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Table 1 Clinical characteristics among patients’ groups

From: Vitamin D serum level in major depressive disorder and schizophrenia

Illness characteristics MDD
N = 20 (%)
Schizophrenia
N = 20 (%)
p value
Age of onset (years) mean ± SD 26.6 ± 6.5 25.1 ± 6.8 ^0.482
Duration (years) mean ± SD 1.8 ± 1.5 7.6 ± 6.6 ^< 0.001*
Number of episodes mean ± SD 1.4 ± 0.6 2.4 ± 1.0 ^< 0.001*
Treatment    
Monotherapy 10 (50%) 8 (40%) #0.525
Polytherapy 10 (50%) 12 (60%)
  1. SD standard deviation, MDD major depressive disorder
  2. ^Independent t test
  3. #Chi-square test
  4. *Statistically significant < 0.05
  5. **Statistically highly significant < 0.01