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Table 3 Demographic characteristics: placebo-controlled studies

From: Suicidality and divalproex sodium: analysis of controlled studies in multiple indications

Characteristic Treatment group Total, N = 2,319, n (%) P value
   DVPX, N = 1,327, n (%) Placebo, N = 992, n (%)   
Age, years Mean ± SD 44 ± 18 44 ± 19   
  Least-squares mean 45 46   0.7454a
  Range 10 to 100 9 to 99   
  5 to 17 15 (1) 12 (1) 27 (1) 0.1413b
  18 to 24 131 (10) 83 (8) 214 (9)  
  25 to 30 140 (11) 138 (14) 278 (12)  
  31 to 64 855 (64) 617 (62) 1,472 (63)  
  ≥65 186 (14) 142 (14) 328 (14)  
Gender Female 740 (56) 544 (55) 1,284 (55) 0.3087b
  Male 587 (44) 448 (45) 1,035 (45)  
Race White Caucasian 1,109 (84) 825 (83) 1,934 (83) 0.4430b
  Other 218 (16) 167 (17) 385 (17)  
Participation duration, days Mean ± SD 68 ± 84 57 ± 64   0.2344a
  Least-squares mean 60 57   
  Range 1 to 400 1 to 391   
  1. aP value for the treatment group difference is from a two-way analysis of variance with the terms of treatment and study.
  2. bP value for the treatment group difference is from the Cochran-Mantel-Haenszel general association test controlling for study.
  3. DVPX = divalproex.