| WHO | World Health Organization |
| COVID-19 | corona virus disease 19 |
| PUFA | polyunsaturated fatty acid |
| RR | relative risk |
| HR | hazard ratio |
| OR | odds ratio |
| CI | confidence interval |
| FFQ | food frequency questionnaires |
| BMI | body mass index |
| WHO | World Health Organization |
| COVID-19 | corona virus disease 19 |
| PUFA | polyunsaturated fatty acid |
| RR | relative risk |
| HR | hazard ratio |
| OR | odds ratio |
| CI | confidence interval |
| FFQ | food frequency questionnaires |
| BMI | body mass index |