Table 1 Descriptive statistics for subjects included in analyses versus those excluded owing to missing data at baseline

VariableBaseline 1988 sample, n = 1,189Subjects with complete 1988 data, n = 779Subjects missing IL-6 data, n = 60Subjects missing covariate data, n = 350p Value for group differences
Values are means (SD) or percentages. The p values reflect F tests for continuous variables and χ2 tests for categorical variables for group differences among the second to fourth data columns. Where overall test was significant, groups with the same superscript have significant post hoc differences between them.
IL-6 = interleukin-6; HBA1c = hemoglobin A1c.
Cognitive scores, 198852.9 (9.9)53.5 (9.8)152.4 (11.2)51.7 (9.8)10.02
    % low51.748.8256.757.620.02
IL-6, pg/mL4.55 (5.5)4.61 (5.6)4.14 (4.8)0.4
    % middle tertile33.332.936.6
    % top tertile33.534.128.70.5
Age, y74.3 (2.7)74.3 (2.7)73.7 (2.6)74.4 (2.7)0.2
Men, %45473483830.01
Race, % nonwhite191830190.07
Education, y10.6 (3.3)10.7 (3.3)10.2 (3.7)10.4 (3.2)0.2
Av. annual income, $15,41116,22615,00812,8750.001
(12,335)(12,591)4(13,408)(10,830)4
Body mass index, kg/m226.0 (4.2)26.0 (4.2)25.7 (4.3)26.1 (4.2)0.8
Average HBA1c, %6.8 (1.9)6.9 (2.0)6.3 (1.2)6.6 (1.1)0.03
Any alcohol last mo, %40435333450.01
Ever smoker, %525352510.9
Activity score20.8 (26.6)21.9 (26.7)21.7 (26.1)18.1 (26.3)0.08
Diabetes mellitus, %13148120.4
Cancer, %181913170.4