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Psychometric properties of the Swedish version of the SNAP-IV rating scale parent form in a birth cohort of 11-year-old children

Tallberg, Pia LU ; Vahlström, Rebecka ; Martí Valls, Carla LU orcid ; Andersson, Mitchell LU orcid ; Bergman, Stefan LU ; Dahlgren, Jovanna and Roswall, Josefine (2025) In Nordic Journal of Psychiatry p.1-12
Abstract

OBJECTIVE: The primary aim of this study was to confirm the internal consistency and factor structure of the Swedish version of the Swanson-Nolan-Pelham scale fourth edition (SNAP-IV) for parents and to examine its clinical utility for identifying children diagnosed with attention deficit/hyperactivity disorder (ADHD).

MATERIALS AND METHODS: Parents of 11-year-old children from a birth cohort in the Halland region of Sweden (N = 981) completed the SNAP-IV assessment. Background data on ADHD diagnoses and medical treatment with stimulants were obtained from the Swedish National Patient Registry. We assessed the factor structure of the SNAP-IV using confirmatory factor analysis with diagonally weighted least squares estimation, and... (More)

OBJECTIVE: The primary aim of this study was to confirm the internal consistency and factor structure of the Swedish version of the Swanson-Nolan-Pelham scale fourth edition (SNAP-IV) for parents and to examine its clinical utility for identifying children diagnosed with attention deficit/hyperactivity disorder (ADHD).

MATERIALS AND METHODS: Parents of 11-year-old children from a birth cohort in the Halland region of Sweden (N = 981) completed the SNAP-IV assessment. Background data on ADHD diagnoses and medical treatment with stimulants were obtained from the Swedish National Patient Registry. We assessed the factor structure of the SNAP-IV using confirmatory factor analysis with diagonally weighted least squares estimation, and its clinical utility using logistic regression and receiver operating characteristic curve analysis.

RESULTS: A three-factor bifactor S-1 model of the Swedish SNAP-IV where all items load onto a general hyperactivity/impulsiveness factor and items specific to inattentiveness and Oppositional Defiant Disorder (ODD) load onto independent factors fit best and exhibited high internal consistency. Excluding ODD items, a similar two-factor bifactor S-1 model fit well. The SNAP-IV demonstrated robust clinical utility for identifying children diagnosed with ADHD as evidenced by significant associations between clinical diagnoses and the SNAP-IV subscales, as well as excellent classification accuracy for both the inattention and hyperactivity/impulsivity subscales when using continuous values. Taken together, the Swedish version of the SNAP-IV parent form was found to be a useful instrument with good criterion validity for assessing ADHD symptoms in 11-year-old children. The clinical application of cutoffs is discussed.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
epub
subject
in
Nordic Journal of Psychiatry
pages
1 - 12
publisher
Informa Healthcare
external identifiers
  • scopus:105011193052
  • pmid:40673732
ISSN
1502-4725
DOI
10.1080/08039488.2025.2531230
language
English
LU publication?
yes
id
b3971f1c-72e9-4679-8bc2-651c03e92936
date added to LUP
2025-07-21 16:09:38
date last changed
2025-10-25 04:12:21
@article{b3971f1c-72e9-4679-8bc2-651c03e92936,
  abstract     = {{<p>OBJECTIVE: The primary aim of this study was to confirm the internal consistency and factor structure of the Swedish version of the Swanson-Nolan-Pelham scale fourth edition (SNAP-IV) for parents and to examine its clinical utility for identifying children diagnosed with attention deficit/hyperactivity disorder (ADHD).</p><p>MATERIALS AND METHODS: Parents of 11-year-old children from a birth cohort in the Halland region of Sweden (N = 981) completed the SNAP-IV assessment. Background data on ADHD diagnoses and medical treatment with stimulants were obtained from the Swedish National Patient Registry. We assessed the factor structure of the SNAP-IV using confirmatory factor analysis with diagonally weighted least squares estimation, and its clinical utility using logistic regression and receiver operating characteristic curve analysis.</p><p>RESULTS: A three-factor bifactor S-1 model of the Swedish SNAP-IV where all items load onto a general hyperactivity/impulsiveness factor and items specific to inattentiveness and Oppositional Defiant Disorder (ODD) load onto independent factors fit best and exhibited high internal consistency. Excluding ODD items, a similar two-factor bifactor S-1 model fit well. The SNAP-IV demonstrated robust clinical utility for identifying children diagnosed with ADHD as evidenced by significant associations between clinical diagnoses and the SNAP-IV subscales, as well as excellent classification accuracy for both the inattention and hyperactivity/impulsivity subscales when using continuous values. Taken together, the Swedish version of the SNAP-IV parent form was found to be a useful instrument with good criterion validity for assessing ADHD symptoms in 11-year-old children. The clinical application of cutoffs is discussed.</p>}},
  author       = {{Tallberg, Pia and Vahlström, Rebecka and Martí Valls, Carla and Andersson, Mitchell and Bergman, Stefan and Dahlgren, Jovanna and Roswall, Josefine}},
  issn         = {{1502-4725}},
  language     = {{eng}},
  month        = {{07}},
  pages        = {{1--12}},
  publisher    = {{Informa Healthcare}},
  series       = {{Nordic Journal of Psychiatry}},
  title        = {{Psychometric properties of the Swedish version of the SNAP-IV rating scale parent form in a birth cohort of 11-year-old children}},
  url          = {{http://dx.doi.org/10.1080/08039488.2025.2531230}},
  doi          = {{10.1080/08039488.2025.2531230}},
  year         = {{2025}},
}