Table 3.

Correlation coefficients between OP^EPR of indoor particles (${\mathit{OP}}_{\mathit{in}}^{\mathit{EPR}}$), OP^EPR of outdoor particles (${\mathit{OP}}_{\mathit{out}}^{\mathit{EPR}}$), λ, indoor temperature (T), indoor RH, presence of cooking activities (Cook), and mass of indoor (M_in) and outdoor (M_out) particles collected.

	${\mathit{OP}}_{\mathit{in},\mathit{vol}}^{\mathit{EPR}}$	${\mathit{OP}}_{\mathit{in},\mathit{mass}}^{\mathit{EPR}}$	λ	T	RH	Cook	Mout
${\mathit{OP}}_{\mathit{out},\mathit{vol}}^{\mathit{EPR}}$	0.351						0.355
${\mathit{OP}}_{\mathit{out},\mathit{mass}}^{\mathit{EPR}}$		0.504*					−0.329
λ	0.189	0.168
T	−0.124	−0.399	0.031
RH	0.080	0.420	−0.508*	−0.541*
Cook	−0.248	−0.515	−0.175	0.059	−0.060
Min	0.224	−0.168	0.056	−0.049	0.315	0.648*	−0.042

- Spearman’s rank correlations are listed for the parameters that were not normally distributed (${\mathit{OP}}_{\mathit{in},\mathit{vol}}^{\mathit{EPR}}$, λ, T, ${\mathit{OP}}_{\mathit{out},\mathit{mass}}^{\mathit{EPR}}$, M_in) and Pearson’s correlation coefficients are listed for the associations where both parameters were normally distributed (coefficients italicized). vol denotes volume-normalized; mass denotes mass-normalized.

- Bold values represent significance at p<0.05 and

^*represents significance at p<0.001.