Table 1.

Baseline Values and Unconditional Change Over 2 Years in Balance Confidence, Impairment, Functional Limitation, and Disability Variables.

Variable	Baseline value M ± SD	Intercept estimate (standard error)	Linear estimate (standard error)	Quadratic estimate (standard error)
Balance confidence
Activity-Specific Balance Confidence Scale	78.16 ± 16.72	4.35 (.01)***	−.002 (.001)***
Impairments
Berg Balance Test	48.91 ± 5.62	3.89 (.007)***	.001 (.001)	−.0001 (<.00001)*
Hip flexion strength (normalized for height and weight)	0.15 ± 0.05	0.15 (.003)***	.001 (.0005)	−.00003 (.00001)*
Functional limitations
Timed-Up and Go Test (seconds)	12.62 ± 8.65	2.54 (.04)***	.02 (.003)***	−.0004 (.0001)**
Repeated chair stands (seconds)	15.77 ± 5.88	2.73 (.06)***	.01 (.004)*
Disability
Physical activitya	88.95 ± 47.47	4.53 (.03)***	−.01 (.001)***
Activity restrictionsb	8.90 ± 1.30	8.95 (.07)***	−.01 (.004)**
Lubben’s social network	32.47 ± 7.53	32.16 (.45)***	−.07 (.01)***

Note. Each line reports an individual univariate model with no predictors. Higher scores indicate better performance on the Berg Balance Test, hip flexion strength, physical activity, activity restrictions, and social networks and indicate worse performance on the Timed-Up and Go Test and repeated chair stands.

^aMeasured with the Physical Activity Scale for the Elderly.

^bMeasured with the Survey of Activities and Fear of Falling in the Elderly Activity Restriction subscale.

^*p < .05.

^**p < .01.

^***p < .001.

^****p < .0001.