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. Author manuscript; available in PMC: 2022 May 1.
Published in final edited form as: Environ Res. 2021 Mar 8;196:110923. doi: 10.1016/j.envres.2021.110923

Table 3.

Particle infiltration ratio -outdoor temperature exposure model parameters by different population scenarios (HVAC=mixed; HVAC=0; HVAC=1).

Dataset Model Coefficient estimate Standard error p-value
Full Dataset
All Houses (N=810) Intercept 0.622 0.066 <0.0001
Temperature 0.032 0.007 <0.0001
Temperatur^2 −0.001 0.0002 <0.0001
Houses without HVAC usage (N=255) Intercept 0.518 0.247 0.0372
Temperature 0.032 0.027 0.2408
Temperatur^2 −0.001 0.001 0.2317
Houses with HVAC usage (N=523) Intercept 0.691 0.073 <0.0001
Temperature 0.024 0.008 0.0040
Temperatur^2 −0.001 0.0002 <0.0001
Reduced Dataset*
All Houses (N=649) Intercept 0.480 0.036 <0.0001
Temperature 0.029 0.004 <0.0001
Temperatur^2 −0.001 0.0001 <0.0001
Houses without HVAC usage (N=189) Intercept 0.422 0.174 0.0161
Temperature 0.038 0.019 0.0467
Temperatur^2 −0.001 0.0005 0.0162
Houses with HVAC usage (N=431) Intercept 0.491 0.029 <0.0001
Temperature 0.026 0.004 <0.0001
Temperatur^2 −0.001 0.0001 <0.0001
*

Reduced dataset excluded 138 sampling days with particle infiltration ratio greater than one. Furthermore, all exposure data from five households were excluded in the reduced dataset where over 70% of the measured particle infiltration ratio were greater than one in these households.