	−0.25	0.04	<0.001	−0.21	0.04	<0.001	−0.38	0.10	0.001
Friends mid tertile	0.13	0.28	0.646	0.00	0.28	0.986	0.51	0.32	0.112	−0.99	0.55	0.073
Friends upper tertile	0.38	0.28	0.170	0.25	0.28	0.359	0.37	0.32	0.246	−0.03	0.54	0.959
Friends mid tertile × time	0.10	0.05	0.052	0.11	0.05	0.034	0.05	0.06	0.418	0.32	0.12	0.010
Friends upper tertile × time	0.08	0.05	0.107	0.10	0.05	0.054	0.07	0.06	0.193	0.22	0.11	0.051

¹Model also includes sex, age group.
²se is standard error.
³Model also includes sex, age group, education, marital status, disability status, chronic conditions, depressive symptoms, alcohol consumption and smoking status.