APPENDIX. Continued

Variable DefinitionNHIS Variable Name (Code*)Estimated Population
Perceived disability
Respondent believes child had disabilityRPPERDIS  (1)1 724 343
Respondent thinks others believe child has disabilityOTPERDIS  (1)1 518 406
Unable/limited in school attendance,
or needs special school
LASCH  (1,3,4)1 130 288
Unable to perform or limited in activities LA  (1,2,3)4 743 842
Preschool developmental delay indicators
Shows interest in thingsINTERST2 (2), INTERST3  (2)13 276
Shows wants by pointing, etcPOINTS3 (2), POINTS4  (2)61 475
Responds to people by sounds, faces, wordsRESPOND3 (2), RESPONDS4  (2)23 801
Pays attention for one minuteATTN4 (2), ATTN5  (2)93 985
Shows needs/wants by actions/wordsWORDS4 (2), WORDS5  (2)82 802
Talks in phrases or sentencesPHRASES5  (2)214 317
Uses words to show what likes/dislikesLIKES5  (2)60 677
Plays make believeMKBELV5  (2)230 523
Uses actions to show what likes/dislikesACTIONS5  (2)5273
Plays with another personPLAY5  (2)106 607
Happy/pleased when sees favorite peopleHAPPY2 (2), HAPPY3 (2), HAPPY4 (2), HAPPY5  (2)43 390
Holds head upright without supportHLDHEAD2  (2)15 673
Sits upright without supportSITS3 (2), SITS4 (2), SITS5  (2)53 733
Ever crawled or creptCRAWLED3 (2), CRAWLED4 (2), CRAWLED5  (2)74 238
Walks without holding onto anythingWALKS4 (2), WALKS5  (2)64 792
Walks rapidly or runsRUNS5  (2)82 278
  • * Code refers to NHIS codes used as inclusion criteria.

  • From the core NHIS questionnaire; all other items from the Disability Supplement.

  • Extensions: 2 = 4–8 months, 3 = 9–15 months, 4 = 16–29 months, 5 = 30–59 months; negative responses used to identify presumed special health care needs.

    Source: Authors' tabulations of the 1994 National Health Interview Survey on Disability.

    Note: Estimates are not mutually exclusive or additive.