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Table 1 Demographic characteristics of the CARDIA sample at Year 0 and the analytic sample at year 0 and year 15

From: Reproducibility of physical activity recall over fifteen years: longitudinal evidence from the CARDIA study

  CARDIA sample Analytic sample
  At Year 0 At Year 0 At Year 15
1985-1986 1985-1986 2000-2001
Sample Size 5045 3565 3565
Sex    
  Male 2293 (45.5%) 1573 (44.1%)
  Female 2752 (54.5%) 1992 (55.9%)
Race    
  White 2454 (48.6%) 1893 (53.1%)
  Black 2591 (51.4%) 1672 (46.9%)
Age at Year 0    
  18-24 years 2266 (44.9%) 1495 (41.9%)
  25-30 years 2779 (55.1%) 2070 (58.1%)
Education    
  High School or Less 1989 (39.4%) 1262 (35.4%) 815 (23.0%)
  Some College 1677 (33.2%) 1194 (33.5%) 1107 (31.1%)
  College Graduate 1379 (27.3%) 1109 (31.1%) 1639 (45.9%)
  Missing    4
Body Mass Index    
  Normal weight (<25 kg/m2) 3297 (65.3%) 2328 (65.3%) 1198 (33.6%)
  Overweight (25–29 kg/m2) 1158 (23.0%) 827 (23.2%) 1165 (32.7%)
  Obese (≥30 kg/m2) 590 (11.7%) 410 (11.5%) 1202 (33.7%)
Physical Activity Score a,b    
  Black Males 474 (272, 726) 444 (251, 708) 356 (176, 622)
  Black Females 228 (103, 396) 220 (100, 388) 173 (70, 327)
  White Males 461 (288, 672) 468 (290, 684) 372 (208, 570)
  White Females 351 (208, 543) 364 (214, 548) 278 (137, 454)
  1. a CARDIA Physical Activity Score = sum (for moderate/vigorous/total) MET level × months of infrequent activity plus 3 × months of frequent activity.
  2. b Data are median (25th, 75th percentiles).