Table 3.

Baseline Distribution of Adolescents Reporting Sleep Problems in 1989 and Proportion With Sleep Problems or Frequent Sleep Problems in 1993

Baseline DemographicsnFollow-Up
Sleep Problems %
(95% Confidence Interval)
Frequent Sleep Problems %
(95% Confidence Interval)
Overall309451.6 ± 2.021.1 ± 1.5
Sex
 Male140647.1 ± 2.819.8 ± 2.1
 Female168855.3 ± 2.522.1 ± 2.1
Age group (y)
 12–14133250.5 ± 2.920.0 ± 2.4
 15–1691351.8 ± 3.321.4 ± 2.8
 17–1884953.1 ± 3.522.3 ± 2.9
Race/ethnicity
 White231251.7 ± 2.221.1 ± 1.7
 Black43147.4 ± 5.516.4 ± 3.5
 Hispanic24454.8 ± 6.924.4 ± 5.4
 Asian/other10759.9 ± 10.231.4 ± 8.4
Perceived school performance
 Much better42849.3 ± 5.415.6 ± 3.5
 Better107352.7 ± 3.220.8 ± 2.5
 Average/below159351.6 ± 2.622.8 ± 2.2