Table 12. Descriptive statistics for each study presented in the article (N – number of participants, M – mean score, SD – standard deviation, BDI-I and BDI-II – Beck Depression Inventory I and II, PHQ-9 – Patient Health Questionnaire-9).
| Study I (N=51) | ||||
|---|---|---|---|---|
| Diagnosed | Healthy Controls, BDI-I ≤ 5 | Subclinical | Unclassified | |
| N | 29 | 22 | - | - |
| Age | M = 27.66, SD = 7.13 | M = 23.68, SD = 2.83 | - | - |
| 19 - 47 range | 20 - 33 range | - | - | |
| Gender | 9 male, 20 female | 11 male, 11 female | - | - |
| BDI-I score | M = 20.93, SD = 8.21 | M = 2.00, SD = 1.48 | - | - |
| Study II (N=76) | ||||
| Undiagnosed (N=76) | ||||
| Diagnosed | Healthy Controls, BDI-I ≤ 5 | Subclinical, BDI-I ≥ 10 | Unclassified, 5 < BDI-I < 10 | |
| N | - | 28 | 25 | 23 |
| Age | - | M = 25.32, SD = 6.46 | M = 24.44, SD = 5.08 | M = 25.22, SD = 6.78 |
| - | 18 - 43 range | 19 - 38 range | 18 - 40 range | |
| Gender | - | 8 males, 20 females | 4 males, 21 females | 9 males, 14 females |
| BDI-I score | - | M = 2.29, SD = 1.72 | M = 17.56, SD = 8.13 | M = 7.91, SD = 1.16 |
| Study III (N=91) | ||||
| Diagnosed | Undiagnosed (N=64) | |||
| Healthy Controls, BDI-II ≤ 5 | Subclinical, BDI-II ≥ 10 | Unclassified, 5 < BDI-II < 10 | ||
| N | 27 | 21 | 34 | 9 |
| Age | M = 27.19, SD = 7.23 | M = 24.29, SD = 4.99 | M = 25.06, SD = 6.58 | M = 26.78, SD = 8.74 |
| 19 - 42 range | 19 - 41 range | 18 - 44 range | 22 - 49 range | |
| Gender | 6 males, 21 females | 7 males, 14 females | 10 males, 24 females | 2 males, 7 females |
| BDI-II score | M = 34.26, SD = 9.18 | M = 2.24, SD = 1.70 | M = 24.06, SD = 10.08 | M = 6.78, SD = 0.97 |
| Study IV (N=117) | ||||
| Diagnosed | Undiagnosed (N=95) | |||
| Healthy Controls, BDI-II ≤ 5 | Subclinical, BDI-II ≥ 10 | Unclassified, 5 < BDI-II < 10 | ||
| N | 22 | 72 | 21 | 2 |
| (12 past MDD, 10 present MDD) | ||||
| Age | M = 18.91, SD = 1.34 | M = 19.00, SD = 1.23 | M = 18.43, SD = 0.81 | M = 18.00 |
| 18 - 24 range | 18 - 23 range | 18 - 21 range | ages 18, 18 | |
| Gender | 8 males, 14 females | 33 males, 39 females | 3 males, 18 females | 1 males, 1 females |
| BDI-II score | M = 21.82, SD = 5.70 | M = 1.60, SD = 1.48 | M = 22.95, SD = 4.25 | M = 6.50, SD = 0.71 |
| Study V (N=53) | ||||
| Diagnosed | Healthy Controls, PHQ-9 ≤ 5 | Subclinical | Unclassified | |
| N | 24 | 29 | - | - |
| Age | M = 30.88, SD = 10.37 | M = 31.45, SD = 9.15 | - | - |
| 16 - 52 range | 19 - 52 range | - | - | |
| Gender | 13 males, 11 females | 11 males, 13 females | - | - |
| PHQ-9 score | M = 18.33, SD = 3.50 | M = 2.66, SD = 1.80 | - | - |