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Table 2 Summary of Multi-trait Scaling Analyses of the RAIN-instrument (N = 169)

From: Developing and evaluating an instrument to measure Recovery After INtensive care: the RAIN instrument

  Forward looking Supporting relations Existential ruminations Revaluation of life Physical and mental strength Need of social support
Number of items 4 4 4 3 3 2
Number of scale levels 16 16 16 12 12 8
Theoretical range 4-20 4-20 4-20 3-15 3-15 2-10
Observed range 4-20 4-20 4-20 3-15 3-15 2-10
Mean (SD)a 16.12 (3.8) 16.96 (3.6) 12.41 (3.7) 9.12 (3.8) 11.73 (2.9) 4.10 (2.5)
% incomplete scale scoreb 4.3 1.1 2.4 4.3 0.0 3.7
% at ceiling 19.6 32.3 2.5 5.7 15.2 5.1
% at floor 1.3 1.3 1.9 12.7 0.6 48.1
Mean (R) internal consistencyc 0.78 (.68-.89) 0.72 (.59-.80) 0.66 (.58-.71) 0.68 (.61-.72) 0.57 (.52-.64) 0.73 (.73-.73)
Item-scale discriminant validityd 0/0/0/100 0/0/10/90 0/0/0/100 0/0/0/100 0/0/13/87 0/0/0/ 100
Cronbach’s α 0.90 0.86 0.84 0.83 0.75 0.82
% calculated scale scorese 1.2 5.3 0.6 0.6 1.2 0.6
  1. aMean(SD) of summed scores.
  2. bMissing according to half scale criterion.
  3. cPearson correlations between items and hypothesized scale, corrected overlap. Mean of correlations for each scale and range.
  4. dPercent correlations that are significantly lower/lower/higher/significantly higher with hypothesized scale compared to other scales.
  5. eCalculated according to the half-scale criterion