Table 4.

Relation of Extraversion, Late-Life Activities and Change in Motor Function^*

Terms	Model A Coefficient (S.E., p)	Model B Coefficient (S.E., p)	Model C Coefficient (S.E., p)
Time	-0.169 (0.022, <0.001)	-0.187 (0.028, <0.001)	-0.131(0.018,<0.001)
Extraversion	0.005 (0.003, 0.054)	0.006 (0.003, 0.020)	0.008 (0.003,0.0010)
Extraversion *Time	0.0011 (0.001, 0.051)	0.0018 (0.001, 0.007)	0.0016 (0.001,0.005)
Social Activity	0.187 (0.028, <0.001)
Social Activity *Time	0.022 (0.007, <0.001)
Cognitive Activity		0.017 (0.004, <0.001)
Cognitive *Time		0.002 (0.0010, 0.048)
Physical Activity			0.017 (0.004, <0.001)
Physical Activity *Time			0.002 (0.001, 0.048)

^*Based on linear mixed-effect models which shows the annual rate of change in the global motor score (Time); the increase in average motor function for a 1-point higher score on the Extraversion scale (Extraversion) as well as the average increase in the rate of change in motor function (Extraversion * Time) and controls for social activity, age, sex, education and their interactions with Time. Significance was based on a t-statistic from the mixed-effect model. The degrees of freedom for the slope terms including the annual rate of change in Global Motor (Time) and the interaction of neuroticism with the annual rate of change in global motor (Global motor × Time) have 4450 degrees of freedom and the main effect terms each have 977 degrees of freedom. Units of comparison: Time in years since baseline, age and education in years. Model B shows analogous results with terms to control for cognitive activity and its interaction with Time (3486 degrees of freedom for the interaction terms and the main effect terms each have 866 degrees of freedom); Model C shows analogous results with terms to control for physical activity and its interaction with Time (4450 degrees of freedom for the interaction terms and the main effect terms each have 977 degrees of freedom).