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Table 2 Psychometric properties of the CSI scale

From: Development and psychometric testing of a scale assessing the sharing of medical information and interprofessional communication: the CSI scale

  SH CM CNM CM + CNM Global
Item properties      
# of items in the scale 5 4 4 8 13
% of questionnaires with at least ½ the items completed 99.6% 97.6% 98.1% 97.9% 98.1%
# of questionnaires with ½ + 1 items completed 530 510 513 523 524
# of items with “missing data” > 20% 0 0 0 0 0
# of items with “does not apply” response > 20% 0 0 0 0 0
# of item with ceiling effect > 50% 0 0 4 4 4
# of item with floor effect > 50% 0 0 0 0 0
Scaling properties      
Mean score (±SD) 49.3 (17.9) 69.3 (23.1) 86.9 (15.5) 78.1 (15.8) -
Skewness value/SE 0.25/0.78 -0.59/0.78 -1.01/0.78 -0.38/0.78 -
Median 46.2 66.1 91.5 78.7 -
Ceiling effect (%) 0.9% 15.7% 47.7% 13.9% -
Floor effect (%) 0% 1.2% 0% 0% -
# of item correlation with own scale > 0.40 5 4 4 - -
# of item correlation with own scale greater than with other scale 5 4 4 - -
Cronbach’s α coefficient 0.80 0.87 0.81 0.83 -
Sum of square of the factors before rotation 31.6% 18.6% 13.5% - 63.7%
% of variance explained by the factor 22.4% 21.7% 19.6% - 63.7%
Test of unidimensionality      
1st eigenvalue 2.81 3.01 2.64 3.52 -
2nd eigenvalue 0.78 0.43 0.76 1.83 -
Dillon-Goldstein’s Rho 0.87 0.92 0.88 0.88 -