Table 3. Descriptive statistics and reliability of the Edinburgh Postnatal Depression Scale (EPDS) in mothers in ALSPAC.
| Occasion | Mean Maternal
Age (SD) |
Mean Child Age (SD) | Sample
Size |
Mean
EPDS (SD) |
Above EPDS
Threshold (≥13) |
Above EPDS
Threshold (≥10) |
α |
|---|---|---|---|---|---|---|---|
| 1 | 27.76 (4.93) | 20.85 (5.66) wks. gest. | 12,151 | 6.99 (4.87) | 13.91% | 28.17% | 0.849 |
| 2 | 28.64 (4.86) | 32.65 (1.55) wks. gest. | 12,190 | 7.09 (5.09) | 15.23% | 29.99% | 0.866 |
| 3 | 29.05 (4.82) | 9.93 (3.72) wks. post | 11,816 | 6.06 (4.79) | 10.16% | 21.56% | 0.857 |
| 4 | 29.20 (4.77) | 8.77 (1.49) mos. | 11,318 | 5.42 (4.70) | 8.82% | 17.79% | 0.867 |
| 5 | 29.97 (4.75) | 21.15 (1.18) mos. | 10,384 | 5.72 (4.80) | 9.87% | 19.98% | 0.868 |
| 6 | 32.05 (4.73) | 2.81 (0.12) yrs. | 9,667 | 6.29 (5.05) | 12.39% | 24.11% | 0.882 |
| 7 | 34.00 (4.66) | 5.13 (0.11) yrs. | 8,937 | 6.05 (5.04) | 12.38% | 22.66% | 0.885 |
| 8 | 35.08 (4.61) | 6.17 (0.55) yrs. | 8,526 | 6.35 (5.15) | 13.52% | 25.63% | 0.889 |
| 9 | 37.76 (4.58) | 8.26 (0.26) yrs. | 7,762 | 6.14 (5.21) | 12.77% | 24.05% | 0.884 |
| 10 | 40.32 (4.62) | 11.28 (0.15) yrs. | 7,512 | 5.81 (5.29) | 12.55% | 22.64% | 0.888 |
| 11 | 48.60 (4.48) | 18.47 (0.52) yrs. | 4,107 | 7.47 (5.45) | 18.24% | 32.36% | 0.884 |