Effect of Preexisting Asthma on the Risk of ICU Admission, Intubation, and Death from COVID-19: A Systematic Review and Meta-Analysis

Table 2

Newcastle–Ottawa Scale (NOS) for quality assessment of nonrandomized studies.

Author	Selection				Comparability	Outcome		Total score
	Representativenessof the sample	Samplesize	Nonrespondents/recruitment rate	Ascertainmentof exposure	The total population categorizedinto with and without asthma anddata adjusted for ICUadmission, intubation, and death	Assessmentof outcome	Adequacy offollow-up
Chhiba et al. [15]	1	1	1	2	0	1	1	7
Stephanie et al. [16]	1	1	1	2	1	1	1	8
Song et al. [17]	1	1	1	2	1	1	1	8
Mahdavinia et al. [18]	1	1	1	2	1	1	1	8
Beurnier et al. [19]	1	1	1	2	2	1	1	9
Doriane et al. [20]	1	1	1	2	1	1	1	8
Calderon et al. [21]	1	1	1	2	0	1	1	7
Choi et al. [22]	1	1	1	2	1	1	1	8
Bloom et al. [23]	1	1	1	2	1	1	1	8
Robinson et al. [24]	1	1	1	2	1	1	1	8
Castilla et al. [25]	1	1	1	2	1	1	1	8
Almazeedi et al. [26]	1	1	1	2	1	1	1	8
Mather et al. [27]	1	1	1	2	1	1	1	8
Lee et al. [28]	1	1	1	2	2	1	1	9
Uribe et al. [29]	1	1	1	2	2	1	1	9
Brinton et al. [30]	1	1	1	2	1	1	1	8
Kipourou et al. [31]	1	1	1	2	1	1	1	8
Schonfeld et al. [32]	1	1	1	2	1	1	1	8
Rosenthal et al. [33]	1	1	1	2	2	1	1	9