Table 2 Factor loadings ( λ _1j and α _1k coefficients) of the measurement models for the relation of Traffic and Parasympathetic Tone latent variables to its various marker variables ^a and the corresponding variance of latent (1/ τ ^Traffic and 1/ τ ^{Parasympathetic Tone} ) and its marker (1/ τ _j ^X and 1/ τ _k ^Y ) variables

Traffic/

0.137 (0.112, 0.165)

Parasympathetic

1.720 (1.535, 1.921)

BC^c

1.00

0.394 (0.364, 0.425)

Tone/

CO

0.65 (0.59, 0.72)

0.010 (0.006, 0.013)

HF^c

1.00

0.309 (0.273, 0.346)

NO

0.05 (0.05, 0.06)

3.0E-4 (2.7E-4, 3.4E-4)

SDNN

0.39 (0.38, 0.40)

0.073 (0.066, 0.080)

NO₂

0.01 (0.01, 0.01)

4.3E-5 (4.0E-5, 4.7E-5)

rMSSD

0.56 (0.55, 0.57)

0.052 (0.043, 0.062)

Traffic/

0.036 (0.029, 0.044)

Parasympathetic

1.728 (1.542, 1.930)

BC

1.00

0.127 (0.118, 0.136)

Tone/

CO

0.95 (0.86, 1.05)

0.010 (0.008, 0.011)

HF

1.00

0.305 (0.271, 0.342)

NO

0.06 (0.06, 0.07)

1.1E-4 (1.0E-4, 1.2E-4)

SDNN

0.39 (0.38, 0.40)

0.074 (0.067, 0.081)

NO₂

0.02 (0.02, 0.02)

3.2E-5 (3.0E-5, 3.4E-5)

rMSSD

0.56 (0.55, 0.57)

0.051 (0.042, 0.060)

Traffic/

0.023 (0.019, 0.029)

Parasympathetic

1.754 (1.568, 1.951)

BC

1.00

0.094 (0.087, 0.102)

Tone/

CO

1.01 (0.91, 1.12)

0.009 (0.007, 0.010)

HF

1.00

0.306 (0.270, 0.343)

NO

0.06 (0.06, 0.07)

7.7E-5 (7.0E-5, 8.5E-5)

SDNN

0.39 (0.38, 0.40)

0.073 (0.067, 0.080)

NO₂

0.02 (0.02, 0.03)

2.8E-5 (2.6E-5, 3.0E-5)

rMSSD

0.56 (0.55, 0.57)

0.052 (0.042, 0.061)

Traffic/

0.016 (0.013, 0.020)

Parasympathetic

1.753 (1.569, 1.953)

BC

1.00

0.069 (0.064, 0.075)

Tone/

CO

1.11 (1.00, 1.24)

0.008 (0.006, 0.009)

HF

1.00

0.304 (0.268, 0.340)

NO

0.06 (0.06, 0.07)

5.9E-5 (5.4E-5, 6.5E-5)

SDNN

0.39 (0.38, 0.40)

0.074 (0.067, 0.081)

NO₂

0.03 (0.02, 0.03)

2.5E-5 (2.4E-5, 2.7E-5)

rMSSD

0.56 (0.55, 0.57)

0.051 (0.042, 0.061)