Asthma and COPD as co-morbidities in patients hospitalised with Covid-19 disease: a global systematic review and meta-analysis

Table 1 Prevalence of asthma in patients hospitalized with COVID-19

Subregion	Number of studies	Random model pooled prevalence (expressed as percentage)	95% Confidence Intervals	P for difference from reference subregion
North America	12	11.4	9.5–13.5	Reference region
North Europe	6	12.5	10.1–11.3	0.59, NS
South Europe	11	4.5	3.6–5.5	< 0.0001*
Western Europe	4	9.2	5.9–14.0	0.33, NS
East Asia	4	1.7	0.6–5.1	< 0.0001*

subregions with 2 or fewer studies excluded. * signifies statistically significant, two tailed at the 5% level

ISSN: 1471-2466