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. Author manuscript; available in PMC: 2014 Sep 2.
Published in final edited form as: Arch Gen Psychiatry. 2008 Jun;65(6):702–712. doi: 10.1001/archpsyc.65.6.702

Table 1.

Frequency distribution of baseline characteristics as observed at the time of follow-up during late childhood and early adolescence (LCEA; n=1392) and young adulthood (YA; n=1920). Data are from an epidemiologic sample originally recruited at the time of entry into first grade classrooms in 1985-1986 from an urban mid-Atlantic public school system (n=2311).

Characteristics at baseline (1990)1 Late Childhood and Early Adolescent Follow-up n (%) Young Adult Follow-up n (%)

Age (years):
    9 404 (29.0) 603 (31.4)
    10 641 (46.0) 889 (46.3)
    11 312 (22.4) 388 (20.2)
    12 33 (2.4) 37 (1.9)
    13 2 (0.1) 3 (0.2)

Sex: Female 671 (48.2) 968 (50.4)
    Male 721 (51.8) 952 (49.6)

Race-ethnicity2:
    African-American 1010 (72.6) 1317 (68.6)
    Other 382 (27.4) 603 (31.4)

Peer alcohol use:
    Yes 201 (14.4) 222 (11.6)
    No 802 (57.6) 937 (48.8)
    missing3 389 (28.0) 761 (39.6)

Caregiver history of heavy drinking and/or illegal drug use:
    Yes 563 (40.5) 767 (39.9)
    No 524 (37.6) 760 (39.6)
    missing3 305 (21.9) 393 (20.5)

Neighborhood disadvantage (tertiles):
    Low 353 (25.4) 407 (21.2)
    Middle 334 (24.0) 383 (19.9)
    High 304 (21.8) 353 (18.4)
    missing3 401 (28.8) 777 (40.5)

Subsidized lunch4:
    Yes 805 (57.8) 1046 (54.5)
    No 586 (42.1) 870 (45.3)
    missing5 1 (0.1) 4 (0.2)

Conduct problems6:
    Low 581 (41.7) 726 (37.8)
    High 686 (49.3) 753 (39.2)
    missing3 125 (9.0) 441 (23.0)
1

Information on all the characteristics listed was gathered at the baseline interview for these analyses (1990), except for subsidized lunch which was gathered from school records in first grade (1985-86), conduct problems which were assessed in1991, and household history of heavy drinking and/or illegal drug use assessed in young adulthood.

2

A total of 94.5% (n=361) and 96.0% (n=579) of the Other race-ethnicity group is White in the assessments during the LCEA and YA follow-ups, respectively.

3

These individuals did not provide this information during the LCEA or YA follow-up.

4

This variable indicates receipt of free or subsidized lunch in first grade.

5

This information was not available from school records for these individuals.

6

The categories represent above and below the median of the scale score for this sample.