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
| 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] |
*IQR = Interquartile range.
**P-value was calculated using Wilcoxon Rank Sum Test.
***P-value was calculated using Kruskal-Wallis Test.