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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