Table 1.

Prevalence Estimates of NITS Among US Children Aged 6 to 19 Years by Sociodemographic Characteristics: NHANES III, 1988–1994 (N= 5249)

Reported
Characteristic
% NITS95% Confidence
Interval
Sex
 Male14.8(12.3–17.3)
 Female10.1(8.3–11.8)
Age group (years)
 6–118.5(6.9–10.0)
 12–1915.5(13.3–17.6)
Race-ethnicity
 Non-Hispanic white12.7(11.0–14.4)
 Non-Hispanic black10.7(8.7–12.6)
 Mexican American12.0(10.3–13.7)
PIR*
 Low12.6(9.2–16.0)
 Middle13.0(11.1–14.9)
 High10.4(7.4–13.4)
Urban status
 Metropolitan11.9(9.8–14.0)
 Nonmetropolitan13.0(11.3–14.6)
Geographic region
 Northeast8.7(5.4–11.9)
 Midwest12.3(9.9–14.7)
 South14.2(12.4–15.9)
 West13.3(10.6–15.9)
  • * PIR could not be calculated for 463 children with missing values for income.