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Table 5 Validity and reliability of SF-36 and SF-12 in classical test theory

From: Comparing the reliability and validity of the SF-36 and SF-12 in measuring quality of life among adolescents in China: a large sample cross-sectional study

  SF-36 SF-12 Difference (SF-36–SF-12)
Reliability Validity Reliability Validity Reliability Validity
Cronbach’s alpha CR Criterion validity AVE Cronbach’s alpha CR Criterion validity AVE Cronbach’s alpha CR Criterion validity AVE
PF 0.841 0.858 0.085 0.380 0.564 0.540 0.055 0.371 0.277 0.318 0.030 0.009
RP 0.727 0.728 0.173 0.405 0.605 0.602 0.171 0.432 0.122 0.126 0.002 − 0.027
BP 0.670 0.690 0.283 0.528 0.222 0.227 0.222 0.468 0.056 0.306
GH 0.766 0.781 0.670 0.420 0.134 0.134 0.647 0.286
VT 0.569 0.577 0.309 0.302 0.117 0.252 0.117 0.460 0.057 0.185
SF 0.211 0.329 0.113 0.146 0.112 0.027 0.112 0.217 0.086 0.034
RE 0.626 0.489 0.203 0.371 0.485 0.491 0.199 0.329 0.141 – 0.002 0.004 0.042
MH 0.625 0.426 0.243 0.316 0.396 0.360 0.049 0.303 0.229 0.066 0.194 0.013
PCS 0.562 0.935 0.350 0.430 0.422 0.719 0.589 0.392 0.14 0.216 − 0.239 0.038
MCS 0.609 0.418 0.476 0.299 0.429 0.690 0.300 0.399 0.18 –0.272 0.176 − 0.1
  1. Construct reliability = CR, average variance extracted = AVE = convergence validity