Table 5.

Pearson's correlation matrix between irritability, MADRS and SCL90 item 24 scores in participants divided according to age

First quartile (15–20 years) (n = 16)
	1. SCL90 item 11 (irritability)	2. MADRS total	3. SCL90 item 24
1. SCL90 item 11 (irritability)	1
2. MADRS total	0.325**	1
3. SCL90 item 24	0.405**	0.064	1
Second quartile (21–25 years) (n = 20)
1. SCL90 item 11 (irritability)	1
2. MADRS total	0.591**	1
3. SCL90 item 24	0.669**	0.459**	1
Third quartile (26–30 years) (n = 14)
1. SCL90 item 11 (irritability)	1
2. MADRS total	0.377**	1
3. SCL90 item 24	0.562**	0.296**	1
Fourth quartile (31–36 years) (n = 32)
1. SCL90 item 11 (irritability)	1
2. MADRS total	0.524**	1
3. SCL90 item 24	0.589**	0.262**	1

Montgomery–Asberg Depression Rating Scale; SCL90, Symptom Checklist-90.

^**Correlation is significant at P < 0.01 (two-tailed).