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. Author manuscript; available in PMC: 2020 May 1.
Published in final edited form as: Pediatr Obes. 2019 Jan 10;14(5):e12498. doi: 10.1111/ijpo.12498

Table 1.

Weighted basic characteristics of the study participants in the Add Health survey waves II – IV, stratified by race/ethnicity

European American (EA)
African American (AA)
Hispanic American (HA)
Wave II Wave III Wave IV Wave II Wave III Wave IV Wave II Wave III Wave IV

Age, mean [SD] 16.3 [0.1] 22.1 [0.1] 28.6 [0.1] 16.6 [0.2] 22.4 [0.2] 28.9 [0.2] 16.5 [0.2] 22.4 [0.2] 28.8 [0.2]
Sex (female), % 51.4 51.0 52.3 53.7 53.7 56.7 49.2 49.1 49.7
Household income, n (%)
 Low 20.9 20.1 20.4 57.3 55.5 55.8 52.8 53.6 52.9
 Middle 35.2 35.3 35.7 27.1 28.7 28.6 28.9 28.5 29.4
 High 43.9 44.5 43.8 15.4 15.6 15.3 18.3 18.0 17.7
 Missing 0.1 0.1 0.1 0.3 0.2 0.2 0.0 0.0 0.0
High education sample 11.7 13.5 13.7
Country of origin, n (%)
 Mexico 60.6 60.9 62.1
 Cuba 11.7 11.2 10.5
 Central and South America 06.1 06.3 06.3
 puerto Rico 11.1 11.6 10.6
 Other Hispanic 10.5 09.9 10.6
Foreign born status, n (%) 21.3 22.8 20.4
Smoking
 No smoking 59.9 58.7 61.3 81.6 78.1 72.5 68.8 75.3 76.0
 Smoking 39.5 41.1 38.6 18.0 21.4 26.5 30.3 24.2 23.7
 Missing 0.6 0.3 0.1 0.4 0.4 1.0 0.9 0.6 0.3
Alcohol consumption
 Don’t drink 51.2 19.3 21.6 66.9 44.2 41.4 50.5 29.2 30.7
 Less than once a week 36.7 44.4 43.6 23.0 37.4 36.6 36.7 47.3 42.8
 Once a week or more 11.7 35.0 34.4 08.8 17.0 20.6 11.8 21.7 26.3
 Missing 0.5 1.3 0.4 1.3 1.4 1.4 1.0 1.8 0.1
Marijuana use 17.1 25.4 18.4 15.6 20.2 15.7 19.2 18.4 14.3
Other drug use 5.6 8.5 4.3 1.4 2.5 1.6 5.0 5.9 2.9
Moderate-to-vigorous PA 67.7 19.5 20.7 61.6 17.5 18 63.6 22.7 21.3
Screen time (> 14 h) 51.9 63.0 61.2 65.3 66.1 60.1 58.4 60.2 59
Overeating 6.8 6.8 6.7 7.8 7.1 7.5 8.1 8.4 8.5
Depressive feelings, n (%) 7.5 5.0 6.4 11.6 6.7 10.1 11.4 8.8 6.2
ADHD subtype, n (%)
 Non-ADHD 90.6 90.7 90.7 94.1 94.2 94.4 93.2 92.9 93.4
 ADHD-HI 3.7 3.5 3.3 2.3 2.3 0.5 0.9 0.0 0.8
 ADHD-I 2.9 2.8 2.9 2.0 2.1 1.7 3.1 3.1 3.3
 ADHD-C 2.8 3.0 3.0 1.6 1.4 1.5 1.7 2.0 1.5
Body mass index, mean [SD] 22.8 [0.2] 26.0 [0.1] 28.5 [0.2] 24.3 [0.2] 27.4 [0.2] 30.9 [0.3] 23.6 [0.2] 27.0 [0.2] 29.7 [0.3]
 Non-ADHD, mean [SD] 22.7 [0.2] 25.9 [0.1] 28.4 [0.2] 24.3 [0.2] 27.4 [0.2] 30.8 [0.3] 23.4 [0.2] 26.8 [0.2] 29.6 [0.3]
 ADHD-HI, mean [SD] 23.1 [0.4] 26.4 [0.5] 29.5 [0.8] 23.4 [0.8] 27.1 [0.9] 31.5 [1.0] 25.0 [1.5] 28.0 [1.2] 32.8 [1.5]
 ADHD-I, mean [SD] 23.8 [0.5] 26.9 [0.5] 30.1 [0.7] 25.8 [1.5] 28.5 [1.5] 29.7 [1.9] 25.6 [1.0] 27.3 [1.2] 30.9 [1.4]
 ADHD-C, mean [SD] 23.1 [0.5] 26.5 [0.6] 29.1 [0.7] 22.8 [0.7] 26.6 [1.1] 32.1 [1.8] 26.9 [1.3] 30.5 [1.9] 30.4 [1.7]

ADHD: attention-deficit/hyperactivity disorder; ADHD-HI: the ADHD predominantly hyperactive/impulsive subtype; ADHD-I: the ADHD predominantly inattentive subtype; ADHD-C: ADHD combined, a combination of ADHD-HI and ADHD-I symptoms; PA: physical activity