Fourth National Incidence Study of Child Abuse and Neglect (NISâ4)

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Table A–11. Unduplication Results for CPS Summary Data FormsCPS maltreatment and CPS summary form true duplicates 1,520Sentinel and CPS summary form true duplicate 1,534Total Number of true duplicates 3,054Unifying duplicates. In order to resolve records classified as true duplicates,analysts selected one record to represent the child in the final database and “credited” the child’srecognition to a particular source, while statisticians assigned the record a unified weight.Selecting a single record to represent an unduplicated child followed similar decisionrules to those used in previous NIS cycles, giving preference to records with countablemaltreatment under the Harm and/or Endangerment standards, to those with more completedemographic information, to records from sources higher in the traditional NIS hierarchy ofrecognition sources, and to those describing more forms of maltreatment. Statisticians assignedthe unified child record a weight that adjusted for the multiple probabilities of sampling the childfrom the sources represented in the duplicate grouping.The NIS–4 unduplication team processed 30,543 child records. After identifying andunifying duplicate records, the final database contained 29,488 records on individual children.Improved methodology. The NIS–4 unduplication process mimicked methods usedin prior NIS cycles, but also introduced innovations to identify potential duplicate pairs anddetermine duplicates more efficiently. Substantive differences from earlier NIS cycles includedusing probability-based matching software both to identify candidate pairs and decide trueduplicate status of CPS Summary data records, and adjusting the rules of the NIS–3 algorithm.These improvements were tested to verify their comparability with previous NIS studies.Extended CPS unduplication. As an enhancement to earlier NIS methods, theNIS–4 collected CPS Summary forms for an additional month after the study reference period.Statisticans, using the probability-based matching software, unduplicated the uninvestigatedSentinel cases against this added month of CPS data to identify any additional duplicates. Thisspecial analysis ensured that the study would not underestimate the percentage of countablechildren investigated by CPS.A-25
WEIGHTING Sampling weights were developed so the NIS–4 data can provide national estimatesof the incidence of child abuse and neglect in the U.S. in 2005-2006. The weights:• account for the differential selection probabilities for the sample units at eachsuccessive sampling stage,• compensate for unit nonresponse from sentinel agencies, and for incomplete orpartial response from sentinels and CPS agencies,• adjust for multiple probabilities of identifying the same maltreated childthrough multiple reports to CPS or through multiple sentinel sources, and• provide an annualization adjustment to transform reference-period data torepresent a full-year and account for seasonality differences between the twostudy reference periods (fall 2005, spring 2006).Base weights. For each sample unit, the base weight is the reciprocal of theprobability of including the unit in the sample. In the NIS–4, the first-stage primary samplingunits (counties or county clusters) were selected with probability proportional to the Census 2000population of children under age 18 in the PSU. The PSU base weight is the reciprocal of theprobability of selection of the PSU. Within PSUs, the agency weight is a function of the sampledesign used to select agencies in the PSU. The agency base weight is a product of the PSUweight and the reciprocal of the conditional selection probability of the agency given the samplePSU. Likewise, the base weight for sentinels, maltreatment case reports and children are derivedin the same manner, taking into consideration the sample design used to select the sample unitsin each successive sampling stage.Special weighting adjustments. There were two adjustments to the PSU baseweight. First, the PSU sample was divided into two subsamples. A subsample of 62 PSUs (69counties) was selected for a full-scale survey involving all 11 sentinel agency categories in theNIS–4. The remainder sample of 48 PSUs (53 counties) was allocated for a reduced-load surveyto include 8 sentinel agency categories only and exclude the three law enforcement agencytypes—juvenile probation, sheriff/county police, and municipal police. As a result, a PSUsubsample weight was computed for estimation involving law enforcement agencies.A-26
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Fourth National Incidence Studyof C
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Fourth National Incidence Studyof C
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TABLE OF CONTENTSChapterPageEXECUTI
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ChapterPage5.1.2 Differences in Mal
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LIST OF TABLESTablePage2-1 NIS-4 60
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LIST OF FIGURESFigurePage2-1 Levels
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Figure5-265-275-286-16-26-36-46-56-
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EXECUTIVE SUMMARYThis executive sum
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In the NIS classifications, maltrea
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3. The National Incidence of Child
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(36%, or 302,600 children) were emo
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maltreatment outcomes—rates of ch
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details that would exclude legitima
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Grandparents as caregivers. The NIS
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males more often were abusers (62%
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maltreated children to enter CPS in
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with Harm Standard maltreatment and
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differences in maltreatment rates r
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1. INTRODUCTIONThis report presents
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Incorporating the TAG input, DHHS d
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• The NIS-4 Data Collection Repor
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these with the percentages that rec
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Rationale. Although CPS investigate
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eveal the maltreatment to persons i
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Figure 2-3.Schematic Summary of the
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CPS recruitment. In order to undupl
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format: the Sentinel data form desc
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3. Purposive and Avoidable Acts/Omi
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each child substantiated by CPS or
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2.6 Weighting and Estimation 14The
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the population. The estimated total
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2.8 Supplementary StudiesThe NIS pr
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3. INCIDENCE OF CHILD ABUSE AND NEG
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3.1.1 Overall Incidence of Harm Sta
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3.1.2 Incidence of Harm Standard Ab
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children represent 58% of all child
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From inadequate supervision to the
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3.1.5 Severity of Outcomes from Har
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interpreted as less serious than mo
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considered to be endangered by thei
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totals represent national incidence
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Changes since 1986 in the incidence
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The NIS-3 found significant increas
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Moderate harm. Moderate harm due to
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4. DISTRIBUTION OF ABUSE AND NEGLEC
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Sexual Abuse. Girls experienced Har
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Table 4-2. Sex Differences in Incid
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4.2 Age Differences in the Incidenc
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Figure 4-4.Age Differences in Incid
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graph shows, the incidence rate for
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4.2.2 Age Differences in Endangerme
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Physical abuse. The incidence of En
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Figure 4-11.Age Differences in the
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Figure 4-12.Percent Changes since t
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Endangered. Chapter 3 reported that
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significantly higher than that for
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Changes since the NIS-3 in Rates of
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Overall Endangerment Standard Maltr
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Changes since the NIS-3 in Rates of
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4.4.1 Differences in Harm Standard
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Table 4-6. Differences Related to C
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Thus, the incidence rate for childr
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Overall Harm Standard MaltreatmentS
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Table 4-8. Differences Related to C
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Endangerment Standard maltreatment,
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5.1 Differences in the Incidence of
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more than 2 times the rate for chil
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inferring that they were harmed. Th
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Specific Categories of Endangerment
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Endangered. The estimated incidence
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families. The incidence rate for ch
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Educational neglect. Children in fa
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The incidence rate of Endangerment
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Endangered. Children in families of
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Figure 5-1.Incidence of Harm Standa
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Figure 5-2.Incidence of Harm Standa
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higher, the rate for children whose
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maltreatment at a reliably higher r
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Figure 5-6.Percent Changes since NI
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5.3.2 Differences in the Incidence
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Specific Categories of Endangerment
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Figure 5-11.Incidence of Endangerme
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living with a single parent who had
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oth parents showed much smaller cha
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child’s primary caregiver, when t
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Table 5-6. Differences in Incidence
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in households with two children), a
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per 1,000). Also, the rate of moder
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two children, 1.7 times the rate fo
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Emotional abuse. The incidence of E
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Endangered. The estimated incidence
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Figure 5-23.Incidence of Harm Stand
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5.6.2 Differences in Endangerment S
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were 1.5 times more likely to be ph
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Moderate harm. Children residing in
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Second, because multiple persons so
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hierarchy comprises other adults kn
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Table 6-2 also reveals a marked dif
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with the fact that mothers tend to
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Table 6-4. Perpetrator's Sex by Sev
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perpetrator relationship, with the
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earlier (Chapter 4) and did not var
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perpetrator’s alcohol use was a f
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More of the moderately harmed child
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7. RECOGNIZING ABUSED AND NEGLECTED
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classification hierarchy. If more t
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neglected. That is, when school sen
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NIS-4 estimates and rates per 1,000
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largest contributor in this sector,
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schools and social services agencie
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maltreatment situations only to CPS
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that influence sentinels’ respons
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8.1 CPS Investigation of Abused and
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Figure 8-1.Changes in Rates of CPS
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Figure 8-2.CPS Investigation of Mal
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CPS investigated more than one-half
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Figure 8-6. CPS Investigation of Ch
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children recognized at shelters, al
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Figure 8-8.Changes in Rates of CPS
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Just as in the Harm Standard, the i
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Figure 8-11.Changes in Investigatio
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Figure 8-13.CPS Investigation of Ch
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maltreated children. With these chi
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during the extra month but were alr
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Figure 8-15.Uninvestigated Maltreat
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columns, providing the presumptive
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Page 260 and 261: Table 8-2 shows the actual and pres
Page 262 and 263: 8.4 Relationship between CPS Invest
Page 264 and 265: investigation rates were lower for
Page 266 and 267: Prioritizing recommended responses
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Page 270 and 271: columns, the educational neglect pe
Page 273 and 274: 9. CONCLUSIONS AND IMPLICATIONSThe
Page 275 and 276: sliding scales for the poorer child
Page 277 and 278: REFERENCESAhlbom, A., & Norell, S.
Page 279 and 280: Youth and Families, Administration
Page 281 and 282: U.S. Census Bureau. (2004). Current
Page 283 and 284: Appendix A Design and Methods Summa
Page 285 and 286: weighted the records (so the sample
Page 287 and 288: design. The measure of size was the
Page 289 and 290: optimal sample sizes from law enfor
Page 291 and 292: CPS RECRUITMENT In order to develop
Page 293 and 294: SENTINEL AGENCY RECRUITMENT The sen
Page 295 and 296: Table A-2.NIS-4 Agency Participatio
Page 297 and 298: DATA COLLECTIONThe goals of the NIS
Page 299 and 300: Table A-5. Participating Sentinel A
Page 301 and 302: • The nature of harm (injuries to
Page 303 and 304: The evaluative coders recorded thes
Page 305 and 306: Table A-9. Agreement Rates for Over
Page 307: probability-based matching software
Page 311 and 312: eport the child to CPS, which in tu
Page 313 and 314: Table A-12. Topics Covered in the 4
Page 315 and 316: CPS SCREENING POLICIES STUDY (SPS)
Page 317 and 318: • 52 agencies provided their own
Page 319 and 320: SENTINEL DEFINITIONS SURVEY (SDS) T
Page 321 and 322: The first surveys were mailed in Ma
Page 323 and 324: TABLE B-1.CATEGORIES OF MALTREATMEN
Page 325 and 326: TABLE B-4.AGE BY CATEGORIES OF MALT
Page 327 and 328: TABLE B-4. (Continued)AGE CLASS = 1
Page 329 and 330: TABLE B-5. (Continued)RACE/ETHNICIT
Page 331 and 332: TABLE B-6. (Continued) NCHILDR = 4
Page 333 and 334: TABLE B-8.CHILDREN COUNTABLE UNDER
Page 335 and 336: TABLE B-8. (Continued)CLASS = NOT I
Page 337 and 338: TABLE B-10.FAMILY STRUCTURE AND PAR
Page 339 and 340: TABLE B-10. (Continued)FAMILY STRUC
Page 341 and 342: TABLE B-11. (Continued)FAMILY STRUC
Page 343 and 344: TABLE B-13. (Continued)PARENTS' EMP
Page 345 and 346: Appendix C Endangerment Standard Es
Page 347 and 348: TABLE C-3.SEX BY CATEGORIES OF MALT
Page 349 and 350: TABLE C-4. (Continued)AGE CLASS = 6
Page 351 and 352: TABLE C-5.RACE/ETHNICITY BY CATEGOR
Page 353 and 354: TABLE C-6. (Continued)NCHILDR = 2 C
Page 355 and 356: TABLE C-7. (Continued)METROSTATUS =
Page 357 and 358: TABLE C-8. (Continued)CLASS = INVES
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TABLE C-9.PROPORTION OF ENDANGERMEN
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TABLE C-10. (Continued)FAMILY STRUC
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TABLE C-11.FAMILY STRUCTURE BY CATE
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TABLE C-12. (Continued)SOCIOECONOMI
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TABLE C-14.GRANDPARENTS AS CAREGIVE
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APPENDIX DWITHIN STUDY ANALYSES Thi
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Table D-3. T-statistics for age dif
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Table D-3. ContinuedAge 6-8 vs 9-11
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Table D-4. ContinuedAge 0-2 vs 12-1
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Table D-4 ContinuedAge 9-11 vs 12-1
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Table D-6. T-statistics for racial/
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Table D-8. T-statistics for parent'
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Table D-11. T-statistics for family
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Table D-11. ContinuedUnmarried Pare
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Table D-12. ContinuedMarried Parent
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Table D-12. ContinuedSingle ParentW
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Table D-17. T-statistics for metros
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Table D-19. Chi-squared Results for
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APPENDIX E BETWEEN-STUDY ANALYSES T
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Table E-1a. T-statistics for compar
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Table E-3. Chi-squared tables for s
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Table E-3. (Continued)Emotional Neg
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Table E-4. (Continued)Sexual Abuse0
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Table E-4. (Continued)Severity, Mod
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Table E-5. (Continued)Physical Negl
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Table E-6. Chi-squared tables for p
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Table E-6. (Continued)Educational N
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Table E-7. Chi-squared tables for f
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Table E-7. (Continued)Emotional Neg
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Table E-8. (Continued)Sexual AbuseL
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Table E-8. (Continued)Severity, Mod
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Table E-9. (Continued)Emotional Abu
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Table E.9. (Continued)Severity, Inf
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Table E-10. (Continued)Emotional Ab
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Table E-10. (Continued)Severity, In
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Table E-17. T-statistics for Source
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Fourth National Incidence Study of Child Abuse and Neglect (NISâ4)