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Table 1 Scale effectiveness test

From: Quality of life and influencing factors of patients with rheumatoid arthritis in Northeast China

reliabilityInternal consistency reliabilityRetest reliabilityvalidity
αα
SF-360.690.72acceptable
WHOQOL-bref0.840.86fair
QLICD-RA0.420.69poor
structure validityKMOBartlett’s sphericity testcumulative contribution
SF-36 scale0.94P < 0.00180.23%
WHOQOL-bref0.95P < 0.00180.23%
QLICD-RA0.94P < 0.00170.24%
scale correlationSF-36WHOQOL-brefQLICD-RA
r Pr Pr P
SF-361 -0.84 <0.0010.92 <0.001
WHOQOL-bref 1 -0.87 <0.001
QLICD-RA  1 -
  1. *Reliability: Cronbach’s alpha; structure validity: Kaiser-Meyer-Olkin (KMO) statistic; Bartlett test of Sphericity; scale correlation: Pearson’s correlation coefficient