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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

From: Structural equation modeling of parasympathetic and sympathetic response to traffic air pollution in a repeated measures study

Moving average Latent/ Markers Factor loading (λ 1j ) (95% PI)b Variance (95% PI) Latent/Markers Factor loading (α 1k ) (95% PI)b Variance (95% PI)
04-hour Traffic/   0.137 (0.112, 0.165) Parasympathetic   1.720 (1.535, 1.921)
BCc 1.00 0.394 (0.364, 0.425) Tone/   
CO 0.65 (0.59, 0.72) 0.010 (0.006, 0.013) HFc 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)
24-hour 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)
48-hour 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)
72-hour 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)
  1. aHF, high frequency; SDNN, 5-min standard deviation of normal-to-normal intervals; rMSSD, square root of the mean squared differences of successive normal-to-normal intervals; BC, black carbon; CO, carbon monoxide; NO, nitrogen monoxide; NO2, nitrogen dioxide.
  2. b95% PI: 95% Posterior Interval.
  3. cReference marker.