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. 2015 Jul 7;12(7):7558–7581. doi: 10.3390/ijerph120707558

Table A1.

Update of coefficients and RMSE on combined spline adjustment approach.

Equation Intercept (a) RH (b) Nephelometer (c) Spline (d) Spline Knot 1 (e) RMSE
C-spline (Equation (8)) 0.36 0.69 1.07 −0.43 8.0 2537

1 If ln(Nephelometric PM) is <8, then the last term, which is “d × (ln(Nephelometric PM) − e)”, becomes a 0.