Table 2.
Scientific articles focused on investigating PM2.5 effects on different physiological systems, based on articles published from 2016 to 2021
| Keywords | Total number (2016–2021) | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 |
|---|---|---|---|---|---|---|---|
| Fine particulate matter and toxicity | 1.390 | 186 | 199 | 208 | 322 | 234 | 241 |
| Fine particulate matter and respiratory diseases | 1.395 | 181 | 248 | 257 | 344 | 295 | 261 |
| Fine particulate matter and cardiovascular diseases | 1.318 | 179 | 199 | 218 | 276 | 248 | 198 |
| Fine particulate matter and kidney disease | 67 | 4 | 7 | 12 | 12 | 19 | 13 |
| Fine particulate matter and neurological diseases | 49 | 5 | 6 | 7 | 9 | 10 | 12 |
| Fine particulate matter and gastrointestinal diseases | 21 | 2 | 3 | 3 | 5 | 6 | 2 |
| Fine particulate matter and reproductive system | 20 | 1 | 1 | 2 | 5 | 6 | 5 |
| Fine particulate matter and COVID-19 or Sars-CoV-2 | 153 | - | - | - | - | 56 | 97 |
| Total | 4.413 | 558 | 663 | 707 | 974 | 853 | 829 |