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Table 2 Baseline demographic characteristics of the Longitudinal Research on Aging Drivers (LongROAD) study participants

From: Longitudinal Research on Aging Drivers (LongROAD): study design and methods

Characteristic Study Site Total
(n = 2990)
No. (%)
Ann Arbor, MI (n = 601) Baltimore, MD (n = 588) Cooperstown, NY (n = 601) Denver, CO (n = 600) San Diego, CA (n = 600)
No. (%) No. (%) No. (%) No. (%) No. (%)
Age, years
 65–69 203 (33.8) 314 (53.4) 232 (38.6) 263 (43.8) 231 (38.5) 1243 (41.6)
 70–74 205 (34.1) 171 (29.1) 225 (37.4) 219 (36.5) 217 (36.2) 1037 (34.7)
 75–79 193 (32.1) 103 (17.5) 144 (24.0) 118 (19.7) 152 (25.3) 710 (23.7)
Sex
 Male 298 (49.6) 278 (47.3) 269 (44.8) 292 (48.7) 267 (44.5) 1404 (47.0)
 Female 303 (50.4) 310 (52.7) 332 (55.2) 308 (51.3) 333 (55.5) 1586 (53.0)
Race/Ethnicity
 White, non-Hispanic 541 (90.0) 403 (68.5) 589 (98.0) 519 (86.5) 519 (86.5) 2571 (86.0)
 Black, non-Hispanic 25 (4.2) 150 (25.5) 2 (0.3) 36 (6.0) 5 (0.8) 218 (7.3)
 Asian 15 (2.5) 9 (1.5) 0 (0) 7 (1.2) 41 (6.8) 72 (2.4)
 Hispanic 8 (1.3) 10 (1.7) 8 (1.3) 29 (4.8) 28 (4.7) 83 (2.8)
 Other 12 (2.0) 16 (2.7) 2 (0.3) 9 (1.5) 7 (1.2) 46 (1.5)
Marital Status
 Married 381 (63.4) 324 (55.1) 405 (67.4) 383 (63.8) 379 (63.2) 1872 (62.6)
 Divorced 103 (17.1) 108 (18.4) 62 (10.3) 86 (14.3) 84 (14.0) 443 (14.8)
 Widowed 76 (12.6) 74 (12.6) 98 (16.3) 66 (11.0) 64 (10.7) 378 (12.6)
 Never married 21 (3.5) 41 (7.0) 15 (2.5) 23 (3.8) 32 (5.3) 132 (4.4)
 Other 19 (3.2) 38 (6.5) 20 (3.3) 28 (4.7) 30 (5.0) 135 (4.5)
 Unknown 1 (0.2) 3 (0.5) 1 (0.2) 14 (2.3) 11 (1.8) 30 (1.0)
Education
 Less than high school 5 (0.8) 15 (2.6) 26 (4.3) 14 (2.3) 2 (0.3) 62 (2.1)
 High school 42 (7.0) 73 (12.4) 107 (17.8) 30 (5.0) 22 (3.7) 274 (9.2)
 Some college /Associate’s degree 145 (24.1) 154 (26.2) 167 (27.8) 129 (21.5) 131 (21.8) 726 (24.3)
 Bachelor’s degree 152 (25.3) 126 (21.4) 121 (20.1) 146 (24.3) 153 (25.5) 698 (23.3)
 Advanced degree 257 (42.8) 219 (37.2) 178 (29.6) 275 (45.8) 292 (48.7) 1221 (40.8)
 Unknown 0 (0) 1 (0.2) 2 (0.3) 6 (1.0) 0 (0) 9 (0.3)
Household Income in the Previous Year
  ≤ $20,000 23 (3.8) 24 (4.1) 46 (7.7) 23 (3.8) 18 (3.0) 134 (4.5)
 $20,000–$49,999 142 (23.6) 131 (22.3) 184 (30.6) 103 (17.2) 81 (13.5) 641 (21.4)
 $50,000–$79,999 149 (24.8) 169 (28.7) 158 (26.3) 143 (23.8) 100 (16.7) 719 (24.0)
 $80,000–$99,999 89 (14.8) 77 (13.1) 78 (13.0) 95 (15.8) 92 (15.3) 431 (14.4)
  ≥ $100,000 177 (29.5) 175 (29.8) 109 (18.1) 217 (36.2) 281 (46.8) 959 (32.1)
 Unknown 21 (3.5) 12 (2.0) 26 (4.3) 19 (3.2) 28 (4.7) 106 (3.5)