Table 3 Specific correlates: number of studies, measurement methods, and outcomes
From: Peripheral and neural correlates of self-harm in children and adolescents: a scoping review
Specific Correlates, Number of Studies | Number of Methods | Number of Outcomes |
|---|---|---|
Stress Response System | ||
  Cortisol levels, circadian (n = 11) | 3 | 1 |
  Cortisol levels, reactive (n = 8) | 4 | 1 |
  ANS, resting (n = 2) | 1 | 5 |
  ANS, reactive (n = 8) | 4 | 5 |
Serotonin System | ||
  Platelet serotonin uptake or imipramine binding (n = 3) | 2 | 2 |
  Blood levels serotonin (n = 4) | 2 | 1 |
  Blood levels serotonin precursors (n =  1) | 2 | 1 |
Sleep | ||
  Total duration, stage duration, latency to onset, latency to stages,   REM density (n = 6) | 1 | 2 |
Neuromodulators | ||
  Serum levels S100B (n = 2) | 1 | 1 |
  Serum levels neurotrophins (n = 2) | 1 | 1 |
Immune System | ||
  Serum/plasma levels cytokines (n = 3) | 1 | 2 |
Lipid Levels | ||
  Serum cholesterol, triglycerides (n = 2) | 1 | 2 |
Pituitary Hormones | ||
  Circadian rhythm growth hormone (n = 1) | N/A |  |
  Reactivity growth hormone (n = 1) | N/A |  |
Brain Function, Imaging | ||
  Response inhibition (n = 1) | N/A |  |
  Emotion processing (n = 3) | 2 | 2 |
  Decision-making (n = 1) | N/A |  |
  Social interaction (n = 5) | 3 | 1 |
  Reward processing (n = 2) | 2 | 1 |
  Self-identity paradigm (n = 3) | 2 | 2 |
  Functional connectivity (n = 6) | 1 | 3 |
Brain Function, Non-Imaging | ||
  Event-related potentials, attention capture (n = 1) | N/A |  |
  Event-related potentials, reward processing (n = 3) | 1 | 3 |
  Alpha waves, resting (n = 1) | N/A |  |
  Intracortical inhibition (n =1) | N/A |  |
Brain Structure | ||
  Gray matter volume (n = 3) | 1 | 3 |
  Gray and white matter volume (n = 2) | 1 | 2 |
  Pituitary gland volume (n = 1) | N/A |  |