Table 2.

Social network size and risk of incident stroke: The ARIC study 1987–2010.

	Social Network Score
	Small Social Network	Moderately Small Social Network	Moderately Large Social Network	Large Social Network
	≤20	21–25	26–30	≥31
Number of participants	380	778	1908	10620
Person years	5867	12541	31002	178775
Total incident strokes	41	51	119	694
Model 1	1.60 (1.17–2.20)	0.98 (0.73–1.30)	0.93 (0.77–1.13)	1.00
Model 2	1.43 (1.03–2.00)	0.92 (0.69–1.23)	0.90 (0.73–1.10)	1.00
Model 3	1.36 (0.97–1.90)	0.89 (0.66–1.20)	0.87 (0.71–1.06)	1.00
Model 4	1.44 (1.02–2.04)	0.93 (0.69–1.26)	0.90 (0.73–1.11)	1.00

Model 1: Adjust for age, sex and race

Model 2: Adjusted for Model 1 + socioeconomic status (education attainment, income, occupation) +marital status

Model 3: Adjusted for Model 2 + behavioral risk factors (smoking status, alcohol drinking, physical activity)

Model 4: Adjusted for Model 3 + major stroke risk factors (hypertension, diabetes, LDL, HDL, lipid-lowering medication use, and BMI)