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Table 1 Characteristics of schizophrenia drug trials published in Italy from 1948 to 2009 (n = 81 studies)

From: Forty-five years of schizophrenia trials in Italy: a survey

  (n) % (95% CI)
Area of Italy   
North 42 51.8 (40.4-63.0)
Center 19 23.4 (14.7-34.1)
South 20 24.6 (15.7-35.5)
Year of publication*   
1948-1980 20 25.3 (16.2-36.3)
1981-1995 36 45.5 (34.3-57.1)
1996-2009 23 29.1 (19.4-40.4)
Language of publication   
English 58 71.6 (60.4-81.0)
Italian 23 28.4 (18.9-39.5)
Drug treatment   
Antipsychotics 64 79.0 (68.5-87.2)
Other drugs 17 20.1 (12.7-31.4)
Diagnostic criteria   
Unclear 3 3.7 (0.77-10.4)
Standardized criteria 52 64.2 (52.7-74.5)
Implicit criteria 26 32.1 (22.1-43.3)
  1. *Two unpublished studies not included
  2. CI confidence interval.