Table 2.

Multivariate linear regression analysis of serum 5-HT of different models and pretreatments

Serum 5-HT	Unstandardized coefficients		Standardized coefficients	t	P-value
	B	Std error	Beta
Constant	363.23	8.67		41.91	<0.01
x1	−187.08	12.26	−1.07	−15.26	<0.01
x2	−168.54	12.26	−0.87	−13.75	<0.01
x3	−180.72	12.85	−0.90	−14.06	<0.01
x4	−87.96	11.46	−0.54	−7.67	<0.01
x1*x4	133.26	15.73	0.66	8.47	<0.01
x2*x4	288.03	16.78	1.12	17.16	<0.01
x3*x4	253.50	17.22	0.98	14.72	<0.01

Notes: Constant: sham pretreated with saline; y: value of serum 5-HT; x₁: MI pretreated with saline; x₂: depression pretreated with saline; x₃: MI + depression pretreated with saline; x₄: pretreated with trimetazidine; x₁*x₄: the interaction of MI and trimetazidine; x₂*x₄: the interaction of depression and trimetazidine; x₃*x₄: the interaction of MI + depression and trimetazidine.

Abbreviations: MI, myocardial infarction; 5-HT, 5-hydroxytryptamine.