Table 3.
Estimated annual attributable deaths of population at risk from long-term exposure to fine particulate matter (PM2.5) in 2021 for Nairobi, Kenya
| Period | Annual mean PM2.5 conc. (µg/m3) |
Annual attributable deaths with 95% CI |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| WHO annual IT-1 |
WHO annual IT-2 |
WHO annual IT-3 |
WHO annual IT-4 |
Current WHO air QG |
|||||||
| N | CI | N | CI | N | CI | N | CI | N | CI | ||
| GEOHealth (BAM-1022) 2019–2021 2021 US Embassy (T640) 2021a |
18.4 ± 7.1 19.1 ± 9.2 16.9 ± 0.2 |
0 0 0 |
0 0 0 |
0 0 0 |
0 0 0 |
400 (300, 500) 400 (300, 600) 200 (100, 300) |
2.5 2.5 1.1 |
1100 (800, 1,200) 900 (600, 1,200) 700 (500, 900) |
6.2 5.3 4.1 |
1700 (1,300, 1,900) 1400 (900, 1,900) 1200 (800, 1,600) |
9.7 8.1 6.9 |
The risk estimate was based on the observed annual mean concentration for 2019, 2020, and 2021 against WHO annual interim targets (IT-1, IT-2, IT-3, and IT-4) and air quality guideline level of 5 (µg/m3). IT-1=35 µg/m3, IT-2=25 µg/m3, IT-3=15 µg/m3, IT-4=10 µg/m3, QG=5 µg/m3 (World Health Organization Quality Guideline).
a
Data available for only 135 days.