12.07.2015 Views

Fourth National Incidence Study of Child Abuse and Neglect (NIS–4)

Fourth National Incidence Study of Child Abuse and Neglect (NIS–4)

Fourth National Incidence Study of Child Abuse and Neglect (NIS–4)

SHOW MORE
SHOW LESS
  • No tags were found...

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

4.2 Age Differences in the <strong>Incidence</strong> <strong>of</strong> MaltreatmentTo examine differences in the incidence <strong>of</strong> maltreatment related to age,analyses classified children into six groups based on their age at the time <strong>of</strong> theircountable maltreatment: 0 to 2 years, 3 to 5 years, 6 to 8 years, 9 to 11 years, 12 to 14years, <strong>and</strong> 15 to 17 years. 404.2.1 Age Differences in Harm St<strong>and</strong>ard MaltreatmentSignificant age differences emerged in the incidence <strong>of</strong> overall HarmSt<strong>and</strong>ard maltreatment, <strong>and</strong> in several categories <strong>of</strong> Harm St<strong>and</strong>ard abuse <strong>and</strong> neglect. 41Overall Harm St<strong>and</strong>ard Maltreatment, <strong>Abuse</strong>, <strong>and</strong> <strong>Neglect</strong>Figure 4–3 shows that the youngest children (ages 0 to 2 years) experiencedHarm St<strong>and</strong>ard maltreatment at a significantly lower rate than children ages 6 or older(8.5 per 1,000 vs. 17.6 per 1,000 or higher). Only the 9- to 11-year-old children do notdiffer from the youngest group, primarily because their estimated rate is less precise thanthe rates for other older children. 42 No other age differences in the graph <strong>of</strong> overall HarmSt<strong>and</strong>ard maltreatment are statistically significant.40 Computation <strong>of</strong> incidence rates used the following population denominators, reflecting the number (inthous<strong>and</strong>s) <strong>of</strong> children in the general population: 12,292 children 0 to 2 years old, 12,069 children 3 to 5years old, 11,682 children 6 to 8 years old, 12,067 children 9 to 11 years old, 12,643 children 12 to 14years old, <strong>and</strong> 12,772 children 15 to 17 years old (U.S. Census Bureau, 2008f).41 In each category <strong>of</strong> maltreatment or injury, decisions about the significance <strong>of</strong> differences relied on theBonferroni critical values for t. This adjusted for the multiplicity <strong>of</strong> the comparisons involved. AppendixD gives details concerning the statistical tests for the significance <strong>of</strong> age group differences.42 That is, the sampling error associated with their rate is much larger, which may be a r<strong>and</strong>om result <strong>of</strong> theway they came into the NIS–4 sample; their rate varies across the different components <strong>of</strong> the NIS–4sample more than the rates <strong>of</strong> the other older groups.4-7

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!