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Table 2 Particle exposure in the homes of the participants during sham and active indoor air filtration

From: An indoor air filtration study in homes of elderly: cardiovascular and respiratory effects of exposure to particulate matter

Filtration Living room Bedroom
Sham Active Sham Active
Particle number count (#/cm3) 7669 (3435–45866) 5352 (1241–56654) ND ND
PM2.5 total massa (μg/m3) 8.0 (3.4–20.7) 4.3 (0.2–12.2) 7.6 (1.4–19.1) 3.7 (0–14)
PM2.5 black carbon (BC) (ng/m3) ND ND 480 (199–1328) 219 (19.6–545)
PM2.5 UV absorbing PM (UVPM) (ng/m3) ND ND 361 (191–792) 201 (43.5–454)
PAHb (ng/m3) 0.48 (0.06–2.4) 0.25 (0.02–2)   
  1. Values are median (5th, 95th percentile). ND: not determined.
  2. aPM 2.5 total mass data have recently been reported elsewhere [19].
  3. bSum of 13 different polycyclic aromatic hydrocarbons (PAH): phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)fluoranthene, benzo(a)pyrene, perylene, indeno(1,2,3-c,d)pyrene, dibenzo(a,h)anthracene, benzo(g,h,i)perylene.