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

BMC Nursing

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

	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 score^b	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 consistency^c	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 validity^d	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 scores^e	1.2	5.3	0.6	0.6	1.2	0.6

^aMean(SD) of summed scores.
^bMissing according to half scale criterion.
^cPearson correlations between items and hypothesized scale, corrected overlap. Mean of correlations for each scale and range.
^dPercent correlations that are significantly lower/lower/higher/significantly higher with hypothesized scale compared to other scales.
^eCalculated according to the half-scale criterion

ISSN: 1472-6955