Psychometric properties of the Swedish version of the SNAP-IV rating scale parent form in a birth cohort of 11-year-old children
(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.
(Less)
- author
- Tallberg, Pia
LU
; Vahlström, Rebecka
; Martí Valls, Carla
LU
; Andersson, Mitchell LU
; Bergman, Stefan LU ; Dahlgren, Jovanna and Roswall, Josefine
- organization
- publishing date
- 2025-07-17
- type
- Contribution to journal
- publication status
- epub
- subject
- in
- Nordic Journal of Psychiatry
- pages
- 1 - 12
- publisher
- Informa Healthcare
- external identifiers
-
- 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
- 2025-07-22 08:56:53
@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}}, }