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. 2009 Apr 23;24(6):695–701. doi: 10.1007/s11606-009-0952-6

Table 1.

Sample characteristics

Characteristic Sample weighted mean or proportion and 95% confidence interval (n = 2,847) Sampling Frame mean or proportion (n = 6,384,199)
Age 75.6 (75.4 – 75.9) 76.5
Age 65–69, % 21.4 (19.8 – 23.0) 20.3
Age 70–74, % 27.2 (25.5 – 28.9) 25.6
Age 75–79, % 23.5 (21.9 – 25.2) 22.4
Age 80–84, % 18.1 (16.7 – 19.7) 17.0
Age 85+ , % 9.8 (8.8 – 11.1) 14.8
Male, % 42.5 (40.6 – 44.4) 41.5
Non-Hispanic white, % 85.0 (83.7 – 86.1) 86.6
Black, % 6.3 (5.8 – 6.9) 8.1
Hispanic, % 4.6 (3.8 – 5.5) 1.8
Other, % 4.2 (3.4 – 5.0) 3.5
Less than HS education, % 21.4 (19.8 – 23.0) 19.3*

*Imputed from mean US Census ZIP level education