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Table 2 Socio-demographic and clinical characteristics of the three samples

From: QLiS-SF: Development of a short form of the quality of life in schizophrenia questionnaire

  Sample 1 Sample 2 Sample 3
  Cross-sectional sample – first half Cross-sectional sample – second half Significance of difference between sample 1 & 2
(χ 2 test or t-test)
Longitudinal sample
Sample size n = 251 n = 261   n = 364
Sex (% male) 61% 55% 0.185 59%
Age (in years) 38.3 (± 11.5) 39.9 (± 11.6) 0.132 39.0 (± 11.7)
Family status    0.862  
 Single 73% 69%   72%
 Married 14% 18%   15%
 Divorced/separated 11% 12%   12%
 Widowed 1% 1%   1%
Education    0.329  
 None 5% 8%   5%
 Special education 1% 2%   1%
 Intermediate 53% 58%   57%
 Technical high school 2% 3%   3%
 University entrance qualification 33% 23%   27%
 Unknown 6% 7%   7%
Vocational status    0.612  
 No work 38% 34%   37%
 Sheltered work 11% 11%   12%
 Normal work status 22% 20%   20%
 Retired worker 21% 30%   25%
 Other 9% 5%   7%
Age at onset of illness 28.2 (± 9.2) 29.0 (± 10.1) 0.346 28.3 (± 9.5)
Duration of illness (in years) 9.5 (± 9.2) 10.6 (± 9.6) 0.229 10.1 (± 9.5)
Global Assessment of Functioning (GAF) 48.6 (± 15.1)
range 15–90
48.3 (± 16.1)
range 6–91
0.855 55.6 (± 14.4)
range 22–90