. 2023 May 23;9(6):e16127. doi: 10.1016/j.heliyon.2023.e16127

Table 4.

Spearman correlations between average real-time readings and gravimetric sample readings.

Material	Total dust^a vs. total dust^b	PM_2.5^a vs. PM_2.5^b	Resp personal^a vs. Resp stat^b	Resp personal^a vs. Resp stat^a	PM₁₀^b vs. Thoracic^a
Quartz diorite	0.64**	−0.54**	−0.73*	0.87**	0.58**
Rhomb porphyry	−0.41	0.25	0.29	−0.78**	0.39*
Lactose powder	0.14	0.52**	0.13	–	0.51**

**significant at the 0.05 level, * significant at the 0.10 level.

Gravimetric.

DustTrak DRX.