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Table 3 Mean item-total correlation and Cronbach's alpha for domain scores in the NFAS-4 and the NFAS-5 (N = 3325)

From: A randomised comparison of a four- and a five-point scale version of the Norwegian Function Assessment Scale

  Mean item-total correlation Cronbach's alphaa
  NFAS-4 NFAS-5 NFAS-4 NFAS-5
Walking/standing 0.74 0.79 0.91 0.93***
Holding/picking 0.55 0.65 0.82 0.88***
Lifting/carrying 0.70 0.77 0.89 0.92***
Sitting 0.53 0.60 0.66 0.74***
Managing 0.66 0.72 0.87 0.91***
Cooperation/communication 0.60 0.66 0.81 0.85***
Senses 0.27 0.53 0.69 0.69
Total scores 0.62 0.70 0.95 0.96**
  1. a Cronbach's alpha values for NFAS-4 and NFAS-5 are compared, * p < 0.05; ** p < 0.01; *** p < 0.001