TABLE 2.

Meta‐regression analyses

Covariate	Number of studies	Pooled sensitivity	p‐Value	Pooled specificity	p‐Value
Sample size ≥100
Yes	8	0.89 (0.84–0.94)	0.04	0.96 (0.90–1.00)	0.05
No	8	0.85 (0.77–0.93)		0.85 (0.61–1.00)
Characteristics of patients
In‐patients	6	0.85 (0.76–0.93)	<0.001	0.89 (0.66–1.00)	0.07
In‐/out‐patients	10	0.89 (0.84–0.94)		0.94 (0.84–1.00)
Method of saliva collection
Coughed out	3	0.91 (0.83–0.99)	0.23	0.95 (0.78–1.00)	0.11
Other methods	13	0.87 (0.81–0.92)		0.92 (0.80–1.00)