Disability-adjusted life years (DALYs) based COVID-19 health impact assessment: a systematic review

BMC Public Health

Table 5 Certainty of evidence assessment result based on GRADE handbook

No.1.	Studies	Inclusion of life quality metrics				Overall certainty of each individual study
		Length of life (YLL)	Quality of life (YLD)
		Length of life (YLL)	Pre-recovery disability time	Pre-death disability time	Long-term consequence time
1.	Cuschieri et al. [9]	High	High	Very low	High	Moderate
2.	Fan et al. [11]	High	High	Very low	Very low	Low
3.	Oh et al. [12]	High	Very low	Very low	Very low	Very low
4.	Wyper et al. [13]	High	High	Very low	High	Moderate
5.	Islam et al. [14]	High	Very low	Very low	Very low	Very low
6.	Pifarre et al. [15]	High	Very low	Very low	Very low	Very low
7.	Ugarte et al. [16]	High	Very low	Very low	Very low	Very low
8.	Rommel et al. [18]	High	High	Very low	Very low	Low
9.	Gianino et al. [19]	High	High	Very low	Very low	Low
10.	Salinas-Escudero et al. [20]	High	High	High	Very low	Moderate
11.	Singh et al. [21]	High	High	High	High	High
12.	Jo et al. [22]	High	High	Very low	High	Moderate
Overall certainty of YLD subsets			Moderate	Very low	Very low
Overall certainty of YLL and YLD		High	Low
Overall certainty of outcomes (DALYs)		Moderate

The studies that did not include the life quality metrics were graded as “very low” certainty and the studies that includes the life quality metrics were graded as “high” certainty

ISSN: 1471-2458