Table 1.

Baseline personal socioeconomic and neighborhood characteristics, and incident mobility impairment among 3,684 participants included in the analyses

	Full Sample	Whites		Blacks
		Women	Men	Women	Men
	(n = 3,684)	(n = 1,702)	(n = 1,452)	(n = 296)	(n = 234)
Age in years (SD)	72 (5)	72 (5)	73 (6)	72 (5)	72 (5)
Income (%)
< $12,000	10	10	3	40	15
$12,000–$24,999	25	27	21	25	33
$25,000–$34,999	33	32	29	19	30
≥ $35,000	25	23	32	9	16
Unknown	7	8	5	7	6
Education (%)
Incomplete High School	24	21	23	38	38
Complete High School or GED	37	44	33	29	26
1–3 years College or Vocational	15	16	15	14	15
4 Years College or More	23	19	30	19	21
Neighborhood score
Median (25th,75th)	2.8 (-0.9, 6.2)	3.2 (0.0, 6.7)	3.3 (0.0, 6.8)	-3.5 (-5.1, 0.3)	-3.2 (-5.4, 0.85)
Incidence of mobility impairment (cases/100 person-years)	10	11	9	15	11