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Table 2 Distribution of maternal serum brain-derived neurotrophic factor (BDNF, ng/mL) levels in early pregnancy according to antepartum depressive symptoms, Lima, Peru, 2012

From: Association of decreased serum brain-derived neurotrophic factor (BDNF) concentrations in early pregnancy with antepartum depression

Depression

N

Mean ±  SD

Median [IQR] *

P -value

Depression

    

  No (0–9)

688

21.85 ± 6.42

21.22 [17.37-25.85]

0.024**

  Yes (≥10)

280

20.78 ± 5.97

20.31 [17.08-24.20]

Depression severity

    

  None (0–4)

334

21.99 ± 6.76

21.63 [17.30-26.55]

0.144***

  Mild (5–9)

354

21.73 ± 6.09

21.15 [17.63-25.62]

  Moderate (10–14)

158

20.42 ± 6.31

20.17 [16.68-24.03]

  Moderately severe (15–19)

88

21.11 ± 5.82

20.08 [17.20-24.45]

  Severe (20–27)

34

21.67 ± 4.54

21.36 [18.06-24.30]

  1. *IQR = Interquartile range.
  2. **P-value was calculated using Wilcoxon Rank Sum Test.
  3. ***P-value was calculated using Kruskal-Wallis Test.