Table 4.

Associations between neuropeptides and HAMD scores item 6 in the three patient groups.

	Unstandardized coefficients		Standardized coefficients	t	p	R 2	Adjusted R2	F
	B	SE	Beta
Constant	0.38	0.077		4.92	<0.001	0.30	0.30	F(1, 96) = 41.88, p < 0.001
MDD group	0.95	0.15	0.55	6.47	<0.001
Constant	2.91	0.81	–	3.57	<0.01	0.37	0.36	F(2, 95) = 27.69, p < 0.001
MDD group	0.97	0.14	0.56	6.90	<0.001
Log10 endorphin	−0.96	0.31	−0.25	−3.12	<0.01

Independent variables: age, gender, education, BMI, group status, log₁₀ α-MSH, log₁₀ β-endorphins, log₁₀ neurotensin, log₁₀ orexin A, log₁₀ oxytocin and log₁₀ substance P, HAMD: 17 item Hamilton depression rating scale. MDD, major depressive disorders.