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Table 2 Comparison of TAS-20 total score and subscales scores between the adult prisoners and the adult norm of 2003 and 2007

From: Prevalence and associated factors of alexithymia among adult prisoners in China: a cross-sectional study

  DIF DDF EOT TAS-20 TOTAL
Samples of adult prisoners (N = 1705) 19.95 ± 5.03 14.59 ± 2.87 21.93 ± 3.34 56.47 ± 8.61
The adult norm of 2003a (N = 416) 17.33 ± 4.70 13.44 ± 3.29 18.91 ± 4.01 49.68 ± 9.24
t c   21.52*** 16.56*** 37.36*** 32.60***
The adult norm of 2007b (N = 870) 16.26 ± 4.75 13.26 ± 3.51 19.12 ± 3.86 48.65 ± 9.24
t d 30.31*** 19.15*** 34.77*** 37.54***  
  1. aFor the data source, see reference [61] (The Chinese version of the TAS-20: reliability and validity)
  2. bFor the data source, see reference [55] (Cross-cultural validation of a Chinese translation of the 20-item Toronto Alexithymia Scale)
  3. cComparison of TAS −20 total score and subscales scores between the adult prisoners and the adult norm of 2003
  4. dComparison of TAS −20 total score and subscales scores between the adult prisoners and the adult norm of 2007
  5. *p < 0.05 **p < 0.01 ***p < 0.001