Measure | The Stable group | The Increase group | ||||
 Number of people | 80 | 77 | ||||
 % females | 68.75% | 63.64% | ||||
 Education (n) | ||||||
  Low education | 8 | 4 | ||||
  Middle education | 50 | 54 | ||||
  High education | 22 | 17 | ||||
  No data | 0 | 2 | ||||
 Ethnicity (n) | ||||||
  Caucasian | 78 | 76 | ||||
  Asian | 1 | 0 | ||||
  No data | 1 | 1 | ||||
 % of twin pairs allocated to the same group | 9.59 | 14.03 | ||||
 | M | SD | Range | M | SD | Range |
 Age at T0 | 17.85 | 3.98 | 14–33 | 16.95 | 3.60 | 15–34 |
 JTV sum score at T0* | 15.58 | 1.57 | 11–17 | 14.96 | 2.16 | 7–17 |
 SCL-90 sum score at T0 | 127.08 | 26.13 | 92–214 | 130.73 | 33.91 | 90–245 |
 SCL-90 sum score at T1* | 121.94 | 25.89 | 90–212 | 156.65 | 42.18 | 105–305 |
 Number of negative life events between T0 and T1 | 2.95 | 1.44 | 1–7 | 3.40 | 1.98 | 1–10 |
 ESM measures at T0 | ||||||
  Number of unpleasant events | 15.91 | 9.01 | 1–50 | 17.12 | 10.00 | 2–44 |
 | M | SD within-person | M | SD within-person | ||
  Level of unpleasantness of unpleasant events | 0.91 | 0.86 | 0.87 | 0.86 | ||
  Negative affect score | 1.72 | 0.51 | 1.87 | 0.61 | ||
  Positive affect score | 4.88 | 0.83 | 4.72 | 0.91 |