Studies reporting the particulate matter to airborne nicotine relationship (ratio) in indoor environments
| Location | Sampling method and time frame | N | Slope | Reference |
| 16 US cities, personal exposure | PM (RSP) and nicotine: active; collected together | 1498 | 10.9 | 131 |
| New York State, USA, homes | PM (RSP): activeNicotine: passive, colocated: 1 week | 47 | 9.8* | 35 |
| USA, railroads | PM (RSP): activeNicotine: active, collected together, 2 days | 306 | 8.6 | 84 |
| Norway, hospitality venues | PM (airborne dust) and nicotine: active, stationary, sampled in parallel | 48 | 7.1 | 132 |
| Metro Boston, USA | PM2.5: activeNicotine: passive, collected together, 2 days, only during public access | 57 | 9.1† | 82 |
| USA, truck cabs | PM2.5 and nicotine: active; sampling times comparable | 16 | 5.2‡ | 133 |
| Weighted slope | 1972 | 10.3 |
All PM and air nicotine measurements were reported in units of μm/m3. Studies that used log transformed data or differing time frames for PM and nicotine were excluded.
↵* Reported slope represents only residences with reported cigarette consumption. All residence (N=96) slope=10.8.
† Reported slope excludes two largest points. Authors also present slope representing all data points, slope=14.8.
↵‡ Nicotine collected using stand alone filter. Authors also collected nicotine inline after PM collection, slope using inline =5.5.
PM, particulate matter; RSP, respirable suspended particles.