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. 2018 Sep 3;18:278. doi: 10.1186/s12888-018-1861-1

Table 3.

Psychometric properties and relative weights of program FIT components

Program component
Measure C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 Total score
Number of related items 4 5 4 1 1 3 4 4 3 4 33
Item relevance
within 1 year
M (SD)1 3.38 (1.21) 3.60 (1.18) 3.40 (1.03) 3.60 (1.17) 4.10 (0.57) 3.70 (0.99) 3.78 (1.00) 4.05 (0.99) 3.50 (0.73) 3.55 (0.90) 3.63 (1.03)
Min; Max2 1;5 1;5 2;5 2;5 3;5 2;5 2;5 2;5 2;5 2;5 1;5
Certainty about
this assessment
M (SD) 3.65 (0.89) 3.68 (0.91) 3.70 (0.95) 4.00 (0.47) 3.63 (1.27) 3.63 (1.27) 3.63 (1.00) 3.83 (1.13) 3.77 (0.63) 3.85 (1.21) 3.47 (0.97)
Min; Max 2;5 2;5 2;5 2;5 3;5 1;5 2;5 1;5 2;5 1;5 1;5
Item relevance
within 3 year
M (SD) 3.77 (1.06) 3.90 (0.86) 3.73 (0.99) 3.90 (0.88) 4.50 (0.53) 4.03 (0.93) 3.85 (1.00) 4.15 (0.92) 3.77 (0.57) 3.65 (0.86) 3.87 (0.92)
Min; Max 1;5 2;5 2;5 3;5 4;5 2;5 2;5 2;5 2;5 2;5 1;5
Certainty about
this assessment
M (SD) 3.63 (0.90) 3.62 (0.95) 3.63 (0.87) 3.60 (1.17) 3.80 (0.79) 3.50 (1.41) 3.50 (1.06) 3.65 (1.27) 3.60 (0.97) 3.55 (0.99) 3.59 (1.04)
Min; Max 2;5 2;5 1;5 1;5 2;5 1;5 1;5 1;5 1;5 1;5 1;5
Content validity ratio (CVR) 0.65 0.88 0.80 0.99 0.99 0.73 0.75 0.80 0.99 0.95 0.87
Cronbach’s alpha 0.84 0.82 0.81 n.a.3 n.a. 0.85 0.83 0.85 0.85 0.81 0.93
Relative weight of
each component (%)
11.21 16.03 12.20 2.99 4.73 10.63 12.10 6.35 10.87 12.89 100

Note: 1M mean, SD standard deviation, 2 Min; Max minimal and maximal value, 3n.a. not availabe