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Table 6 Goodness of fit, including the comparison of domains based on the original (26-items), and adapted (21-items) IPA questionnaire

From: Validity and reliability of the (adjusted) Impact on Participation and Autonomy questionnaire for social-support populations

  4-domain IPA
Autonomy indoors Family role Autonomy outdoors Social life and relations
original ex 1a,6b original ex 2c original covariance 1c & 1d original ex 5b, 5e
# items 7 5 7 6 5 5 7 5
n= 3922 3938 3711 3718 3715 3715 3846 3881
CFI .711 .987 .953 .973 .941 .985 .842 .961
TLI .567 .973 .930 .955 .881 .963 .764 .923
SRMR .110 .021 .036 .026 .044 .022 .079 .034
Item-test correlation .78–.87 .75–.85 .51–.88 .54–.86 .76–.81   .68–.81 .71–.81
Item-rest correlation .68–81 .57–.77 .35–.83 .36–.78 .63–.68   .52–.72 .53–.68
Average inter-item covariance 0.59 0.52 0.87 0.80 0.81   0.47 0.48
Cronbach’s alpha 0.91 0.87 0.9 0.876 0.852   0.862 0.808
Mean score 3.83 3.86 3.14 3.19 3.05   3.5 3.45
SD 0.79 0.78 0.98 0.96 0.98   0.74 0.77
Pairwise correlation between domains 0.99 0.99 1.00 0.98
  1. Source: IPA-MO database, 2014–2016