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Table 1 Sample Characteristics

From: Genetics of depressive symptoms in adolescence

  Age 11
(N = 5480)
Age 13
(N = 5055)
Age 18
(N = 3289)
Mean age in months (SD) 127.7 (3.02) 153.6 (2.73) 213.9 (4.43)
Males N (%) 2706 (49.4) 2462 (48.7) 1414 (43.0)
SMFQ score (LQ-UQ)1 3 (1–6) 3 (1–5) 5 (3–9)
Subset with puberty data - N 3759 3147 1724
Puberty – number post-onset (%) Overall 1402 (37.3) 2913 (92.6) 1723 (99.9)
Male 525 (31.9) 1240 (88.5) 675 (100.0)
Female 877 (41.5) 1673 (95.8) 1048 (99.9)
  1. 1 Median child reported SMFQ score with lower and upper quartiles reported due to skew in score