Table A1. Two sets of expression coefficients incorporated into one regresion equation
Effect	Coefficient	Std Error	Std Coeff	t	P (2‐tail)
Constant	4.23	0.25	0.00	17.06	0.000
PC 1	1.92	0.73	0.45	2.63	0.060
PC 3	−4.20	1.13	−0.63	−3.73	0.020