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Table 3 CFA of the WFIRS-P: item-to-factor loadings and fit statistics for one- and six-factor models

From: Psychometric validation of the Weiss Functional Impairment Rating Scale-Parent Report Form in children and adolescents with attention-deficit/hyperactivity disorder

 

Six-factor model

One-factor model

 

Baseline

Follow-up

Baseline

Follow-up

 

Sample 1

Sample 2

Sample 1

Sample 2

Sample 1

Sample 2

Sample 1

Sample 2

Range of factor loadings

Family domain

0.671–0.868

0.612–0.881

0.676–0.896

0.655–0.892

0.611–0.814

0.552–0.818

0.616–0.839

0.595–0.837

Learning and School domain

0.485–0.911

0.449–0.890

0.585–0.900

0.621–0.927

0.347–0.718

0.326–0.713

0.470–0.733

0.512–0.773

Life Skills domain

0.277–0.722

0.268–0.721

0.372–0.730

0.338–0.754

0.199–0.549

0.182–0.492

0.299–0.583

0.272–0.609

Child’s Self-Concept domain

0.789–0.895

0.802–0.862

0.820–0.915

0.859–0.901

0.553–0.623

0.527–0.578

0.589–0.665

0.677–0.735

Social Activities domain

0.428–0.893

0.461–0.878

0.553–0.907

0.577–0.888

0.365–0.788

0.389–0.768

0.473–0.805

0.491–0.790

Risky Activities domain

0.287–0.808

0.289–0.790

0.356–0.858

0.929–0.818

0.200–0.670

0.206–0.623

0.284–0.714

0.930–0.672

Fit statistics

CFI

0.789

0.818

0.861

0.880

0.545

0.579

0.665

0.710

RMSEA

0.094

0.092

0.084

0.085

0.141

0.141

0.134

0.133

TLI

0.929

0.922

0.951

0.954

0.840

0.817

0.875

0.888

Chi-Square

3099.9*

2730.8*

1544.1*

1534.1*

6360.1*

5997.1*

3415.9*

3411.8

df

270

253

206

195

259

248

196

192

  1. CFAconfirmatory factor analysis, CFIcomparative fit index, df degrees of freedom, RMSEA root mean square error of approximation, TLI, Tucker Lewis Index, WFIRS-P Weiss Functional Impairment Rating Scale-Parent Report Form
  2. *p < 0.001